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The battlefield now extends all the way to the moon, U.S. military’s highest-ranking officer says

The U.S. military must be ready to engage the enemy farther from home than ever before, according to its highest-ranking officer.

"Today's modern battlefield operates from the seabed to cislunar space," Gen. Dan Caine, the chairman of the Joint Chiefs of Staff, said Wednesday (Sept. 16) during a keynote address at the Air & Space Forces Association's Air, Space & Cyber Conference in National Harbor, Maryland.

Cislunar space extends from Earth all the way out to the orbit of the moon and includes the lunar surface. For several years now, military officials have been stressing the strategic importance of this huge region, which could get quite a bit busier in the next decade or so.

a military man in a blue uniform speaks at a silver lectern

Gen. Dan Caine, chairman of the Joint Chiefs of Staff, speaks at the Air & Space Forces Association’s Air, Space & Cyber Conference in National Harbor, Maryland, on Sept. 16, 2026. (Image credit: Craig Hudson, for Air & Space Forces Association)

For example, both the United States and China plan to build bases near the moon's south pole, which is thought to harbor large amounts of water ice. Winning this new moon race is critical, U.S. officials have stressed, because whoever does so will be able to establish norms of behavior on and around Earth's nearest neighbor.

China has already demonstrated impressive capabilities in the lunar sphere. In 2019, the nation's robotic Chang'e 4 mission pulled off the first-ever soft landing on the moon's mysterious far side. In 2024, Chang'e 6 returned far-side samples to Earth — another first.

Caine didn't cite such missions or even mention China by name. And he provided no details about what conflict on the cislunar battlefield might look like (though presumably it would be entirely robotic, with satellites seeking to take out adversary craft via jamming or blinding).

But he invoked the cislunar battlefield twice and noted that U.S. military branches cannot assume continued dominance of their various domains.

"Future conflicts will demand that we operate without the assumptions of uncontested access, secure rare areas or uninterrupted or uncontested sustainment," Caine said. "Our task, my friends, is to adapt right now, so the joint force is prepared to fight, endure and win in global contested environments, from the seabed to cislunar space."

The United States' long-held advantage in the final frontier will be key to securing such victories, he added.

"We must continue to ensure that the United States of America can strike anywhere on the globe at the time and place of our choosing, and sustain that force," Caine said. "Our United States Space Force must provide unrivaled space superiority and sustain the associated networks, domain awareness [and] data advantage that the joint force needs to win in space, both now and in the future."

We now know that part of the Space Force's strategy for maintaining that crucial superiority is the operation of weapons in Earth orbit. The branch's chief, Gen. Douglas Schiess, admitted as much during an address at the same conference on Tuesday (Sept. 15).

"Let me be crystal clear: Today, guardians operate on-orbit weapons that can defend the joint force against space-enabled attacks,” Schiess said during his speech. ("Guardian" is the official name for a member of the Space Force, just as members of the U.S. Navy are called sailors and members of the Army are soldiers.)

Schiess provided few details about these weapons but, later in the speech, implied that they are electromagnetic rather than kinetic in nature. That is, they're probably designed to knock out key systems of adversary satellites rather than destroy the entire spacecraft (which would create a cloud of potentially troublesome debris).

It's no surprise the U.S. possesses and employs such technology; the newsworthy bit is that a top official said it so openly. The nation's chief rivals in the space domain, China and Russia, possess advanced counterspace technologies as well. For example, both have destroyed defunct satellites with missiles and conducted close approaches of spacecraft with "inspector" vehicles.

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SpaceX Falcon 9 rocket-landing team gets 1st-ever Neil Armstrong Space Prize

The winners of the first-ever Neil Armstrong Space Prize just got their hardware.

Those awardees — the people who developed and mastered the famous landing capability of SpaceX's Falcon 9 rocket — were announced in April. But they didn't actually receive the prize until Tuesday night (Sept. 15), when it was bestowed during a ceremony at the Cosmos Club in Washington, D.C.

And it was richly deserved, according to Purdue University, which created the international award and named it after perhaps its most famous alumnus. (Purdue is known as the "cradle of astronauts," because 30 of its graduates have flown in space or been selected as NASA astronaut candidates.)

"Neil Armstrong's achievement rested on extraordinary engineering, teamwork and the courage to attempt what had never been done before," Mark Lundstrom, the John A. Edwardson Dean of the College of Engineering at Purdue, said in a statement on Tuesday.

"The Falcon 9 Booster Landing Team carries that spirit forward," he added. "By making rocket reuse practical at unprecedented scale, they changed the economics of spaceflight and opened new possibilities for science, exploration and commerce. It is especially fitting that they are the first recipients of the Neil Armstrong Space Prize."

Purdue wants the annual prize to become a sort of Nobel for space science and exploration. The inaugural honorees are five SpaceX employees, who represent the much larger Falcon 9 landing team:

  • Lars Blackmore, senior principal Mars landing engineer
  • Shana Diez, senior director of Starship reliability
  • Jon Edwards, senior vice president of Falcon & Dragon projects
  • Yoshiaki Kuwata, principal guidance, navigation and control engineer
  • Eduardo Velazquez, director of Crew Starship engineering

The two-stage Falcon 9 debuted in June 2010. The rocket was always envisioned to have a reusable first stage, though making that happen took a while.

"On a simple hand calc, I thought, 'Oh, this would work,'" said Kuwata, who joined SpaceX in 2012.

"But then the difficult part is going from this hand calculation to the reality, and there are a lot of nuances that we learned on the way," he told Space.com. "And on paper, I think it would have been done in like six months. But it took like three, four years to actually get it to work."

The milestone moment occurred on Dec. 21, 2015, on the 20th Falcon 9 flight to date: The rocket's first stage came back to Earth for its first-ever vertical touchdown, landing at Florida's Cape Canaveral Air Force Station (now known as Cape Canaveral Space Force Station) after sending 11 satellites to orbit for the company Orbcomm.

The Falcon 9 ticked another big box on April 8, 2016, acing a touchdown on a SpaceX "drone ship" stationed in the Atlantic Ocean.

These eye-popping sights have now become commonplace; to date, SpaceX has landed boosters more than 650 times during orbital missions. And these rockets don't stay on the ground for long. Six different Falcon 9 first stages now have more than 30 launches and landings under their belt, led by Booster 1067, which has flown a whopping 37 times.

Such extensive reuse has helped make the Falcon 9 the dominant rocket flying today. In 2025, the vehicle flew 165 missions — about half of the global total — and all of them were successful.

This success has inspired copycats. For example, two different Chinese rockets have landed successfully in the past few months, one of which employs foldable landing legs just like a Falcon 9 first stage.

But the imitation doesn't bother Velazquez.

"I think this is great," he told Space.com. "I mean, we didn't start from scratch, right? If you look at a cross section of our engines and the engines from the '60s, they're all very similar. So we're all kind of cribbing from the same place. But the fact that we are able to advance the bar so that everybody else is landing first stages is just great. I think we all move forward together, and we need more entrants in the field to really have a big kind of spacefaring economy and civilization."

a large silver rocket comes in for a landing on its launch pad near the sea

Composite photo showing the Super Heavy booster of SpaceX's Starship megarocket coming in for a landing on the launch mount on Oct. 13, 2024. (Image credit: SpaceX via X)

SpaceX is planning to sunset the Falcon 9 in the relatively near future in favor of Starship, the fully reusable megarocket it's developing to help humanity settle the moon and Mars, among other exploration tasks.

Starship has flown 13 test flights to date, all of them suborbital. SpaceX has already successfully recovered the giant vehicle's Super Heavy first stage on three occasions, catching the booster with the "chopstick" arms of the launch tower at its Starbase site in South Texas.

Such success follows quite naturally from the experience the company built up with the Falcon 9 (and its cousin the Falcon Heavy). But landing and reflying Starship's upper stage, known as Ship, is a different animal. (Falcon upper stages are expendable.)

"The bigger step change for Starship is the stage two — Ship upper stage — reusability," Kuwata said.

"In Monte Carlo simulations, [Ship landings] work well," he added. "And then we kind of demonstrated that pinpoint landing, precision landing, on the ocean many times. But I feel we will find out more things along the way by trying many times."

"Yeah, the 'trying many times' I think is kind of key," Velazquez said. "And I think we're getting pretty close to to catching a Ship."

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Russia launches Progress 96 with 3 tons of cargo to the space station (video)

Russia launched a cargo mission toward the International Space Station today (Sept. 16), delivering the freighter spacecraft to orbit for a three-day rendezvous journey.

The robotic Progress 96 spacecraft lifted off atop a Soyuz rocket from the Russian-run Baikonur Cosmodrome in Kazakhstan today at 9:33 a.m. EDT (1333 GMT).

From engine ignition through solar array deployment on the spacecraft, the Progress 96 launch was completely nominal. It was "a flawless launch," said NASA's Rob Navias during the mission's livestream this morning, with "an excellent climb to orbit by the Soyuz booster."

A soyuz rocket launches from the Baikanour Cosmodrome.

Roscosmos' Progress 96 cargo spacecraft launches from the Baikanour Cosmodrome on a Soyuz rocket on Sept. 16, 2026. (Image credit: NASA)

Progress 96 is loaded with about 3 tons of food, propellant and other supplies for the astronauts aboard the International Space Station (ISS). The freighter will deliver this cargo three days after launch, if all goes according to plan. You'll be able to watch rendezvous and docking activities when the time comes.

The freighter will remain docked to the orbiting lab for about five months. It will then be loaded up with trash and sent down to a fiery death in Earth's atmosphere over the Pacific Ocean.

The Progress 94 spacecraft met this fate on Sept. 7, departing from ISS' Poisk module to make room for Progress 96.

A soyuz rocket launches from the Baikanour Cosmodrome.

(Image credit: NASA)

Progress is one of four spacecraft that fly operational cargo missions to the ISS these days, along with Japan's HTV-X, SpaceX's Dragon capsule and Northrop Grumman's Cygnus. All but Dragon are expendable, burning up in our air when their time in orbit is up.

There are currently seven people living aboard the ISS — NASA astronauts Jack Hathaway, Jessica Meir and Anil Menon; the European Space Agency's Sophie Adenot, who last month became the first French woman ever to perform a spacewalk; and Pyotr Dubrov, Andrey Fedyaev and Anna Kikina of the Russian space agency Roscosmos.

Editor's note: This story was updated at 10 a.m. ET on Sept. 16 with news of successful launch.

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SpaceX’s next Starship launch will lift off on Sept. 22 and aim to reach orbit for 1st time

We now have a launch date for Starship's most ambitious mission to date.

SpaceX announced today (Sept. 15) that it's targeting Sept. 22 for the first orbital flight of Starship, the fully reusable megarocket that the company is developing to help humanity settle the moon, Mars and more.

Liftoff, from SpaceX's Starbase site in South Texas, will occur during a 75-minute window that opens at 8:15 a.m. EDT (1215 GMT and 7:15 a.m. local Texas time). You can watch it live here at Space.com when the time comes.

SpaceX's Starship megarocket launches on its 12th test flight, on May 22, 2026.

SpaceX is targeting Sept. 22 for Starship's first-ever orbital launch, a landmark flight that will deploy 26 Starlink satellites and last about 10 hours. (Image credit: SpaceX)

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The upcoming flight will be the 14th overall for Starship, which debuted in April 2023 and has flown twice so far in 2026. But the 408-foot-tall (124-meter-tall) vehicle's first 13 jaunts were all suborbital, so Flight 14 will be a landmark.

"By going to orbit, the next phase of developing Starship to be fully and rapidly reusable can begin," SpaceX wrote in a Flight 14 mission description.

"This will also mark the first time we plan to deploy Starlink V3 satellites into the constellation, delivering a payload that will dramatically expand connectivity speeds and reliability around the world," the company added.

Starlink, SpaceX's network of broadband satellites in low Earth orbit, currently consists of more than 11,000 active spacecraft. None of those are the larger, more capable V3 version, which are designed to launch on Starship.

Flight 14 will carry up 26 of these next-gen craft — the first of many, if all goes to plan. SpaceX founder and CEO Elon Musk has said the company wants the Starlink megaconstellation to eventually consist of 100,000 V3 satellites.

Three of the Starlink craft launching on Flight 14 have been outfitted with cameras and will photograph the heat shield on Starship's upper stage, known as Ship, after deployment. SpaceX will use this imagery to study and potentially improve the heat shield, which protects Ship during its return trip through Earth's atmosphere.

If all goes according to plan on Sept. 22, the 171-foot-tall (52-m-tall) Ship will complete six orbits of Earth at an altitude of about 171 miles (275 kilometers). The vehicle will then maneuver its way to a splashdown in the Pacific Ocean west of Chile about 10 hours after launch, SpaceX wrote in the mission description.

That's a very different plan than previous Starship flights. On those suborbital missions, Ship stayed aloft for just 65 minutes or so, did not complete an orbit of Earth and came down in the Indian Ocean, off the coast of Western Australia.

But Flight 14 will be more of the same for Starship's first-stage booster, known as Super Heavy. If all goes to plan, the giant rocket will splash down in the Gulf of Mexico about seven minutes after liftoff, as it has done on a number of previous flights.

So there will be no catch — of either Ship or Super Heavy — by the "chopstick" arms of Starbase's launch tower on Flight 14. SpaceX has pulled off tower catches of Super Heavy on three occasions to date but has never done so with Ship. This recovery method will eventually be the norm on Starship flights, leading to faster and more efficient reuse of the vehicle, Musk has said.

So, while Flight 14 aims to check a very big box — reaching orbit — other milestones will be reserved for future flights. A Ship tower catch will be among the most anticipated, along with refueling the vehicle in orbit, something that will be required for missions to the moon, Mars and beyond.

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SpaceX launches 2nd classified mission for US Space Force in less than a week (photos)

SpaceX launched its second classified mission for the U.S. Space Force in less than a week tonight (Sept. 16).

A Falcon 9 rocket lifted off from California's Vandenberg Space Force Base today at 9:07 p.m. EDT (6:07 p.m. local California time; 0107 GMT on Sept. 17).

We don't know much about tonight's mission, which was called USSF-259. SpaceX's webcast didn't shed any light of note; it ended shortly after the Falcon 9's first stage returned to Earth for a landing in the Pacific Ocean atop a drone ship about 8.5 minutes after launch.

a rocket rests on the deck of a ship at sea

The Falcon 9's first stage rests on the deck of a drone ship shortly after launching the USSF-259 mission for the U.S. Space Force on Sept. 16, 2026. (Image credit: SpaceX)

That touchdown was the 13th for this particular booster, which is designated 1097. One of the booster's previous landings was a big milestone for SpaceX. This past April, B1097 pulled off SpaceX's 600th touchdown of an orbital-class rocket, during a launch that sent 25 of the company's Starlink internet satellites to low Earth orbit.

Tonight's mission was the second that SpaceX has flown for the U.S. Space Force in a six-day span: A Falcon 9 launched the similarly classified USSF-153 from Vandenberg on Sept. 10.

Previous Booster 1097 missions

Sentinel-6B | Twilight | NROL-172 | Transporter-17 | 8 Starlink missions

Tonight's launch was SpaceX's 110th of 2026. The vast majority of the company's flights so far this year — 106 of them, in fact — have been performed by the workhorse Falcon 9.

The powerful Falcon Heavy has launched twice in 2026, as has SpaceX's next-gen megarocket, Starship. Both Starship liftoffs this year have been suborbital test flights. The next Starship launch, which is expected to occur in the next two weeks, will apparently take the vehicle orbital for the first time.

Editor's note: This story was updated at 11:50 p.m. ET on Sept. 15 with the new launch date of Sept. 16. It was updated agai at 9:28 p.m. ET on Sept. 16 with news of successful launch and rocket landing.

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Vega C rocket launches 2 European Earth-observing satellites to orbit from South America (video)

Two European Earth-observing spacecraft lifted off from South America tonight (Sept. 14).

A Vega C rocket carrying the FLEX and Copernicus-3C satellites launched from Europe's Spaceport in Kourou, French Guiana at 9:21 p.m. EDT (10:21 p.m. local time in Kourou and 0121 GMT on Sept. 15).

Both FLEX and Sentinel-3C were deployed as planned. They were released at an altitude of about 509 miles (820 kilometers), and both were flying freely by 116 minutes after launch.

A Vega C rocket launches the FLEX and Sentinel-3C Earth-observation satellites to Earth orbit from Kourou, French Guiana on Sept. 14, 2026.

A Vega C rocket launches the FLEX and Sentinel-3C Earth-observation satellites to Earth orbit from Kourou, French Guiana on Sept. 14, 2026. (Image credit: ESA/Avio)

The 875-pound (397-kilogram) FLEX will detect and monitor vegetation fluorescence, which explains its name (a shortening of "Fluorescence Explorer"). By doing so, it will map plant photosynthetic activity — something no satellite can do at the moment, according to ESA.

FLEX's data will be important not only "for a better understanding of the global carbon cycle, but also for agricultural management and food security," ESA wrote in a FLEX mission desription. "This is of particular relevance due to demand the growing world population is placing on the production of food."

Sentinel-3C is part of the European Union's Copernicus Earth-observation program. The 2,520-pound (1,1143-kg) satellite will continue the Sentinel-3 line, which is aging but still going strong in low Earth orbit; Sentinel-3A and Sentinel-3B, which launched in 2016 and 2018, respectively, remain active.

"Like its two older siblings in orbit, Sentinel-3C carries a suite of cutting-edge instruments that measure systematically Earth’s oceans, land, ice and atmosphere to monitor and understand large-scale global dynamics," ESA wrote in a Sentinel-3C description. "It provides essential information in near-real time for ocean and weather forecasting."

illustration of a boxy silver satellite flying over earth

Artist's illustration of a Sentinel-3 satellite in orbit. (Image credit: ESA/ATG medialab)

The 115-foot-tall (35-meter-tall) Vega C debuted in July 2022 and had seven flights under its belt before today, six of them successful.

The rocket was developed by the European Space Agency and originally operated by the France-based company Arianespace. The Italian outfit Avio now runs the vehicle's liftoffs, however; today's launch was the second Avio has managed.

Editor's note: This story was updated at 9:35 p.m. ET with news of successful liftoff, then again at 1:10 a.m. ET with news of successful satellite deployment.

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SpaceX launches 3 telecom satellites to orbit on 700th Falcon mission of all time (video)

SpaceX lofted three telecom satellites to orbit today (Sept. 13) on a milestone mission for the company.

A Falcon 9 rocket lifted off from Florida's Cape Canaveral Space Force Station today at 2:49 p.m. EDT (1849 GMT), carrying the final three satellites for Luxembourg-based SES' O3b mPOWER constellation.

It was the 700th mission to date for SpaceX's Falcon rocket family, according to the company. That family first spread its wings in March 2006 when the Falcon 1 debuted. The Falcon 1 flew a total of five times, twice successfully, before giving way to the workhorse Falcon 9 in 2010. The Falcon 9 has conducted the vast majority of the family's flights; the only other member, the still-active Falcon Heavy, has launched 13 times to date.

A SpaceX Falcon 9 rocket launches three O3b mPOWER satellites for the telecom company SES from Florida on Sept. 13, 2026.

A SpaceX Falcon 9 rocket launches three O3b mPOWER satellites for the telecom company SES from Florida on Sept. 13, 2026. (Image credit: SpaceX)

The Falcon 9's first stage came back to Earth a little less than nine minutes after launch today, landing in the Atlantic Ocean on the SpaceX drone ship "A Shortfall of Gravitas." It was the 29th flight for this particular booster, which is designated B1080.

The rocket's upper stage, meanwhile, continued hauling the O3b mPOWER trio to medium Earth orbit (MEO). The satellites were deployed as scheduled, being released at an altitude of 5,000 miles (8,000 kilometers) over a 14-minute span starting roughly 33.5 minutes after launch.

SES already operates 10 O3b mPOWER satellites in MEO. The spacecraft that went up today will complete the constellation, which is "purpose-built to deliver predictable low latency, exceptional throughput and unprecedented flexibility for industries where uptime isn’t optional," according to the company.

"It transforms how networks operate by pairing advanced software defined satellites with an intelligent ground and software ecosystem — ensuring guaranteed performance, even as global bandwidth demands surge," the company wrote.

The O3b mPOWER satellites, which are built by Boeing, weigh about 3,750 pounds (1,700 kilograms) apiece. SpaceX has launched all of them, on six Falcon 9 launches beginning in December 2022.

Previous Booster 1080 missions:

Ax-2 | Euclid | Ax-3 | CRS-30 | SES ASTRA 1P | NG-21 | 22 Starlink missions

Today's launch was SpaceX's 107th orbital mission of the year. The Falcon 9 has performed 105 of those flights, with the Falcon Heavy conducting the other two.

SpaceX has also launched two suborbital test flights of its Starship megarocket in 2026 and is gearing up for the third, which apparently will take the giant vehicle orbital for the first time.

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Rocket Lab protests NASA’s decision to award Blue Origin $700 million Mars orbiter contract

Rocket Lab still holds out hope that it can build NASA's next Mars orbiter.

The agency picked Blue Origin for that job earlier this month, awarding Jeff Bezos' spaceflight company $700 million to develop, launch and operate the Mars Telecommunications Network (MTN).

Today (Sept. 11), however, Rocket Lab announced that it has challenged that decision, filing a formal protest with the Government Accountability Office (GAO).

"NASA's award decision appears to be inconsistent with the eligibility criteria mandated by Congress. In addition, the agency’s punitive review of Rocket Lab's technical volume was inconsistent, making incorrect assertions and conclusions," Rocket Lab said today in an X post that laid out its argument.

"Procurement standards exist to ensure fair competition and protect public investment," the California-based company added. "We are pursuing this review to ensure those standards are upheld for critical infrastructure that will underpin American exploration at Mars for decades to come."

As its name suggests, the MTN orbiter will serve as a communications link between mission controllers here on Earth and other NASA spacecraft studying the Red Planet. Just two agency orbiters fulfill that relay role these days, and both are quite old: Mars Odyssey launched in 2001, and the Mars Reconnaissance Orbiter lifted off in 2005.

NASA had been eyeing a new Mars telecom orbiter for years and finally got Congressional funding for it in July 2025 — $700 million, to be precise. The agency issued a request for proposals this past May, drawing considerable interest from the private sector.

Blue Origin and Rocket Lab were widely considered the front-runners, and NASA ended up going with Blue. The award calls for the company to deliver MTN (which, despite the "network" in its name, is a single spacecraft) to NASA no later than Dec. 31, 2028. It's expected to be up and running at the Red Planet by 2030.

Blue Origin has been in Rocket Lab's shoes before, and has behaved similarly. Bezos' company filed a protest with the GAO in 2021 after NASA picked SpaceX to provide the first crewed moon lander for the agency's Artemis program.

The GAO denied the protest in July of that year. Blue Origin then sued NASA but lost in court in November 2021. The story has a happy ending for the company, however: NASA decided to select a second Artemis lander as well, and Blue Origin won that contract in 2023. We'll see how this story plays out for Rocket Lab...

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2 private spacecraft zoom within 650 feet of each other to showcase ‘advanced capabilities’ in orbit (photos)

A pair of private spacecraft just showed off some impressive maneuverability high above Earth.

The two probes — Mira satellites operated by the California startup Impulse Space — zoomed within 650 feet (200 meters) of each other in low Earth orbit (LEO) recently. The rendezvous demonstrated skills that could be useful to a variety of customers down the road, according to the company.

"These types of dynamic, agile maneuvers are how we unlock full access to space after launch and create new mission possibilities," Tom Mueller, CEO and founder of Impulse Space (and, prior to that, the first person Elon Musk ever hired at SpaceX), said in a statement on Tuesday (Sept. 8). "Our teams that design, build and operate Mira are leading the way toward a true space age, and customers across all sectors will be the beneficiaries."

photo of a cube-shaped satellite in deep space, taken from a distance by another satellite

The LEO-3 Mira vehicle, taken from a distance of approximately 700 meters (2,300 feet) by a camera onboard LEO-2. (Image credit: Starfish Space/Impulse Space)

Mira is an orbital transfer vehicle — a spacecraft designed to deliver customer payloads to precise locations in Earth orbit or beyond. The dishwasher-sized Mira can carry up to 660 pounds (300 kilograms) of gear and is highly maneuverable, as the recent rendezvous showed.

The operation involved Mira satellites that launched in January 2025 and November 2025, on missions that Impulse calls LEO Express 2 (LEO-2) and LEO Express 3 (LEO-3), respectively.

a white cube on a black background

Impulse Space's LEO-2 Mira vehicle, as seen from a telescope onboard LEO-3 from a distance of approximately 5,000 meters (16,400 feet). (Image credit: HEO/Impulse Space)

The action began this past February, when the LEO-2 Mira conducted a lengthy engine burn to close in on its counterpart. LEO-2 performed additional, smaller burns throughout the spring and summer, coming into orbital alignment with LEO-3.

"Then in July, LEO-2 executed a series of close approaches to LEO-3, starting at about 820 meters [2,690 feet] apart and subsequently moving closer to LEO-3," Impulse Space wrote in the Tuesday update. "Ultimately, for the closest approach, LEO-2 maneuvered to within about 200 meters of LEO-3."

Both Miras chronicled the rendezvous, snapping photos of each other with onboard camera gear. Two other companies, Starfish Space and HEO, worked with Impulse Space to pull off this orbital photo shoot.

Impulse has worked with Starfish before. The duo collaborated late last year on a rendezvous between LEO-2 and the first space-flown Mira, which launched on the Leo Express 1 mission in November 2023.

On that operation, called Remora, LEO 2 used Starfish Space navigation software to get within 4,100 feet (1,250 m) of LEO 1.

"We're showcasing some of the advanced capabilities that set Mira apart from other vehicles," Drew Damon, vice president of spacecraft programs at Impulse, said in Tuesday's statement. "Twice now, we've demonstrated that Mira has the agility and propulsion to support a new class of dynamic operations on orbit, and our team is excited to continue tackling the mission sets Mira is uniquely qualified to handle."

Impulse is not alone in developing and demonstrating orbital maneuverability. Such skills are a key priority of national governments, which want to service and upgrade their own satellites — and keep tabs on the activities of adversary craft. For example, earlier this year, two Russian spacecraft got within a mere 10 feet (3 m) of each other high above Earth.

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25 years ago, a NASA astronaut witnessed the tragic 9/11 attacks from space. Here’s what he saw.

Frank Culbertson had a birds-eye view of one of the most memorable and tragic events in American history.

The NASA astronaut was the only American off of Earth on Sept. 11, 2001. He was circling the planet aboard the International Space Station (ISS) when terrorists flew commercial jets into the twin towers of the World Trade Center in New York City, killing more than 2,700 people.

The ISS passed over New York shortly after the attacks took place, so Culbertson saw the devastation from an eerie remove. He shared his thoughts with Mission Control at NASA's Johnson Space Center in real time, chronicling the tragedy like no one else could.

satellite photo of a large city on a bay, with a river running through it and smoke rising from the center of the city

The aftermath of the 9/11 attacks on the World Trace Center in New York City, as seen by the astronauts onboard the International Space Station on Sept. 11, 2001. (Image credit: NASA)

"We could see New York City and the smoke from the fires," Culbertson said. "Our prayers and thoughts go out to all the people there and everywhere else here — I'm looking up and down the East Coast to see if I can see anything else — and to the people in Washington."

Terrorists hijacked four commercial planes on 9/11, flying two of them into the World Trade Center and one into the Pentagon in Washington, D.C. Passengers on the fourth plane overpowered the hijackers, forcing it to crash in a field in Pennsylvania rather than hit the terrorists' intended target, which was likely the U.S. Capitol building or the White House.

"I hope that the people responsible are caught and brought to justice as soon as possible," Culbertson added. "But first, our prayers and condolences to all involved. And I just wanted the folks to know that their city still looks very beautiful from space. I know it's very difficult for everybody in America right now, and I know folks are struggling very hard to to deal with this and recover from it. But the country still looks good, and, for New Yorkers, your city still looks great from up here."

Culbertson gave a more complete accounting of his thoughts in an open letter, which he published a day after the attacks.

"The world changed today. What I say or do is very minor compared to the significance of what happened to our country today when it was attacked," he wrote.

"It's horrible to see smoke pouring from wounds in your own country from such a fantastic vantage point," Culbertson added. "The dichotomy of being on a spacecraft dedicated to improving life on the Earth and watching life being destroyed by such willful, terrible acts is jolting to the psyche, no matter who you are."

a man floats in zero gravity holding a camera in each hand

NASA astronaut and ISS commander Frank Culbertson on Sept. 17, 2001 aboard the International Space Station. (Image credit: NASA)

Culbertson arrived at the ISS on Aug. 12, 2001 aboard the space shuttle Discovery along with cosmonauts Vladimir Dezhurov and Mikhail Tyurin. The trio comprised Expedition 3, the third-ever crewed mission to the orbiting lab, which ran through December of that year.

We're now up to Expedition 75, and there have been no breaks: The ISS has been continuously staffed by rotating astronaut crews since November 2000.

Expedition 3 was Culbertson's third and final spaceflight. He retired from NASA in August 2002 and went to work in the private sector. Among other roles, he led human spaceflight efforts at Orbital Sciences Corp., which built the Cygnus ISS resupply spacecraft. Cygnus still flies today, for the aerospace giant Northrop Grumman, which bought Orbital Sciences in 2018.

Culbertson, 77, retired from Northrop Grumman in 2018. He currently serves on the board of directors of the nonprofit Space Foundation, among other roles.

two male astronauts hold up a bag full of small american flags inside a spacecraft

NASA astronauts Mark Kelly (left) and Dan Tani hold a bag of American flags on the flight deck of the space shuttle Endeavour. The flags carried on the shuttle included 6,000 small U.S. flags, one U.S. flag that was recovered from the debris of the World Trade Center, a Marine Corps flag that was retrieved from the Pentagon, and an American flag from the State of Pennsylvania. (Image credit: NASA)

You can read more about Culbertson's experiences on NASA's dedicated 9/11 page. That page also outlines how the agency helped emergency managers assess the damage in New York City just after the attacks and discusses some of the ways NASA has honored 9/11 victims and their families over the years.

For example, NASA flew nearly 6,000 small American flags on the STS-108 mission of the space shuttle Endeavour, which launched on Dec. 5, 2001 and landed 12 days later.

"Students working out of Johnson Space Center in Houston assembled commemorative packages that included the space‑flown flags, which were then presented to victims' families," NASA officials wrote about the project. "Distribution began on June 14, 2002 — National Flag Day — during a ceremony at the American Museum of Natural History’s Rose Center for Earth and Space in New York."