Category: earth

We are a planet-based species: With a few notable (astronaut) exceptions, everyone who has ever lived remained glued to our spinning Earth, which now houses 8.3 billion people.

That's the gravity of the situation. But we're also a world of floods, typhoons, earthquakes, heat and cold calamities, volcanic eruptions and even encounters with sun-caused auroras and bruises from incoming asteroids.

It's quite a world worth watching — and for decades that's what spacecraft have been doing. But what do they view and who's on the other end of the space-based telescopes capturing our daily doings, faults and all, down here on terra firma?

Privacy, security and trust

Recently, the Organization for Economic Co-operation and Development (OECD), a group based in Paris, published a report on the expanding access to satellite Earth-observation data, spotlighting what it means for privacy, security and trust.

"Advances in optical systems, photonics, cloud computing and artificial intelligence [AI] have democratized both the quality and accessibility of satellite data. However, this convergence of technologies also carries risks, including for national security and privacy," states the report, which was authored by the OECD's Marit Undseth and Claire Jolly.

Broadening access to advanced satellite data also creates new challenges, states the report, such as one of the key characteristics of Earth observation — its dual-use nature. "The same satellites used to track illegal fishing can often also detect military troop movements," the authors write.

New concerns

The OCED report notes that Earth-observation data and the technological convergence with artificial intelligence raise new concerns about national security, privacy and the ethical use of these data.

In fact, the report points to the growing hazard of fake or incorrectly used satellite imagery. "As part of the growing trend of digital disinformation, the trust in satellite data can be eroded by fake, misinterpreted or intentionally misrepresented imagery," it states.

Space.com asked leading remote-sensing specialists what's being done, what's being learned and what we should worry about.

Sovereignty and cost efficiency

Viktor Stoyanov is the chief operating officer of Smart Solutions at Space42, where he oversees the business unit's operational and financial performance.

Space42 is a United Arab Emirates-based space technology company that integrates satellite communications, geospatial analytics and AI capabilities. The group runs the Foresight Earth Observation constellation of synthetic aperture radar (SAR) satellites.

Space.com asked Stoyanov about the growing international use of remote-sensing data.

"Governments increasingly expect Earth-observation systems to deliver both sovereignty and cost efficiency, two goals that were long seen as mutually exclusive, as sovereignty typically meant heavy in-country investment in duplicative research and development and capital infrastructure," he responded.

Dual use

Stoyanov said Space42's focus is to combine those two outcomes.

"We believe that can only be achieved through international cooperation. Our Foresight constellation reflects this model, as the first sovereign dual-use synthetic aperture radar constellation in the region," Stoyanov said.

The satellites were manufactured in partnership with ICEYE in Finland, with critical integration and testing completed in the organization's facility in Abu Dhabi.

"The Abu Dhabi facility was built in cost-cautious and scalable manner, so that it can satisfy current sovereignty requirements commensurate with the constellation size, with the ability to expand the facility and meet demand of future programs," Stoyanov said.

Through cloud, dust and darkness

What new in-orbit technologies are being applied to Earth observation?

"The biggest shift in recent years has been the move from few, large, general-purpose platforms to constellations of small, specialized satellites and synthetic aperture radar," said Stoyanov.

"SAR satellites image through cloud, dust and darkness, which matters enormously for our region and for any customer who needs consistency regardless of timing and weather," he added.

Looking ahead, Stoyanov said that the short lifespan of satellites in low Earth orbit is an opportunity to ensure that each replenishment cycle becomes an upgrade cycle.

"As we plan to maintain and expand our fleet, we will continuously seek to deploy technical improvements across various performance metrics of the system — resolution, latency, satellite life, for example," said Stoyanov.

Artificial intelligence

A SAR constellation generates far more imagery than analysts can review manually within the allocated time, Stoyanov said. So the value lies in what can be extracted from it, not in the pixels themselves.

AI is therefore becoming increasingly important as a sorting tool for remote-sensing data, Stoyanov said. It is now the only practical way to work, for three reasons: volume, speed and accuracy.

Customers responding to a flood, a maritime incident or a supply-chain disruption need an answer in minutes, not a report next week — "decision-grade intelligence within minutes," explained Stoyanov.

On the topic of accuracy, while trained analysts are excellent at interpretation and large-object classification — like buildings and sea vessels — there are changes that the eye can easily miss. "Algorithms comparing each new pass against the historical baseline — they catch those consistently, without fatigue," said Stoyanov.

Hybrid model

Francis Doumet is the CEO and co-founder of Metaspectral, a company based in Vancouver, British Columbia, that builds AI technology to rapidly analyze hyperspectral imagery.

Doumet views collaboration between different national space agencies as "extensive and, somewhat uniquely, very open." Missions are frequently carried out through "shared funding, instruments, expertise and ground infrastructure," he said, with the resulting scientific data made available internationally.

Commercial imagery is less openly distributed because it is commercially licensed and may have security implications, Doumet said, but it is increasingly enabling international cooperation in the defense sector.

For example, the U.S. Space Force's Tactical Surveillance, Reconnaissance and Tracking (TacSRT) program combines commercial satellite imagery and analytics from American companies and allied nations to rapidly respond to operational requests, Doumet said.

"This has shaped the Earth-observation sector into a hybrid model," said Doumet. Governments and allies share requirements and intelligence, he explained, while commercial operators supply imagery and analytics "at a speed and scale that would be difficult or impossible for a single nation to produce alone."

Hyperspectral sensors

The improvement in the spatial resolution of hyperspectral sensors is an important advance in Earth observation, Doumet pointed out.

Better sensors, high-speed compression and improved communications, such as optical links, are now narrowing a "resolution gap." Onboard AI is equally transformative, he added.

"Satellites can analyze imagery in real time, identify relevant signatures and transmit alerts or compact intelligence products instead of waiting to download an entire hyperspectral data cube," Doumet explained.

Spectral fingerprints

Angie Crews is a principal research associate with the University of Colorado, Boulder's Center for National Security Initiatives.

"There has been a tremendous growth in the commercial remote-sensing industry," Crews told Space.com, noting that this field had previously been government-based. "It's now possible for these commercial companies to deploy entire constellations of Earth-observing satellites, which fundamentally changes the architecture in place."

Crews pointed to the hyperspectral nature of Earth remote sensing — taking the "spectral fingerprints" of what's occurring on Earth.

"It's impressive how the industry is moving forward with some of these capabilities," she said.

Balancing act

"There are some tremendous benefits as well as some things that we need to think about" when it comes to the new direction that Earth observation is taking, Crews said. Remote-sensing data can be inherently dual use, she added.

"Overall, I think we're seeing some enormous benefits from our increasingly capable commercial remote-sensing systems. But it does raise some security and governance questions," said Crews.

It's a balancing act to manage, according to Crews. How best to secure the information for national security purposes versus not putting the squeeze on innovation exhibited by the private Earth-observation firms?

Meaningful information

Shifting to her teaching role at the University of Colorado, Boulder, Crews told Space.com that one of the things that's especially important is to train students in the remote-sensing field to think beyond any single sensor or dataset.

"The next generation needs to understand how different sensing technologies work and also how to work with very large datasets and extract meaningful information using AI and machine learning," Crews said.

"We also need to train the students on critical thinking and ensure they are aware of the limitations of AI. The underlying physics need to be understood and the results need to be validated so that the students use and interpret the results appropriately," she concluded.

The massive glaciers of Greenland are disappearing right before our very eyes in new satellite imagery.

What is it?

Petermann Glacier in northwest Greenland connects the Greenland ice sheet to the Arctic ocean. Petermann's "ice tongue" has previously measured 43 miles (70 kilometers) long and 9 miles (15 km) wide. But new satellite imagery has revealed the glacier's floating "ice tongue" has broken apart in the glacier's most dramatic loss of floating ice since 2012.

On August 4, 2026, the European Space Agency's Copernicus Sentinel-1 mission captured imagery of the glacier that revealed that a 29 square mile (76 square km) section of the ice tongue has broken away. This is the most significant ice calving event (where ice breaks off of a glacier) seen in the Arctic since 2020.

"Satellite missions such as Sentinel-1 provide the systematic, long-term observations needed to track these changes, helping scientists better understand the processes driving calving and the wider impacts on the polar environment, and ultimately the Earth system as a whole," ESA Earth scientist Martin Wearing said in a statement.

Why is it incredible?

It is no secret that worsening climate change is contributing to significant ice loss. Antarctica has lost 5,000 square miles (12,950 square km) of grounded ice over the last three decades. Warming oceans are consistently eroding the arctic ice we have left which, when melted, contributes to rising sea levels.

But knowledge is power, and by studying Earth from the vantage point of space, Earth scientists can gather critical information about our changing planet.

"By studying Arctic ice islands, we will gain knowledge that can be transferred across polar regions. This is critical for understanding how the calving and deterioration of ice islands impact glacier dynamics, sea-level rise and the ocean environment," Anna Crawford, a glaciologist at the University of Stirling, said in the same statement.

The "Eye of Africa" swirls across Mauritania in a hypnotizing snapshot captured from space.

What is it?

A 25-mile-wide (40 kilometer-wide) circular structure made up of concentric ridged rings sticks up from the Earth in Mauritania, a country on the coast of northwestern Africa. While it might look like an elaborate, hand-carved piece of artwork, it's actually a natural geologic feature.

Formally known as the Richat Structure and nicknamed the "Eye of Africa," this geologic formation can be seen clearly from space.

The first time this feature was seen from space was in 1965 when NASA astronauts Ed White and James McDivitt photographed it during the Gemini IV mission.

61 years later, NASA astronaut Jessica Meir has photographed the feature from aboard the International Space Station where she is working as part of Expedition 75.

Why is it incredible?

Meir shared the photo of the structure on social media along with other photographs from that region.

"The Richat Structure (or Eye of Africa) in Mauritania is photographed from above by many astronauts, but something about the lighting and coloring on this day captured my artistic eye. This palette and textures of this region of Africa scream pure Earth Art, at least in my brain!" Meir said in the post where she shared her photos.

Amazingly, because of its massive size, this geologic feature is perhaps most clearly seen from space. While astronauts aboard the ISS are orbiting our planet from hundreds of miles away, theit vantage point actually allows them to see the full, expansive circles that make up the "Eye of Africa." And while we've been seeing it from space since 1965, the view really never gets old.

Imagine orbiting hundreds of miles above Earth and seeing your home planet below — up in smoke.

That was the reality recently for astronauts aboard the International Space Station (ISS) who captured this image of the volcano Mount Rainier covered in smoke from nearby wildfires.

What is it?

This past July, hundreds of wildfires devastated a number of regions across Canada. But unfortunately, this was not the end of wildfires decimating North America this summer.

Recently, wildfires have spread across Washington and Oregon, burning over 84,000 acres (34,000 hectares) as of Aug. 12, according to NASA.

This image, captured by astronauts aboard the ISS, shows smoke blowing from wildfires in central and eastern Washington to the volcano Mount Rainier. The astronauts also captured imagery of Mt. Hood about 100 miles (160 kilometers) south. With Mt. Hood, you can also see thick plumes of smoke coming from the Grasshopper fire, which was ignited by a lightning strike.

Why is it incredible?

This is the worst fire season the Pacific Northwest has seen in over 30 years, CNN has reported. The wildfires have forced many to evacuate their homes, shut down major roads and more. In addition to the immediate dangers presented by the wildfires themselves, as we can see from these images, the smoke from the fires extends far and wide and has created unhealthy air quality levels.

As of Wednesday (Aug. 12), over 2.7 million acres (1.1 million hectares) had already burned, and by Friday (Aug. 14), the region still had dozens of uncontained wildfires, CNN reported.

And higher-than-normal risk for fires to continue through the month of August are expected, according to the National Interagency Fire Center.

While tackling the problem of wildfires — which is increasing as climate change worsens — takes place on Earth, we can learn a lot from seeing things from above. The vantage point of outer space allows for views like this, which can give a larger perspective. And satellite views can provide even more in-depth information to support wildfire fighting activities back on Earth.

NASA astronaut Anil Menon captured an incredible photograph of a swirling typhoon in the Pacific Ocean from the International Space Station on Aug. 2, 2026.

What is it?

According to his post on X sharing the image, Menon used an iPhone to capture the photo from the space station's cupola, a domed structure built by the European Space Agency that features six circumferential windows and central nadir viewing window.

The photograph shows a massive swirling typhoon in the Pacific Ocean. While Menon doesn't mention the storm or its location by name, it appears to be Super Typhoon Dolphin, the fifth tropical cyclone to reach category 5 in 2026. It has since been downgraded to a category 3 storm, and is expected to weaken to a category 1 or 2 as it continues to move westward towards Japan's Okinawa island.

Why is it incredible?

Aside from being a reminder of how powerful some storms on Earth can be, Menon's photograph shows just how far astronaut photography has come.

Even equipped with only a phone camera, astronauts can capture breathtaking photos to share with the world. On NASA's recent Artemis II mission around the moon and back, the four crewmembers beamed back incredible images captured with iPhones. They even sometimes used them as "mirrors" while shaving.

Menon's photo, like other space station photography, also drives home just how mind-boggling of an engineering feat the International Space Station (ISS) truly is.

There are currently seven people aboard the football-field-sized orbital laboratory, circling Earth every 90 minutes at a speed of 17,500 miles per hour (28,000 kilometers/hour) at an average altitude of around 250 miles (400 km).

Since 2000, the ISS has hosted international crews and has been the site of countless groundbreaking scientific experiments made possible by its microgravity environment. But the station is reaching the end of its life; NASA plans to retire it and crash it in into the Pacific Ocean around 2030.

The diets of penguins on Antarctica's Danger Islands can be seen from space. At least indirectly.

Using satellite images captured by the Landsat 8 spacecraft operated by NASA and the United States Geological Survey, scientists can track changes in Adélie penguins' diets based on the color of their guano, or droppings.

What is it?

The image above shows pinkish-orange guano staining large sections of some of the Danger Islands, Heroína Island and Beagle Island. The penguins that live there eat a diet rich in krill, small marine crustaceans that are bright pink in color due to a specific type of algae upon which they feed.

The bright pink color of the penguins' droppings stands out in satellite imagery, allowing researchers to monitor the birds' populations from space. But scientists wanted a closer look, and collected drone imagery as well, as seen in the image below.

Why is it incredible?

It's pretty amazing that the diet of a specific population of birds can be monitored from 438 miles (705 kilometers) above Earth's surface. The imagery collected by Landsat-8 helped scientists locate where the penguin colonies might be, allowing them to find them in-person and collect guano samples. Those samples contained evidence of what the penguins were eating over time.

Researchers are using those satellite images and samples to track how the penguins' diet might be affected by changes in sea ice conditions, according to a NASA statement.

"Sea ice is such a hugely important factor in the Antarctic marine environment," said Clemson University biologist Casey Youngflesh who led a study comparing the penguins' diet and sea ice conditions. "The structure of the region's food web is changing in response."

Radio telescopes are designed to listen for signals from the stars and from distant galaxies, but scientists are also pointing out that these instruments can also track objects somewhat closer to home: junk in Earth's orbit.

Engineers have used the famed radio telescope at Jodrell Bank in the U.K. as part of an international plan to watch high-altitude space debris. Normally, old satellites and bits of spacecraft stuck up in geostationary orbit are too high up for our normal ways of watching space debris. However, said international project, called Long Baseline Multistatic Radar (LBMR), successfully used a radio telescope to get around this problem.

"That's the first time that's ever been done," Simon Garrington, associate director of Jodrell Bank, said in a video about the project.

A pressing problem

It's hardly a secret that junk is rapidly piling up in Earth's orbit — dead satellites, rocket remnants, rubble from satellite collisions or anti-satellite missile tests, and more. And as we keep filling Earth's orbit with thousands more satellites each year, we're also increasing the risk that one is struck by a debris fragment. We need to track this debris.

Most satellites exist in low Earth orbit (LEO) below altitudes of 1,250 miles (2000 kilometers), and indeed space debris is more concentrated at LEO. Still, there’s good reason to be just as concerned about debris in the much higher geostationary orbit (GEO), which falls 22,500 miles (36,000 kilometers) in altitude. Crucial communications and weather satellites lie in GEO, for instance, and space debris doesn't need to come in great quantities to pose a threat — just one unfortunate strike can cripple a satellite.

This leaves debris-hawks with a conundrum. They typically track space junk in LEO with radar, but most ground-based radar systems aren't sensitive enough to watch GEO's heights. Instead, they rely on optical telescopes to see objects in GEO. These telescopes are good for tracking larger objects (larger than about 4 inches, or 10 centimeters, across), but they can't resolve smaller objects as well as radar can. Yet these smaller objects can be just as deadly and destructive as their larger counterparts. If we want to see them with radar, we'll need especially sensitive receivers.

Fortunately, that equipment already exists, too — that's where radio telescopes can help.

Engineers have tried debris-watching with radio telescopes as early as the 1990s, but LBMR, backed by NATO and the U.K. Space Agency, wanted to go further and watch debris in real time.

LBMR's engineers drew up a scheme to make this work. They would broadcast radio waves with a radar installation at the Massachusetts Institute of Technology's Lincoln Laboratory in the U.S. These radio waves would glance off debris and fall back into the dishes of U.K. radio telescopes such as the Lovell Telescope at Jodrell Bank. Back on the ground, the radio telescope's signal would be processed and analyzed in real time.

Aligning a radar transmitter with a radio telescope on the far side of an ocean, then processing its signals, is far easier said than done.

"This idea started about seven years ago. It sounded at that time like a crazy idea, because we had no synchronization. We had assets on one end of the ocean and other assets on the other end of the ocean," said Marco Martorella, an electronic engineer at the University of Birmingham and another member of LBMR, in a video. "But we were crazy enough to continue."

This required years of work, but the researchers have now successfully demonstrated that they can receive a signal with a single antenna. This has allowed them to track the distance to a piece of debris, and how quickly that distance is changing, in real time.

Next, the LBMR researchers hope to demonstrate that they can receive radar reflections of the same object with multiple radio telescopes at once. This, the researchers say, would allow debris-hawks to use the radio telescope technique to truly track debris in three dimensions.

In satellite data captured over Antarctica, what appears to be a beautiful, colorful hummingbird emerges from the crest of a mountaintop.

What is it?

While there are no hummingbirds flying around Antarctica, we can see what looks like a small, purple bird in a new satellite image of an Antarctic mountain. The dark belly of this "bird" at the center of this image is actually the top of the mountain Nunatak Zaterjavshijsja in East Antarctica.

What looks like a bird's tail is a stream of ice flowing northeast all the way out to the ocean, and what appear to be feathers splaying outward from the mountaintop are actually crevasses down the mountain. These crevasses are formed by a glacier fracturing the mountain's surface as it flows in the icy current toward the ocean.

This view was captured by radar instruments onboard the satellite NISAR (NASA-ISRO Synthetic Aperture Radar) that launched as a collaboration between NASA and ISRO (Indian Space Research Organisation). The director of NASA's Earth Science Division called NISAR "the most sophisticated radar we've ever built" in a pre-launch briefing last year.

Why is it incredible?

At first glance, this image is puzzling. What could it possibly be? Its bold colors and sharp lines evoke almost alien qualities. But the strange beauty of the shapes and colors in this satellite image reveal important information about glacier movements on the mountain.

"First, it's a beautiful image, with rich details of features that provide insights to how the glacier is moving. Then, because radar can often see through snow and deep into the ice, NISAR can observe fundamentally different properties of Antarctic ice than can be seen in optical imagery," Seongsu Jeong, the signal analysis engineer who produced the image at NASA's Jet Propulsion Laboratory, said in a statement. "With NISAR we're seeing what's hidden beneath the surface."

And now anyone can explore NISAR's data. Earlier this week, on July 20, NISAR started making the data from its radar instruments public. Moving forward, mission teams will be rolling out this data so researchers everywhere can use it to study and protect our ever-changing planet.

An amateur astronomer's plans for a camping vacation two years ago transformed into a possible crater find in Canada's north.

Amateur astronomer Joël Lapointe, using Google Maps to figure out his route for the 2024 vacation, saw some odd terrain in Quebec's Côte-Nord region centered on Lake Marsal. Lapointe suspected it was an impact crater from a meteorite, and made a report on Impact Earth — a crowdsourcing website for craters with Canada's Western University in London, Ontario near Toronto. Western planetary geologist Gordon Osinski made a visit to the region in 2025, provisionally not only confirming the crater, but saying it's probably one of the biggest discovered in recent years. The 390-million-year old feature is roughly 15 miles (25 kilometers) wide.

In an email interview with Space.com while on travel in Scotland, Osinski — known as "Oz" by the space community — said to his knowledge the last discovery of that scale was the approximately 31-km (19-mile) Hiawatha structure, also possibly a crater, spotted in Greenland in 2018. "However, that structure is completely buried by ice, so its diameter is uncertain and there is still some controversy about its origin," Oz said.

But in the case of the new crater, called Uhackatik with approval from the Innu Council of Ekuanitshit in whose traditional lands the crater lies, there is no doubt at all where the crater came from. Oz's expedition to the area revealed "shock metamorphic effects", which are deformations to the rocks induced by the shock waves and heating produced by a meteorite impact.

"Impact melt rocks are like they sound: large volumes of rock that are melted by the impact event, but then cool and crystallize to look a lot like volcanic rocks," he said. "Finding these preserved — as they are usually some of the first parts of a crater to be eroded — was a big surprise."

While most of the features are microscopic, Oz said in the field he and his collaborators could easily see "shatter cones", which are branching features in rock layers produced by the shockwave of impact. The research is not yet peer-reviewed, but it will be presented at the 88th Annual Meeting of the Meteoritical Society in Frankfurt, Germany in August.

While 400-million-year-old impact craters on Earth are hard to find, as geologic activity as well as erosion change their features over time, the precious evidence is helpful for scientists to better understand meteorite impacts on the moon, Mars and other rocky extraterrestrial bodies.

In terms of age, Oz noted, the moon's prominent Tycho crater best represents what Uhackatik probably looked like 390 million years ago. But On Earth, one of the best comparisons to Uhackatik is a moon-like crater used to help the Artemis II astronauts get ready for their moon mission this year.

That Earth crater is called Kamestastin (also known as Mistastin) in northern Labrador, Canada. Oz regularly runs expeditions there in consultation with the Mushuau Innu First Nation, as the crater lies within their traditional hunting grounds. Kamestastin includes anorthosite, a common mineral found in craters at the moon's south pole, where NASA hopes to land astronauts under the US-led Artemis program.

Artemis II astronauts Jeremy Hansen (from the Canadian Space Agency or CSA) and Christina Koch (NASA), as well as CSA backup astronaut and lunar-flyby capcom Jenni Gibbons, did an expedition to Kamestastin crater in 2023 alongside Oz and collaborators.

"For comparative craters [to Uhackatik], Kamestastin is actually a great one as the size is very similar," Oz said. "Kamestastin is well-preserved and I've worked there a lot … so in my mind, I was using Kamestastin as a template for exploring this new potential crater."

To fully confirm Uhackatik's extraterrestrial origin, Oz and collaborators are examining samples microscopically for more evidence of shock effects, such as chemistry indicating a high-temperature melt, or deformation effects in the quartz. In the meantime, Oz's lunar work with NASA continues: he will be part of the geology teams supporting the moon-landing astronauts during the Artemis 4 and 5 missions, which will touch down as soon as 2028.

The wildfires tearing across Canada are so extreme that the smoke billowing upward can be seen from space.

What is it?

Over 850 wildfires are currently devastating Canada, as reported by the Canadian Interagency Forest Fire Center. The fires are spreading across Manitoba, Saskatchewan and Ontario; most remain completely uncontrolled.

In addition to the immense destruction caused by the fires themselves, the smoke from these fires is causing serious concerns about dangerously poor air quality all across Canada and even in the northeastern United States. As far as New York, the air quality on Thursday (July 16) was labeled "very unhealthy" after the state activated emergency air quality protocols.

The smoke is so expansive it's clearly visible in this image captured on July 14 from Earth orbit.

Why is it noteworthy?

Studying wildfires and wildfire smoke from orbit can give us a bigger picture view of these catastrophic event. This data is important for disaster relief in the short term — but also in the long-term. With climate change continuing to progress due to human activities like burning coal for cheap power, we can expect natural disasters to worsen. Among the many effects of climate change, this includes longer and more intense wildfire seasons, especially in regions that are already susceptible to fire such as these regions across Canada.

The new image was captured by the NOAA-21 satellite with the instrument VIIRS (Visible Infrared Imagine Radiometer Suite). You can see massive plumes of smoke over southeastern Canada treading into the northeastern U.S. Thick smoke covers swaths of Canada's landscape and wisps of smoke trail all the way down through New York and across the U.S.

Most of this smoke, at least the smoke we can see in this satellite image, is coming from wildfires in northwestern Ontario. As the wildfires continue to burn, satellites like NOAA-21 will be keeping watch.