This Is the Worst Thing That Could Happen to the International Space Station
There’s a good way to throw out the ISS. And then there’s a really bad way.
NASA Delays Launch of Artemis II Lunar Mission Once Again
A failure in the helium flow of the SLS rocket has prompted NASA to delay the Artemis II moon mission. Rather than March 6, the launch is now targeted for April.
How to View the ‘Blood Moon’ Total Lunar Eclipse on March 3
Next month, the Earth will come between the sun and the moon, causing the moon to take on an eerie reddish hue.
A Galaxy Composed Almost Entirely of Dark Matter Has Been Confirmed
What scientists thought were four separate star clusters are actually part of one nearly invisible system.
Astronomers Are Closing In on the Kuiper Belt’s Secrets
As next-generation telescopes map this outer frontier, astronomers are bracing for discoveries that could reveal hidden planets, strange structures, and clues to the solar system’s chaotic youth.
This Startup Thinks It Can Make Rocket Fuel From Water. Stop Laughing
General Galactic, cofounded by a former SpaceX engineer, plans to test its water-based propellant this fall. If successful, it could help usher in a new era of space travel. That's a big “if.”
Why the Artemis II Crew Stays in Quarantine Before Their Journey to Moon
For two weeks, medical experts monitor the astronauts as they remain indoors, live in isolation, and avoid physical touch, all to prevent harmful microbes from traveling to space.
The Search for Alien Artifacts Is Coming Into Focus
From surveys of the pre-Sputnik skies to analysis of interstellar visitors, scientists are rethinking how and where to look for physical traces of alien technology.
Trump Declared a Space Race With China. The US Is Losing
If you want to put people back on the moon, don’t gut the agency in charge of getting them there.
The Longest Solar Eclipse for 100 Years Is Coming. Don’t Miss It
NASA has announced when the longest total solar eclipse of the century will occur—and you won’t have to wait long. Here’s what you should know.