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UNBELIEVABLE: 23 | History Defined

NASA is making a powerful new ion engine to send astronauts to Mars — and it just passed its 1st test

A prototype ion engine that uses lithium metal vapor as a propellant has aced its first tests, achieving 25 times more power than the ion engine on the Psyche mission.

Space

NASA wants to land astronauts on the moon in 2028. Will SpaceX's Starship or Blue Origin's Blue Moon lander be ready in time?

After Artemis 2, NASA's moon return hinges on two unproven commercial landers, each of which faces major technical and timeline challenges.

Space

Trump's proposed NASA budget is a 'horrible threat to our future' in space, Planetary Society CEO says

In conversation with Space.com, the new Planetary Society CEO talked about the fight to restore NASA's funding again 2027.

Space

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James Webb Space Telescope directly studies an exoplanet's surface for the 1st time: 'We see a dark, hot, barren rock'

Astronomers using the James Webb Space Telescope have directly analyzed the surface of a distant super-Earth, revealing a dark, airless, Mercury-like world.

Space

Watch the Eta Aquarid meteor shower 2026 online tonight with these livestreams

Watch Eta Aquarid meteors streak across the sky live from observatories and sky cams around the world.

Space

Are streamers losing faith in legacy sci-fi franchises?

Does the cancellation of 'Starfleet Academy' suggest that lean times are ahead for 'Star Trek' and 'Star Wars'?

Space

Will the moon ruin the Eta Aquarid meteor shower this week? Here's what to know

A bright waning gibbous moon may wash out this week's Eta Aquarid meteor shower peak — but early risers could still catch a few shooting stars.

Space

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Our Milky Way's 'Zone of Avoidance' holds a galaxy supercluster with 30,000 trillion times the sun's mass

The Vela Supercluster, in our Milky Way's Zone of Avoidance, is competing gravitationally with other superclusters for the attention of local galaxies.

Space

Lasers take aim at a galaxy far, far away | Space photo of the day for May 4, 2026

Looking like a scene out of "Star Wars," this image shows the ESO's Very Large Telescope Interferometer (VLTI) beaming four separate lasers into the sky towards the Tarantula Nebula.

Space

What's the best time to see Eta Aquarid meteors tonight?

The Eta Aquarid meteor shower peaks this week, but will you be able to see it?

Space

A YouTuber just recreated the original Star Wars with cardboard, and it's awesome (video)

Star Wars superfan and YouTube sensation Zach King recreates the seminal 1977 sci-fi film using cardboard.

Space

13 International 'Star Wars' Posters You've Likely Never Seen

From Japan to Turkey, celebrate Star Wars Day with this global collection of original trilogy posters.

Space

Why were galaxies so active in the early universe? We may be getting close to the answer

Early galaxies were star-forming machines, gobbling up gas and spitting out stars with a furious intensity. A new model helps explain why things were so different back then.

Space

'It was quite a light show!' NASA astronaut spies dramatic fireball from the International Space Station (photos)

NASA astronaut Chris Williams photographed a fireball from above recently, capturing the stunning site from aboard the International Space Station.

Space

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Space

Spaceflight is hard on the heart, yet artificial ones grow better in space than on Earth

The human heart shrivels away in space, but researchers have found that mini-hearts grown from human stem cells sprout in space significantly faster than in labs on Earth.

Space

Why do some stars become 'supernova impostors'? Astronomers still don't quite know

Astronomers call this "eruptive mass loss," and it's a stellar drama we're still trying to fully grasp.

Space

SpaceX sends 45 satellites to orbit in nighttime launch from California (video)

SpaceX launched 45 satellites to orbit from California early Sunday morning (May 3), including a South Korean spacecraft that was originally supposed to fly in 2022.

Space

This Week In Space podcast: Episode 208 — Lander, Lander, Who's Got a Lander

On Episode 208 of This Week In Space, Rod Pyle and Tariq Malik talk with Space.com's Mike Wall about the risks and realities of the new space race to the moon.

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Space

Best sci-fi thriller movies of all time, ranked

You know it's thriller, thriller night

Space

Galaxies, Artemis 2, space telescopes and stormtroopers: Here are the best photos from our staff

Photos from around the space team.

Space

See May's full 'Flower Moon' bloom in gorgeous photos from around the world

The Flower Moon will be followed by a rare full Blue Moon on May 31.

Space

3 planets will put on a sky show in May — when and how to see them

Venus, Jupiter and Mercury headline May's skywatching, with stunning moon pairings and a three-planet display.

Space

The Eta Aquarid meteor shower peaks next week: Here's what you need to know

Shooting stars and the occasional fireball may be seen whenever the constellation Aquarius is above the horizon.

Space

Artemis 2 astronauts get the star treatment after historic moon trip

They didn't get a parade, but they're certainly being paraded on the big networks.

Space

Drone radar could help spacecraft pinpoint where to drill for water on Mars, scientists say

Drone-mounted radar flown over glaciers on Earth show how the technology can map buried ice in detail, helping future Mars spacecraft choose exactly where to drill.

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