Was the Red Planet once blue? New evidence points to an ancient ocean on Mars
Ancient shoreline features hint that water on Mars once formed a vast ocean.
This is the sharpest view ever seen of a black hole’s dusty disk
"Instead of Webb's 6.5-meter diameter, it's like we are observing this region with a 13-meter space telescope."
Sun unleashes powerful X-flare, CME hits Earth sparking severe geomagnetic storm
Aurora alert! The colossal solar storm could impact and trigger impressive northern lights.
Astronomers discover an enormous iron bar in the famous Ring Nebula: ‘We definitely need to know more’
"One thing popped out as clear as anything, this previously unknown 'bar' of ionized iron atoms, in the middle of the familiar and iconic ring."
Does antimatter ‘fall up’?
We need to talk about antimatter.
What is below Earth, since space is present in every direction?
When my colleagues and I send them out to explore our solar system, it's important for us to understand the 3D map of our space neighborhood.
Hubble Telescope watches star blast out jet of hot gas 32 light-years long
The protostar is launching the longest outburst ever seen at 32 light-years long.
Space.com headlines crossword quiz for week of Jan. 12, 2026: What is an Einstein-Rosen bridge more commonly known as?
Test your space smarts with our weekly crossword challenge, crafted from Space.com's biggest headlines.
Jupiter has more oxygen than the sun, new simulations reveal
Jupiter harbors more oxygen than the sun, a new study finds, giving astronomers a crucial clue about how our solar system's planets formed.
Hubble Telescope sees baby stars hard at work | Space photo of the day for Jan. 16, 2025
Ba-by stars, doo doo doo doo doo doo.