How compact can a neutron star get before collapsing into a black hole?
This new analysis could be used to test the physics of quantum chromodynamics in the future.
Skywatching
Best smart binoculars 2025: Learn, share and be guided around the night sky
Buying Guide Smart binoculars are a new technology, but are they worth getting in on? We've rounded up the best.
MORE FROM SPACE...
Spaceflight
Australia's Gilmour Space 'not going to give up' as it eyes 2nd orbital launch attempt in 2026
After a short-lived maiden flight in late July, Australia's Gilmour Space is rebuilding for a second orbital attempt and a stronger domestic launch ecosystem.
On this day in space! Oct. 24, 1946: V-2 rocket takes 1st photos of Earth from space
On October 24, 1946, a V-2 rocket captured the first-ever photo of Earth from space.
SpaceX launches its record-breaking 139th mission of the year (video)
SpaceX launched its record-setting 139th mission of the year today (Oct. 23), sending a Spanish military-communications satellite to orbit.
Science & Astronomy
Milky Way dazzles over Vera Rubin Observatory | Space photo of the day for Oct. 24, 2025
Perched high in Chile's Andes, the Vera C. Rubin Observatory sees a breathtaking view of the Milky Way's southern arc.
What is the moon phase today? Lunar phases 2025
Reference See what moon phase it is tonight and find out when you can see the rest of the moon phases for 2025.
Entertainment
Fallout games in order: Chronological and release date
No one wants to set the world on fire, but Fallout’s post-apocalyptic world is a fun one to explore. Here’s how to get through the entire series in order.
Neil deGrasse Tyson on his new book and the hidden dangers of defunding science: 'That will ultimately bite you in the ass' (exclusive)
We spoke with Neil deGrasse Tyson about his new Q&A book "Just Visiting This Planet: Further Scientific Adventures of Merlin From Omniscia" arriving on Oct. 21, 2025.
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Northern lights - live updates
The latest aurora forecast for tonight help you make sure you're in the right place at the right time to see the northern lights.
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Rocket launch today
Follow Space.com's rocket launch blog for the latest on when the next rocket launch will be and how to follow it live.
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Night sky for tonight
Find out what you can see in the night sky for tonight, from planets and stars to dazzling meteor showers.
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Live 4K video from space!
Witness live views of Earth from the International Space Station as it orbits the planet. Space streaming company Sen is broadcasting 24/7 from the ISS in beautiful 4K HD.
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On this day in space!
NASA astronaut Sally Ride became the first American woman in space aboard the space shuttle Challenger.
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ReferenceWhat is the moon phase today?
See what moon phase it is tonight and find out when you can see the rest of the moon phases for 2025.
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ReferenceSpace calendar 2025
Keep up with all the rocket launches, astronomical events and mission milestones for 2025 with our space calendar.
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Search For Life
How excited should we be about the latest Mars potential biosignature discovery? 'It's arguably the best evidence we have so far'
What about those previously studied plumes of methane and meteorites potentially stuffed with the fossils of Martian microbes?
No near neighbors: Closest technologically advanced aliens may be 33,000 light-years from Earth
A new study suggests that, without plate tectonics and the right balance of carbon dioxide and oxygen, advanced alien civilizations may be exceedingly rare.
Could a Mars crater have once hosted life? NASA's Perseverance rover finds more evidence it's possible
Fresh analysis of Perseverance rover data reveals Jezero Crater experienced repeated episodes of water activity, strengthening the case for habitability and raising the stakes for Mars Sample Return.
Technology
Powerful NVIDIA chip launching to orbit next month to pave way for space-based data centers
An NVIDIA GPU is heading toward its record-setting orbital debut, a trip that will test how data centers could work in the final frontier.
