On this day in space! Sept. 17, 1789: Astronomer William Herschel discovers Saturn's 'Death Star' moon Mimas
On Sept. 17, 1789, the British astronomer William Herschel discovered Saturn's "Death Star" moon, Mimas. Here's why it mattered.
Skywatching
You can order the new Seestar S50 Pro right now for $999
Deals Get the latest release from ZWO, the Seestar S50 Pro. It has upgraded optics, dual 8MP sensors and more battery life than its predecessor.
Total solar eclipse 2027 — Everything you need to know about the 'eclipse of the century'
Reference Discover the 'eclipse of the century' with this comprehensive total solar eclipse 2027 guide. Find out where to see it, the timings of totality and possible weather conditions for key locations.
Spaceflight
Star Trek actors welcomed the Space Shuttle Enterprise 50 years ago today | Space photo of the day for Sept. 17, 2026
This was a seriously iconic lineup.
SpaceX launches 2nd classified mission for US Space Force in less than a week (video, photos)
SpaceX launched its second classified mission for the U.S. Space Force in less than a week tonight (Sept. 16).
SpaceX Falcon 9 rocket-landing team gets 1st-ever Neil Armstrong Space Prize
The SpaceX Falcon 9 Booster Landing Team received the first-ever Neil Armstrong Space Prize during a ceremony in Washington, D.C. on Tuesday night (Sept. 15).
Science & Astronomy
What is the moon phase today? Lunar phases 2026
Reference See what moon phase it is tonight and find out when you can see the rest of the moon phases for 2026.
Roman Space Telescope starts waking up as NASA powers on instruments for the 1st time
Roman is still traveling to its final destination in space and slowly powering all its devices.
Space Photo of the Day
Star Trek actors welcomed the Space Shuttle Enterprise 50 years ago today | Space photo of the day for Sept. 17, 2026
This was a seriously iconic lineup.
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Northern lights - live updatesThe 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 todayFollow 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 tonightFind 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 2025Keep up with all the rocket launches, astronomical events and mission milestones for 2025 with our space calendar.
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Search For Life
Microscopic alien technology may be hidden in moon dust, scientists say
Could we find alien technology embedded in moon dust?
Technology
The battlefield now extends all the way to the moon, U.S. military's highest-ranking officer says
The battlefield that the U.S. military must prepare for and excel in now extends from the seafloor all the way out to the moon, according to Gen. Dan Caine, chairman of the Joint Chiefs of Staff.
