Meet ASTRID, the New High-Resolution Cosmological Simulation
The ASTRID cosmological simulation has run from the Universe’s early days up to the present day, z=0. ASTRID is larger than some other simulations, and smaller than others. But with…
What’s Up: September 2026 Skywatching Tips from NASA
Skywatching Skywatching Home What’s Up Meteor Showers Eclipses Daily Moon Guide More Tips & Guides Skywatching FAQ Night Sky Network Brilliant Venus and a Harvest Moon Use the Moon to…
The 12 best sci-fi movies of the 2000s
At the turn of the century, sci-fi evolved to new heights, which fortunately had nothing to do with Y2K (even if previous sci-fi movies might have led us to believe…
Historic Engines Take Their Place on Artemis III
NASA/Clayton Rougelot On Aug. 24, technicians at NASA’s Kennedy Space Center in Florida began installing the four RS‑25 engines in the core stage of the agency’s Space Launch System (SLS)…
On this day in space! Sept. 1, 1979: NASA’s Pioneer 11 probe becomes 1st spacecraft to visit Saturn
On Sept. 1, 1979, NASA’s robotic space probe Pioneer 11 became the first spacecraft to fly by Saturn. Pioneer 11 launched in 1973 on a mission to explore the asteroid…
Scientists Model the True Darkness of Venus’s Mysterious UV Absorber
As any amateur astronomer can tell you, Venus is famous for its yellow coloration in visible light. But, ask a professional planetary scientist and they will tell you the strangest…
APOD: 2026 August 31 – Launch of the Roman Space Telescope
APOD Science APOD APOD: 2026 August 31 –… Today’s APOD Archive Submissions Index Search Calendar RSS Education About Discuss APOD Astronomy Picture of the Day Discover the cosmos! Each day…
Quantum Physicist Takes Aim at the Universe’s Mysterious Arrow of Time
Scientists and philosophers have argued over the nature of time since … well, since time immemorial. Is time real, or is it a convenient illusion? Why does time seem to…
NASA Welcomes Türkiye as Newest Artemis Accords Signatory
Turkish Minister of Industry and Technology, Mehmet Fatih Kacır, 3rd from left, signs the Artemis Accords for the Republic of Türkiye as NASA Administrator Jared Isaacman, left, U.S. Deputy Assistant…
NASA’s doomed Swift space telescope restarts science work after rescue mission fails
NASA’s Neil Gehrels Swift Observatory is back to studying the universe after spending months in a low-drag configuration while awaiting an orbital rescue mission that ultimately fell short. Mission controllers…