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Astronomy Essentials
Tonight
Visible planets and night sky guide for September
Visible planets and night sky guide. Did you see Sunday's total lunar eclipse? If not, here are some great shots for you to enjoy!
September 9, 2025
Space
Meet Earth’s newest quasi-moon, recently discovered 2025 PN7
Earth has a newly discovered quasi-moon! The little space rock 2025 PN7 shares an orbit with Earth and appears to orbit our planet.
September 9, 2025
Earth
Sun
Sun news: See the solar cycle’s decline in new data
Sun news September 9, 2025. NOAA’s August sunspot numbers show Solar Cycle 25 is trending downward after last year's solar maximum.
September 9, 2025
Earth
Meet the snow leopard: the ghost of the mountains
The snow leopard is almost invisible in the snow. Its amazing camouflage has led people to call it the "ghost of the mountains."
September 8, 2025
Space
Life around white dwarfs? Astronomers think it’s possible
An astronomer explores the possibility of life around white dwarfs, stars as small as Earth but far denser that may host habitable zones and planets with water.
September 7, 2025
Today's Image
Interstellar comet 3I/ATLAS shows comet tail in new image
Astronomers captured images live from the Gemini South telescope control room in Chile, and they showed a comet tail for 3I/ATLAS.
September 7, 2025
Astronomy Essentials
Saturn’s rings: Top tips for beginners
If you want to see Saturn's rings, September 2025 is a great time to look. Grab a telescope, find a dark sky and read the tips found here!
September 7, 2025
Space
Mystery of fastest white dwarfs solved?
Astronomers have identified why the fastest white dwarfs in the Milky Way are so speedy. They are ejected by supernova explosions after 2 white dwarfs collide.
September 7, 2025
Astronomy Essentials
Total lunar eclipse of the full Corn Moon September 7, 2025
Overnight on September 7, 2025, there will be a total lunar eclipse of the September full Corn Moon visible from the Eastern Hemisphere.
September 6, 2025
Space
Is Earendel the most distant star? Or a star cluster?
A new study using the James Webb Space Telescope shows that Earendel - thought to be the most distant star known - might be a cluster of stars.
September 5, 2025
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