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Astronomy Essentials
Tonight
Visible planets and night sky guide for September
Visible planets and night sky guide: Venus reaches its brightest in the sky this week. Look west this evening to see the crescent moon near brilliant Venus.
September 13, 2026
Space
Alien tech on the moon? Scientists propose search for microscopic debris
Could there be alien tech on the moon? Scientists propose a new search for microscopic particles shed by alien technology.
September 13, 2026
Astronomy Essentials
See Venus in the daytime: Here are 3 tips
You can spot Venus in the daytime. One of the best ways is when its near the moon. Here are 3 tips to help you spot the brilliant planet Venus in daylight.
September 13, 2026
Sun
Sun news: Huge coronal holes take center stage
Sun news September 13, 2026: Two coronal hole streams are set to enhance geomagnetic activity through September 15, with G1 storm intervals possible.
September 13, 2026
Earth
Crepuscular rays are sunrays in twilight skies
Crepuscular rays form around twilight when particles in the atmosphere reflect the sun's light beams toward our eyes. See photos of the phenomenon here.
September 13, 2026
Today's Image
Does this Mars image show an alien in a hallway?
What do you see in the Mars image? Some people think the rocks look like a hallway where a little alien is walking. Other instances of pareidolia, here.
September 12, 2026
Earth
Atlantic hurricane season sets a record: No hurricanes yet!
The 2026 Atlantic hurricane season has set a record. It's the longest we've ever gone in a hurricane season without seeing a hurricane. Read more here.
September 12, 2026
Space
Did the sun swallow a planet early in its history?
Did the sun swallow a planet early in its history? Models show a super-Earth might have spiraled into the sun and left a fingerprint we can still see today.
September 11, 2026
Space
Distant proto-supercluster! An early intersection point in the cosmic web?
Astronomers have found the most distant proto-supercluster yet, an early collection of galaxies at a junction in the cosmic web.
September 11, 2026
Earth
International Cloud Appreciation Day is September 11
The international Cloud Appreciation Day is September 11, 2026. Learn how to participate here and see a gallery of beautiful clouds.
September 11, 2026
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