EarthSky | Updates on your cosmos and world

Venus had a moon for nearly 2 billion years, scientists say

September 15, 2026

Mercury is shrinking up to 30% more than expected

A new study shows Mercury is shrinking more than scientists first thought. They say the planet might have already shrunk up to 30% more than expected.

Kelly Kizer Whitt

September 15, 2026

Sun

Sun news: Chunk of sun-stuff on its way to Earth

Sun news September 15, 2026: A filament eruption sent a coronal mass ejection toward Earth, due September 17. Minor geomagnetic storms are possible.

September 15, 2026

Visible planets and night sky guide for September

Visible planets and night sky guide: Shortly after sunset tonight, look for the young moon between blazing Venus and the bright red star Antares in Scorpius.

September 15, 2026

Venus brightest in the evening sky this week

See Venus brightest in the evening sky this week, with greatest brilliancy coming around September 18, 2026. Look west after sunset.

Editors of EarthSky

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.

Paul Scott Anderson

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.

Editors of EarthSky

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.

Editors of EarthSky

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.

Kelly Kizer Whitt

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.

Kelly Kizer Whitt

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.

Kelly Kizer Whitt

September 11, 2026