EarthSky | Updates on your cosmos and world

Seeing Saturn’s rings: Top tips for beginners

September 25, 2026

Sun news: Fast wind arrives, auroras up north

Sun news September 25, 2026: Fast solar wind arrived, stirring Kp 4 and high-latitude auroras. Meanwhile, AR4536 just grew a delta. Stay tuned!

C. Alex Young

September 25, 2026

Today's Image

The red planet shows strange swirls of purple and pink

Mars Express captured this view of the red planet showing it in less familiar purple, pink and blue shades. Read why the red planet looks purplish.

Kelly Kizer Whitt

September 24, 2026

Space

Curiosity rover insights after 5000+ sols on Mars

Curiosity rover has now spent 5,000 sols — the equivalent to 5,000 Martian days, or more than 14 years — on Mars. Here's a look at some of its discoveries.

Kelly Kizer Whitt

Deborah Byrd

September 24, 2026

Earth

Would a Yellowstone supervolcano eruption end humanity now?

Yellowstone has undergone 3 massive super-eruptions in the past. If the Yellowstone supervolcano erupted today, would humanity survive?

EarthSky Voices

September 24, 2026

Astronomy Essentials

Tonight

Visible planets and night sky guide for September and October

Visible planets and night sky guide: Watch for the Harvest Moon this weekend. And see a video here about Harvest Moon science and folklore.

September 24, 2026

Full moon names by the month and by the season

Lists of common full moon names — both by month and by season — for North America. And a word about full moon names in the Southern Hemisphere.

Editors of EarthSky

September 24, 2026

Tonight

Why can’t I find the Big Dipper in September?

On northern autumn evenings, the famous Big Dipper lies low on - or even below - the northern horizon. You can use it to find Polaris, the North Star.

Larry Sessions

September 24, 2026

Space

Baby exoplanet: Astronomers find the youngest world yet

Astronomers have discovered the youngest-known exoplanet so far, Elias 2-24 b. The baby exoplanet is twice the mass of Jupiter and 450 light-years away.

Paul Scott Anderson

September 23, 2026

Earth

Hurricane Polo will come ashore next week

Hurricane Polo has been churning off the coast of Mexico. But forecasters say it will come ashore early next week, with remnants spreading into the U.S.

Kelly Kizer Whitt

September 23, 2026

Human World

Neptune discovered on this date 180 years ago

Read the fascinating story of the discovery of Neptune - 180 years ago - on September 23, 1846. It was the 1st planet to be discovered by using mathematics.

EarthSky Voices

September 23, 2026