Ancient volcanoes on Mars were diverse
Researchers in China and the U.S. said ancient active volcanoes on Mars were more diverse than previously known, despite a lack of plate tectonics.
Did passing stars change Earth’s orbit?
We long suspected that passing stars are what send distant comets sunward. But could passing stars also change Earth's orbit? A recent study says yes.
Human World

How astronauts to Mars can manage stress on the long journey

Astronauts headed to Mars will live and work in confinement for more than two years. Here are ways to manage these stressful conditions.
Astronomy Essentials

42 days to total solar eclipse. Edmond Halley’s eclipse

We're counting down to the April 8, 2024, total solar eclipse, which will cross North America. See the story of Edmond Halley's eclipse prediction.
Astronomy Essentials

Visible planets and night sky for February and March

Visible planets in February and March. Look now to see the zodiacal light - a faint, hazy pyramid of light extending from the horizon - after evening twilight.

Cumulus clouds disappear quickly during a solar eclipse

New research out of the Netherlands says that cumulus clouds disappear quickly during a solar eclipse as air temperatures drop. Good news for eclipse chasers!

Star clouds in the Milky Way are doing the wave

Star clouds peppered with stellar nurseries form a huge, wave-like structure in the Local Arm of our galaxy. And now astronomers discovered its doing the wave.
Astronomy Essentials

Zodiacal light best in dark skies around the March equinox

The zodiacal light is an eerie light extending up from the horizon. During the months around the March equinox is a good time to see it. How to see it, here.
Today's Image

Venus and Mars closest on February 21 and 22, 2024

Venus and Mars were closest on February 21 and 22. Did you miss them? Don't worry, we compiled a gallery of EarthSky community photos, showing this cosmic duo.

Lunar lander Odysseus alive and well but is on its side

The Intuitive Machines IM-1 lunar lander - nicknamed Odie - landed on the moon yesterday, February 22, 2024. On Friday evening, controllers said the lander is on its side.