Posts by 

Kelly Kizer Whitt

New nova in Centaurus might be visible to the unaided eye

It appears there's a new nova - or guest star - in the southern constellation of Centaurus. The nova could be visible with your eyes alone from a dark-sky site.

Stunning moon, Venus and Regulus conjunction pics !

The EarthSky community outdid itself with these photos of the crescent moon, Venus and Regulus in the morning sky on Friday, September 19, 2025.

Astronomers propose Planet Y in depths of solar system

A team of astronomers discovered that some of the distant Kuiper belt objects have warped orbits. The best explanation they found for this is a Planet Y.

Mount St. Helens is not erupting, USGS reassures public

Mount St. Helens is not erupting. On September 16, 2025, locals saw a ghost of the 1980 eruption as strong winds blew old ash into the air.

Tiny asteroid 2025 RJ2 makes close flyby of moon and Earth

A tiny asteroid made a close pass by Earth and an even closer pass by the moon yesterday and earlier this morning. It posed no threat to us.

International Cloud Appreciation Day is September 12

The international Cloud Appreciation Day is September 12, 2025. Learn how to participate here and see a gallery of beautiful clouds.

NASA announces Mars rock as a potential biosignature

NASA said at a press conference on September 10, 2025, that a Mars rock explored by the Perseverance rover is a potential biosignature.

Cepheus the King: The constellation that looks like a house

The constellation Cepheus the King is visible from the Northern Hemisphere every night of the year due to its close location to Polaris, the North Star.

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.

Meet Pismis 24, a glittering hotbed of star birth

NASA has released an incredible image of Pismis 24, a sparkling cluster of star formation. It's one of the nearest sites of massive star birth.