Rare Black Moon coming August 22-23! Why so special?

We'll have a Black Moon on August 22-23, 2025. A Black Moon is a special kind of new moon. Learn more about Black Moons here.

Blazing daylight fireball reported over U.S. Southeast!

Several reports were posted on social media of a rare daylight fireball that was seen over several southern states in the U.S. on June 26, 2025.

What’s your personal solstice? Images and stories from our community here

The solstice is a whole-Earth event. Enjoy these June solstice stories and images from the EarthSky community. And happy solstice!

What makes oddly shaped suns and moons on the horizon?

When light from the sun or the moon travels through more atmosphere to your eyes, you see oddly shaped suns or moons in interesting and beautiful ways.

A deep partial solar eclipse on March 29. Watch here.

Watch the deep partial solar eclipse on Saturday, March 29, 2025, at EarthSky. Or join our expert eclipse watchers for more.

A superb Venus inferior conjunction by Guy Ottewell

Venus will pass between Earth and the sun on March 22-23. You might be able to see Venus in both the morning and evening twilight for a few days before then.

Total lunar eclipse of Full Worm Moon tonight, March 13-14!

Overnight on March 13-14, 2025, there will be a total lunar eclipse of the March Full Worm Moon visible from the Western Hemisphere.

The ecliptic is the path of the sun

The ecliptic is an imaginary line that marks the path of the sun. You can also find the planets and moon near this line, tracing the plane of our solar system.

Stellar luminosity versus star brightness

Some extremely large and hot stars blaze away with the stellar luminosity of a million suns! But other stars look bright only because they're near Earth.

What is a variable star?

What is a variable star? It's a star that brightens and dim in a cycle that might last hours, or weeks, or months, or longer. Astronomers know millions!