Posts by 

Editors of EarthSky

Earliest sunrises (or sunsets) come before June solstice

If you live in the Northern Hemisphere, your earliest sunrises of the year are happening around now. Southern Hemisphere? Your earliest sunsets are around now.

Meteor shower guide: Next up, summer meteors

Your meteor shower guide for 2022 and early 2023. There are some good ones! Next up ... the Delta Aquariids and the Perseids in late July and August.

Fireflies: How and why they light up

A firefly's familiar glow is caused by a chemical reaction. Why and how fireflies light up here, plus many wonderful firefly photos.

Constellations and signs: what’s the difference?

What is the difference between signs of the zodiac and constellations of the zodiac? Astronomer Guy Ottewell illustrates and discusses this difference.

Hurricane names for 2022: Is yours on the list?

The World Meteorological Organization chooses hurricane names several years in advance. Find hurricane names for 2022 here. Is your name on the list?
Today's Image

Lunar eclipse photos, via EarthSky’s community

The May 15-16, 2022, total eclipse of the moon is over. Now, check out these beautiful lunar eclipse photos from EarthSky's community members!

Total lunar eclipse – a supermoon eclipse – on May 15-16, 2022

A 90-minute total lunar eclipse on Sunday, May 15-16, 2022. It's seen across much of Earth, best from the Americas and western Africa.

Retrograde motion can be real or illusory

Retrograde motion of Jupiter or Mars or Saturn in our sky is an illusion, a trick of perspective. But there's a real retrograde motion, too.

What’s a constellation? What’s an asterism?

Constellations and asterisms are patterns of stars. Some asterisms consist of stars from different constellations, and some are part of one constellation.

How Pluto got its name

Eleven-year-old Venetia Burney named Pluto for a god of the underworld. The name also honored Percival Lowell, the pioneering astronomer.