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Posts by
Editors of EarthSky
Constellations and signs: What’s the difference?
What is the difference between the signs of the zodiac and the constellations of the zodiac? Astronomer Guy Ottewell illustrates and discusses this difference.
May 20, 2026
Apex of the sun: Look to Vega in May
Apex of the sun shows the direction our solar system moves through space, toward the bright star Vega in the May night sky.
May 15, 2026
The Southern Cross: your guide to due south
There's no bright star marking due south from the Southern Hemisphere. But the Southern Cross points the way.
May 14, 2026
Will the Blaze Star explode in 2026? How to see it
We're still waiting for the Blaze Star to go nova! Will it happen in 2026? Here's how to find Corona Borealis so you're ready when this star goes kablooey.
May 10, 2026
Von Kármán vortices are mesmerizing, swirling clouds
See von Kármán vortices - mesmerizing, swirling pattern of clouds - in these satellite images. These clouds form when the wind hits a barrier like a mountain.
May 8, 2026
Meteor shower guide 2026: Up next … the Arietids
Up next is the daytime Arietid meteor shower, you might catch some before dawn on the mornings around June 10. Try to block out the waxing crescent moon.
May 6, 2026
May birthstone: The magnificent green emerald
Happy birthday, May babies! The May birthstone is the emerald, a stone once worn by royalty in ancient Babylon and Egypt.
May 1, 2026
See great pics of Comet R3 PanSTARRS from our community
Comet R3 PanSTARRS is closest to Earth on April 26. See a cool image from a sun-watching spacecraft, and these fantastic community photos.
April 25, 2026
Seattle waterspout! What are waterspouts and how do they form?
See the Seattle waterspout that formed in Puget Sound on Wednesday. Then read more about waterspouts, which are essentially tornadoes over water.
April 16, 2026
Asteroid Apophis to sweep close 3 years from tomorrow
Three years from now, on April 13, 2029, the asteroid Apophis will zoom safely past the Earth. This much-anticipated event is a "must-see" for all.
April 12, 2026
