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Posts by
Editors of EarthSky
The April birthstone is the diamond, the hardest known gem
Happy birthday, April babies! The April birthstone, the diamond, is the hardest of the known gems. And it's a popular choice for engagement rings.
April 1, 2026
Biggest earthquake in North America 62 years ago today
On Good Friday, March 27, 1964, south-central Alaska heaved under the biggest earthquake recorded in North America, registering a 9.2 on the Richter scale.
March 27, 2026
A Spring Triangle of stars heralds the season
As the Northern Hemisphere enters spring, look for the Spring Triangle rising in the east, made up of bright stars from 3 prominent constellations.
March 22, 2026
What makes a halo around the sun or moon?
A halo around the sun or moon often appears as a glowing ring in the sky. It’s a stunning sight, but have you ever wondered what causes it?
March 18, 2026
What’s a galaxy? All you need to know about galaxies
What is a galaxy? We live in a galaxy called the Milky Way. But there is so much more to know about these grand and glorious star islands in space!
March 18, 2026
What are the Ides of March, and why should you beware?
What are the Ides of March? That's March 15. In Shakespeare's play, Julius Caesar was warned to "Beware the Ides of March" before his assassination.
March 15, 2026
What will Artemis 2 astronauts eat on their moon trip?
Get a peek at the items that will be on the menu for Artemis 2 astronauts as they make their journey to the moon in 2026.
March 12, 2026
Use the Big Dipper to find Polaris, the North Star
Do you know how to find the North Star? The 2 outer stars in the bowl of the Big Dipper point to Polaris, the North Star. It's quick and easy!
March 8, 2026
Zodiacal light on spring evenings
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.
March 6, 2026
Asteroid 2024 YR4 won’t hit the moon after all
NASA said on March 5, 2026, that asteroid 2024 YR4 will not strike the moon in 2032. New observations have now ruled out previous probabilities.
March 5, 2026
