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Editors of EarthSky
Follow the arc to Arcturus, then speed on to Spica
If you only ever learn 1 star mnemonic, make it this one! Arc to Arcturus and speed on to Spica to identify 2 of the sky's brightest stars.
April 9, 2026
Watch sungrazing Comet MAPS break up near the sun
Sungrazing comet C/2026 A1 (MAPS) apparently didn't survive its close encounter with the sun. Watch the apparent breakup in spacecraft images!
April 6, 2026
Star-hop from Orion to Sirius: See them before they go!
Star-hopping is going from stars you know to stars you don't know. Star-hop from the constellation Orion to Sirius, sky's brightest star, before they're gone.
April 3, 2026
Easter is April 5 and Orthodox Easter is April 12
In 2026, Easter falls on April 5. It falls on the first Sunday after the first full moon after the March equinox. More about the date of Easter, here.
April 3, 2026
Watch for the daytime moon after sunrise this week
Watch for the beautiful daytime moon this week, a pale orb floating against a blue sky in the morning hours. Look west! You'll see it!
April 2, 2026
Comet Hale-Bopp closest to the sun 29 years ago today
Comet Hale-Bopp was at its closest point to the sun 29 years ago today. It was widely seen from the Northern Hemisphere. When will we see it again?
April 1, 2026
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
Look for Mercury farthest from the morning sun on April 3
Mercury will reach its greatest elongation - greatest distance from the sun - on April 3, 2026. Look east at dawn. It'll disappear by late April.
March 29, 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
