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Moon Phases
April full moon – the Pink Moon – falls on April 23
The April 2024 full moon – on April 23 – is the Pink Moon and lies near the star Spica in the constellation Virgo. Find star charts here.
April 23, 2024
Favorite Star Patterns
Spring Triangle in the east at night, heralding the season
As the Northern Hemisphere enters spring, look for the Spring Triangle rising in the east, made up of bright beacons from three prominent constellations.
April 23, 2024
Brightest Stars
Sun
Sun news April 23: 9 M flares in the past day!
April 23, 2024, sun news. Sun activity shoots up to high after an impressive 9 M flares were blasted over the past 24 hours.
April 23, 2024
Astronomy Essentials
Tonight
Visible planets and night sky guide for April
Visible planets and star guide for April 2024. Tonight, watch for the full moon glowing brightly near the also-bright star Spica in Virgo the Maiden.
April 23, 2024
Earth
Antarctic meteorites are sinking in melting ice
Warming temperatures are causing Antarctic meteorites to sink through melting ice. These samples of our solar system are keys to understanding earthly life.
April 22, 2024
Astronomy Essentials
2024 Lyrid meteor shower: All you need to know
Best time to watch the Lyrid meteor shower: before dawn on the morning of April 22. Sure, there's a bright moon out there. But you might see some!
April 21, 2024
Astronomy Essentials
Meteors in moonlight: 6 tips for 2024’s Lyrids
Meteors in moonlight. It's not optimal, but it happens! Here's how to minimize the moon and optimize the Lyrid meteor shower in 2024.
April 21, 2024
Earth
Human World
Why do we celebrate Earth Day on April 22?
April 22 is the date of Earth Day in part because of Arbor Day, an earlier observance. The focus for 2024 is "Planet vs. Plastics."
April 21, 2024
Tonight
Comet Pons-Brooks closest to the sun on April 21
Comet Pons-Brooks makes its closest pass by the sun on April 21. Look for it after sunset in the west; it will soon slip into southern skies.
April 21, 2024
Earth
The cicadas are coming! The cicadas are coming!
The first cicadas are starting to emerge this spring, with trillions more on the way. Cicadas may be loud, but they're basically harmless.
April 21, 2024
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Space
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