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Sun
Sun news: Activity dips, but sunspot regions look potent
Sun news for April 28, 2026: Activity dips to C-class (common) flares only, but AR4420 and AR4425 stay promising with high-potential magnetic setups.
April 28, 2026
Astronomy Essentials
Tonight
Visible planets and night sky guide for April and May
Visible planets and night sky guide. This evening, look for the moon near Spica, the brightest star in Virgo. The moon is waxing toward full this week.
Earth
Human World
Save the Frogs Day is today, Tuesday, April 28
Save the Frogs Day - a global amphibian conservation effort - is today, Tuesday, April 28, 2026. Amphibian health is an important marker of ecosystem quality.
April 28, 2026
Earth
The biggest US supervolcanoes you’ve never heard of
Two of the biggest US supervolcanoes erupted millions of years ago, and you’ve probably never heard of them: Wah Wah Springs and La Garita.
April 28, 2026
Space
Jan Oort birthday and discovery of the Oort Cloud
Dutch astronomer Jan Oort was born on April 28, 1900. He visualized a vast reservoir of icy comets on the fringes of our solar system, which now bears his name.
April 28, 2026
Earth
Severe weather outbreak today for Midwest
See the areas under threat of severe weather Monday here. Stay up to date with your local forecast and have multiple ways to receive vital weather warnings.
April 27, 2026
Earth
Disabled parrot becomes the alpha male
Bruce the disabled parrot has risen to alpha status among his peers. Bruce does not have an upper beak, yet he excels with a unique beak-jousting tactic.
April 27, 2026
Space
Interstellar comet 3I/ATLAS born in a cold environment
The chemistry of water in interstellar comet 3I/ATLAS indicates that its home star formed in colder conditions compared to that of our sun.
April 26, 2026
Space
New organics on Mars raise questions about life
NASA's Curiosity rover has identified the most diverse collection of organics on Mars ever found. They include some organics never seen before.
April 26, 2026
Sun
Slow solar wind is oddly fast, says Proba-3
Early data from the Proba-3 spacecraft has revealed that slow solar wind travels much faster than expected in the sun's inner corona.
April 26, 2026
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