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Space
Rare massive white dwarf was born when 2 stars collided
A rare massive white dwarf star 128 light-years away formed from the collision and merger of 2 stars, NASA's Hubble Space Telescope has found.
August 17, 2025
Earth
Sun
Sun news: Calm now, but storm chance ahead
Sun news August 17, 2025. Solar flare activity remains low. But high-speed solar wind brings the possibility of geomagnetic storms and aurora to high latitudes.
Astronomy Essentials
Tonight
Visible planets and night sky guide for August
Visible planets and night sky guide. Tomorrow the moon lies between Capella and Betelgeuse. And see a video about Mercury's upcoming greatest elongation here.
August 17, 2025
Earth
Hurricane Erin now Cat 5 after extremely rapid intensification
Hurricane Erin became the first hurricane of the season Friday. It then experienced rapid intensification overnight, and it's now a Category 5 storm.
August 16, 2025
Space
New type of supernova, as a black hole triggers a star explosion
Astronomers believe they've found a new type of supernova. They say it exploded as a star tried to envelop its black hole companion.
August 15, 2025
Earth
Do you love twilight? The 3 stages explained
Twilight is that magical time between sunlight and darkness. Astronomers, the experts on nighttime, recognize three stages of twilight.
August 15, 2025
Constellations
Delphinus the Dolphin has a graceful kite shape
Delphinus the Dolphin is a petite constellation that looks like the animal it's supposed to represent. Look for the dolphin leaping under the Summer Triangle.
August 15, 2025
Space
Giant free-floating planets might have planets of their own
Giant free-floating planets drift in space with no stars. New observations from the Webb telescope suggest they could have their own planets orbiting them.
August 14, 2025
Earth
Can you see a full circle rainbow? All you need to know
It's possible to see the full circle rainbow, but sky conditions have to be just right. They're most often seen by pilots, who have a good view of the sky.
August 14, 2025
Space
Strange spiral in the night sky was a rocket fuel dump
On Tuesday, August 12, 2025, many people in the U.S. and Canada reported seeing a strange spiral in the night sky. It was a fuel dump from a rocket.
August 13, 2025
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