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Sun
Giant sunspot region now visible in eclipse glasses
Did you save your eclipse glasses from the April 8 total solar eclipse? If so, grab them to check out giant sunspot region AR3664, now facing Earth!
May 10, 2024
Earth
Orangutan treats his wound with a medicinal plant
In a first, a Sumatran orangutan treated his wound with a plant with known medicinal properties. Read more about this new doctor in the forest.
May 10, 2024
Space
Plunge into a black hole in this new video
Plunge into a black hole in this new video from NASA. See what it would look like to cross the event horizon of a supermassive black hole.
May 10, 2024
Astronomy Essentials
Retrograde motion can be real or illusory
Retrograde motion of planets like Jupiter or Mars in our sky is an illusion, a trick of perspective. But there's a real retrograde motion, too.
May 10, 2024
Astronomy Essentials
Tonight
Visible planets and night sky guide for May
Visible planets and night sky guide for May 2024. See the waxing crescent moon between two bright stars tonight.
May 10, 2024
Tonight
Vega is a bright bluish star on May evenings
The blue star Vega is the brightest light in the distinctive constellation Lyra the Harp. Vega is easy to spot in May by looking northeast in the evening.
May 10, 2024
Space
How did water on Venus disappear? Blame this molecule
Venus is a near-twin to Earth in size and mass. But what happened to all the water on Venus, which scientists say once existed?
May 9, 2024
Brightest Stars
Tonight
Tonight’s young moon emerges into the evening sky
The young moon will compete in brightness with several bright stars on the evening of May 9, 2024. Which will shine most brightly?
May 9, 2024
Brightest Stars
Polaris is the present-day North Star
Many people think Polaris is the brightest star, but it's only 48th in brightness. Still, Polaris is famous because the entire northern sky wheels around it.
May 9, 2024
Brightest Stars
Arcturus, the brightest star of the northern sky
Arcturus is the brightest star north of the celestial equator. Near the handle of the Big Dipper, it's easy to find in spring in the Northern Hemisphere.
May 9, 2024
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