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What made these weird straight lines on Dione?
Planetary scientists have discovered some very unusual long straight lines on the surface of Saturn's moon Dione. What created them?
November 1, 2018
Patagonia moon
Thank you to Grafixartphoto for this image of the moon reflected in a glassy lake in Torres del Paine, a national park encompassing mountains, glaciers, lakes, and rivers in southern Chilean Patagonia on October 23, 2018.
November 1, 2018
Kepler planet-hunter retires
We currently have nearly 4,000 confirmed exoplanets, or planets orbiting distant suns. Kepler discovered more than 2,600 of them. But now Kepler is passing the torch.
October 31, 2018
Why do we love to scream?
We love watching horror movies and getting scared in haunted houses. But why? This scientist has spent the past 10 years investigating just this question.
October 31, 2018
Tricks that animals play
Trick or treat! Here are 3 animals that excel at playing tricks on others - and not just on Halloween!
October 31, 2018
Year’s farthest perigee on October 31
Perigee means the moon is closest to Earth for the month. Apogee means it's farthest from Earth for the month. If you're game, we'll share a secret with you about why a quarter moon at perigee is farther away usual.
October 31, 2018
Parker solar probe becomes closest-yet spacecraft to sun
On Monday, the Parker Solar Probe, launched August 12, broke the record for closest approach to the sun by a human-made object.
October 30, 2018
Sun halo over Zimbabwe
Scientists call them 22-degree halos, because their radius is approximately 22 degrees from the sun. This one was seen over Africa, whose mythology about sun halos matches North American skylore.
October 30, 2018
How 600,000 pounds of dead salmon nourished Alaskan trees
For 20 years, researchers counting dead salmon tossed them on the side of a shallow creek. The result, it turns out, was healthier, faster-growing trees. You'll enjoy this video.
October 30, 2018
Ancient cold front in Perseus
Galactic cold fronts aren't like the cold fronts we experience on Earth. They're caused by galaxy clusters colliding into one another.
October 30, 2018
