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Watch a newly discovered, blue-whale-size asteroid fly super close to Earth todayNewly spotted asteroid 2026 JH2, which could be up to 115 feet wide, will fly past Earth closer than some satellites on Monday (May 18). The close approach will be visible to stargazers and can be viewed via livestream.
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Why are some constellations visible for only part of the year?Why do some constellations stay in the sky all year, while others disappear?
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Earth quiz: What do you know about our planet's most amazing features?Do you know Earth's highest peak, deepest point, and more? Test your knowledge about our planet in this quiz.
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What would happen to Earth if the sun suddenly vanished?Earth is habitable due to warmth from the sun. So what would happen if the sun disappeared?
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Can you see Earth's shadow?Earth's shadow follows the planet as it orbits the sun. You can get a sense of its enormous, awe-inspiring size by seeing this silhouette cast on objects ranging from satellites to the moon.
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Exceptionally rare sighting of planets colliding may shed light on the crash that formed the moonAstronomers say a distant, sunlike star shows signs of a catastrophic planet-on-planet crash that may mirror the ancient impact that formed Earth's moon.
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Vernal equinox 2026: When is the first day of spring?The first day of spring 2026 in the Northern Hemisphere arrives with the equinox on March 20. Here's when and why the seasons change.
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How long do most planets last?Planets are born, and they can also "die." So what's the lifespan of a typical planet?
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Viruses that evolved on the space station and were sent back to Earth were more effective at killing bacteriaNear-weightless conditions can mutate genes and alter the physical structures of bacteria and phages, disrupting their normal interactions in ways that could help us treat drug-resistant infections.
