https://www.smithsonianmag.com/rss/tag/astrophysics/RSS feed for AstrophysicsenTue, 22 Sep 2026 19:12:34 +0000https://www.smithsonianmag.com/smart-news/mercury-has-wrinkles-that-show-its-shrinking-now-scientists-say-the-planet-has-shriveled-far-more-than-we-previously-thought-180989532/A new study suggests that our solar system’s smallest planet has shrunk by up to 30 percent since its birth roughly 4.5 billion years agoTue, 22 Sep 2026 19:12:34 +0000https://www.smithsonianmag.com/smart-news/mercury-has-wrinkles-that-show-its-shrinking-now-scientists-say-the-planet-has-shriveled-far-more-than-we-previously-thought-180989532/https://www.smithsonianmag.com/smithsonian-institution/active-supermassive-black-holes-may-be-engines-of-star-formation-not-just-destruction-study-suggests-180989517/Scientists mapped out the structure of nine bright cores of galaxies located near the Milky Way and revealed common patterns that could shed light on how the universe evolvedMon, 21 Sep 2026 17:26:26 +0000https://www.smithsonianmag.com/smithsonian-institution/active-supermassive-black-holes-may-be-engines-of-star-formation-not-just-destruction-study-suggests-180989517/https://www.smithsonianmag.com/smart-news/billions-of-years-ago-venus-may-have-had-a-moon-which-the-planet-promptly-gobbled-up-study-suggests-180989510/Scientists have puzzled over why the planet dubbed "Earth's twin" doesn't have a moon. Computer simulations hint that if Venus ever did have one, it probably would've cannibalized its companionThu, 17 Sep 2026 15:00:00 +0000https://www.smithsonianmag.com/smart-news/billions-of-years-ago-venus-may-have-had-a-moon-which-the-planet-promptly-gobbled-up-study-suggests-180989510/https://www.smithsonianmag.com/smart-news/scientists-may-have-finally-detected-a-hint-of-dark-matter-the-mysterious-invisible-stuff-that-holds-the-universe-together-180989440/A South Dakota-based instrument built to detect theoretical dark matter particles has sensed a particle interaction that's difficult to explain with known phenomena. But more data is needed to confirm that the strange substance—which scientists have never directly observed—is, indeed, the culpritTue, 08 Sep 2026 15:23:14 +0000https://www.smithsonianmag.com/smart-news/scientists-may-have-finally-detected-a-hint-of-dark-matter-the-mysterious-invisible-stuff-that-holds-the-universe-together-180989440/https://www.smithsonianmag.com/smart-news/a-mysterious-decagon-unexpectedly-appeared-around-saturns-south-pole-the-ten-sided-shape-seems-to-be-a-wave-in-the-atmosphere-180989449/Decades ago, scientists found a hexagon around Saturn’s north pole. Now, recent images reveal a decagon in the planet’s southern hemisphere—and it seems to have recently formedThu, 03 Sep 2026 19:01:23 +0000https://www.smithsonianmag.com/smart-news/a-mysterious-decagon-unexpectedly-appeared-around-saturns-south-pole-the-ten-sided-shape-seems-to-be-a-wave-in-the-atmosphere-180989449/https://www.smithsonianmag.com/smart-news/nasas-nancy-grace-roman-space-telescope-launches-to-find-exoplanets-and-unravel-mysteries-of-dark-matter-and-dark-energy-180989268/The new observatory will complete three surveys of the universe in five years, although it's designed to function at least twice as long. Its data could change scientists' basic understanding of the cosmosSun, 30 Aug 2026 11:26:00 +0000https://www.smithsonianmag.com/smart-news/nasas-nancy-grace-roman-space-telescope-launches-to-find-exoplanets-and-unravel-mysteries-of-dark-matter-and-dark-energy-180989268/https://www.smithsonianmag.com/smart-news/this-star-orbits-our-galaxys-heart-at-a-record-breaking-speed-and-could-help-uncover-secrets-about-the-behemoth-black-hole-there-180989393/The speedster travels at up to 56 million miles per hour, or about 8 percent the speed of light. It also gets very close to the supermassive black hole at the center of the Milky WayFri, 28 Aug 2026 15:45:08 +0000https://www.smithsonianmag.com/smart-news/this-star-orbits-our-galaxys-heart-at-a-record-breaking-speed-and-could-help-uncover-secrets-about-the-behemoth-black-hole-there-180989393/https://www.smithsonianmag.com/smart-news/a-new-telescope-still-under-construction-accidentally-reveals-how-a-dying-star-returns-matter-to-space-180989349/Researchers captured an unprecedented image of the stellar recycling process while calibrating a Chile-based instrument called MOTHRA, which is expected to be complete by the end of 2026Wed, 26 Aug 2026 14:00:00 +0000https://www.smithsonianmag.com/smart-news/a-new-telescope-still-under-construction-accidentally-reveals-how-a-dying-star-returns-matter-to-space-180989349/https://www.smithsonianmag.com/smart-news/nasa-funded-mission-to-rescue-a-falling-space-telescope-officially-ends-in-failure-180989376/The commercial LINK spacecraft was supposed to give NASA's Swift observatory a boost, pushing it higher into orbit to extend its life. But after launch, LINK experienced several problems. Swift is expected to re-enter Earth's atmosphere and burn up by the end of this yearThu, 20 Aug 2026 19:35:40 +0000https://www.smithsonianmag.com/smart-news/nasa-funded-mission-to-rescue-a-falling-space-telescope-officially-ends-in-failure-180989376/https://www.smithsonianmag.com/science-nature/earths-organisms-developed-via-evolution-some-theorists-wonder-what-if-the-entire-cosmos-did-too-180989338/The idea that universes evolve like organisms sat on the fringes of theoretical physics for decades. Then, a Substack post and a 2022 find by the James Webb Space Telescope boosted the conceptTue, 18 Aug 2026 16:00:01 +0000https://www.smithsonianmag.com/science-nature/earths-organisms-developed-via-evolution-some-theorists-wonder-what-if-the-entire-cosmos-did-too-180989338/https://www.smithsonianmag.com/smart-news/astronomers-peered-at-the-early-universe-and-may-have-discovered-a-new-kind-of-celestial-object-black-hole-stars-180989334/Since the James Webb Space Telescope started collecting data in 2022, it has found puzzling objects dubbed little red dots. A new study suggests they might be giant black holes with some characteristics of starsFri, 14 Aug 2026 15:47:00 +0000https://www.smithsonianmag.com/smart-news/astronomers-peered-at-the-early-universe-and-may-have-discovered-a-new-kind-of-celestial-object-black-hole-stars-180989334/https://www.smithsonianmag.com/smart-news/stunning-new-images-reveal-whirlpools-on-the-suns-surface-the-swirling-strutures-might-help-power-solar-flares-180989292/Observed directly in the solar photosphere for the first time, the vortices might braid magnetic fields, thought to be responsible for energy buildups and eventual outbursts. The features also offer clues about why the sun’s outer atmosphere is millions of degrees hotter than its surfaceWed, 12 Aug 2026 18:19:56 +0000https://www.smithsonianmag.com/smart-news/stunning-new-images-reveal-whirlpools-on-the-suns-surface-the-swirling-strutures-might-help-power-solar-flares-180989292/https://www.smithsonianmag.com/smart-news/in-a-first-astronomers-may-have-spotted-a-supermassive-black-hole-that-wandered-to-the-edge-of-its-galaxy-180989233/These giant celestial objects have mostly been identified at the centers of galaxies, where they're known to reside. But a recently discovered one—found because of the light emitted while it snacked on a star—appears to be more than 30,000 light-years from its host galaxy's heartTue, 04 Aug 2026 16:16:17 +0000https://www.smithsonianmag.com/smart-news/in-a-first-astronomers-may-have-spotted-a-supermassive-black-hole-that-wandered-to-the-edge-of-its-galaxy-180989233/https://www.smithsonianmag.com/smart-news/new-images-provide-the-best-evidence-yet-that-supergiant-star-betelgeuse-does-inded-have-a-long-theorized-stellar-companion-180989225/The research team is mostly convinced by the data, but they want to capture additional observations in 2027 to confirm what they've foundMon, 03 Aug 2026 20:07:35 +0000https://www.smithsonianmag.com/smart-news/new-images-provide-the-best-evidence-yet-that-supergiant-star-betelgeuse-does-inded-have-a-long-theorized-stellar-companion-180989225/