Tag: The Universe

Mars was hot then cold then hot again. Could life have really survived there?

NeRD

New research suggests that temperatures on ancient Mars may have fluctuated between hot and cold periods through a relatively short period during its lifetime of billions of years. But these hot and cold spells may have been detrimental to life if it existed on the Red Planet. Mars may be a dry and arid planet today, but scientists know that Earth’s neighbor was much wetter and much more like our planet in its ancient past. These new findings from a team of researchers at the Harvard John A. Paulson School…

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Astronomers find hundreds of ‘hidden’ black holes — and there may be billions or even trillions more

NeRD

Astronomers have discovered hundreds of hidden supermassive black holes lurking in the universe — and there may be billions or even trillions more out there that we still haven’t found. The researchers identified these giant black holes by peering through clouds of dust and gas in infrared light. The finds could help astronomers refine their theories of how galaxies evolve, the researchers say. Hunting for black holes is difficult work. They are the darkest objects in the universe, as not even light can escape their gravitational pull. Scientists can sometimes…

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NASA X-ray telescope Chandra discovers black holes ‘blow’ on their food to cool it down

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Anyone who has experienced the blistering pain associated with biting into a fresh apple pastry or taking a swig of hot coffee can attest to the importance of blowing on your food or drink before introducing it to your mouth. It turns out that black holes may perform the cosmic equivalent of this routine, “blowing” on blistering hot matter before they gobble it down. This supermassive black hole-food cooling process was discovered by astronomers using NASA’s Chandra X-ray telescope and the Very Large Telescope (VLT) to observe some of the…

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Satellites watch world’s largest iceberg on crash course with Antarctic penguin island (photo/video)

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The world’s largest iceberg, A23a, is drifting toward South Georgia Island, a remote and ecologically vital wildlife haven. This massive block of ice, about the size of Rhode Island, poses a significant threat to the delicate ecosystem of the island, home to penguins and seals. Satellite images, including recent data captured by NOAA’s GOES East satellite on Jan. 22, 2025, are closely monitoring the iceberg’s slow journey through the Southern Ocean, where it could soon reach the shallow waters surrounding South Georgia. Breaking free Iceberg A23a has been a concern…

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Supermassive black holes in ‘little red dot’ galaxies are 1,000 times larger than they should be, and astronomers don’t know why

NeRD

Using the James Webb Space Telescope (JWST), astronomers have discovered distant, overly massive supermassive black holes in the early universe. The black holes seem way too massive compared to the mass of the stars in the galaxies that host them. In the modern universe, for galaxies close to our own Milky Way, supermassive black holes tend to have masses equal to around 0.01% of the stellar mass of their host galaxy. Thus, for every 10,000 solar masses attributed to stars in a galaxy, there is around one solar mass of…

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Earth is bombarded with rocks from space — but who gets to keep these ultimate antiques?

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Every day, about 48.5 tons of space rock hurtle towards Earth. Meteorites that fall into the ocean are never recovered. But the ones that crash on land can spark debates about legal ownership. Globally, meteorite hunting has become a lucrative business, with chunks of alien rock traded online and shipped between countries. Meteorites hold the key to the mysteries of the universe, but increasingly, significant scientific finds are being lost to private collectors. Last year, New Zealand formally recorded an apple-sized meteorite weighing 810g. It fell on Department of Conservation…

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Mysterious Mars mounds may bolster case for ancient Red Planet ocean

NeRD

Thousands of hills and mounds on Mars have been found to contain layers of clay minerals, which formed when running water interacted with the rocks during a period when Mars’ northern reaches were flooded. “This research shows us that Mars’ climate was dramatically different in the distant past,” Joe McNeil of the Natural History Museum in London said in a statement. “The mounds are rich in clay minerals, meaning liquid water must have been present at the surface in large quantities nearly four billion years ago.” Mars is a planet…

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Invisible ‘flickering’ on the sun could predict potentially dangerous solar flares hours in advance

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Shining loops of plasma on the surface of the sun “flicker” hours before they unleash potentially dangerous solar flares, a new study shows. The new findings could help create more reliable space weather forecasts, researchers say. Solar flares are violent outbursts of electromagnetic radiation that shoot from the sun when invisible magnetic field lines at the sun’s surface get twisted up until they eventually snap. These outbursts most commonly occur around sunspots — dark patches where magnetic field lines poke through our home star’s surface — and often pull up…

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Scientists discover exoplanet with supersonic winds — the fastest in the known universe

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Astronomers have found winds on a distant world that blow at a phenomenal 5.6 miles per second (9 kilometers per second), or 20,500 miles per hour (33,000 kilometers per hour) — the fastest winds ever measured on a planet. The faraway world, a gas giant called WASP-127b that was discovered in 2016, orbits a star 520 light-years from Earth. It zips around its host star in just four days, following a slightly skewed orbit. The exoplanet is also likely tidally locked to its star the same way the moon is…

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Strange ‘quasi-moon’ of Earth gets named Cardea, after goddess of door hinges

NeRD

Until we live in a world based purely on sliding doors, door hinges will remain some of the most unsung heroes of our society. We’d still be able to saunter through door frames, sure, but nothing would so seamlessly connect the place we once were with the place we are going. On a metaphorical level, door hinges represent an intermediate state we use to move back and forth, and decide when to lock ourselves in the locations of here or there. It is thus only fitting for a goddess to…

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