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Astronomers Measure the Long Reach of a Quasar

31-07-2026 19:43 via universetoday.com

There are a number of things in the Universe that could wipe out life as we know it, but — for now, and for Earth — a blast from our galaxy's supermassive black hole isn't one of them. That's not to say that Sagittarius A* doesn't pose a danger. If it wakes up someday and blasts out a strong wind, that definitely could affect Earth. It could well have powered a quasar in the past, and could do so again.

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The Star That Exploded Without Hydrogen

31-07-2026 18:47 via universetoday.com

Twenty five years ago a star in the constellation Puppis blew itself apart and then vanished behind a curtain of its own soot. Astronomers knew only that the explosion contained no hydrogen at all, which for the most abundant element in the universe is a very strange absence. Now the dust has finally thinned, and the culprits have stepped into view, a white dwarf quietly stripping a rare helium star of its substance. But the emerging picture came with something nobody expected, clumps of gas tea

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Astrobiologist Uses Apollo Lunar Samples As Mirror Onto Early Earth

31-07-2026 18:03 via universetoday.com

A Tokyo-based astrobiologist is using an ingenious new way to garner insight into Earth’s 3.5-billion-year-old biosphere.

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NASA Wants to Toss 10,000 Tiny Probes Directly Into Saturn's Rings

31-07-2026 17:32 via universetoday.com

Cassini, NASA’s last major mission to Saturn, famously plunged to its fiery death in the gas giant’s atmosphere at the end of its mission. It had captured more accurate in-situ data of the Saturnian system than any mission before or since. But there’s one particular part that it couldn’t directly approach - Saturn’s rings. But NASA very obviously wants to take a nice up-close look at them, as they have recently funded a NASA Institute for Advanced Concepts (NIAC) Ph

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What happens to a moon when its planet is stolen?

31-07-2026 17:16 via universetoday.com

The galaxy is littered with rogue planets, worlds flung out of the systems that built them, drifting between the stars with no sun to call their own. But when a planet is torn away, does anything go with it? New simulations say yes, a passing star can rip a world out of its orbit and leave its moons still faithfully circling it, sailing off into the dark as a set. If our own Jupiter were evicted tomorrow, all four Galilean moons would go with it. And in that darkness, with no sunlight at all, on

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Botsingen tussen neutronensterren kunnen goudvorming langzamer laten verlopen dan verwacht

31-07-2026 10:25 via astroblogs.nl

Waar komen goud, platina en uranium vandaan? Deze vraag fascineert astrofysici en kernfysici al decennia. Een onderzoeksteam van de Technische Universiteit Darmstadt heeft nu een belangrijke stap gezet in het begrijpen van de oorsprong van zware elementen. Hun bevindingen, gepubliceerd in Physical Review Letters, tonen voor het eerst aan hoe moderne ab initio-berekeningen van atoomkernen […]

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It Took a Century, but Astronomers Imaged Betelgeuse's Companion

31-07-2026 10:19 via universetoday.com

Most of us are familiar with Betelgeuse (also known as alpha Orionis), the bright shoulder star in the constellation Orion. It's a red supergiant star that lies somewhere between 400 and 550 light-years away from us and is quite bright. Betelgeuse contains about 14 times the mass of the Sun and is a fairly young star compared to ours. It appears to be no more than 10 million years old, which means that it evolved rapidly from a protostar to the red giant we see today. That lifecycle means Betelg

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Mercury's Weak Magnetic Field Periodically Traps Solar Wind

31-07-2026 05:32 via universetoday.com

The planet Mercury is the first planet from the Sun but also one shrouded in mystery. This is primarily due to the limited number of spacecrafts that have visited it, but this limited data has provided scientists with new and exciting characteristics previously thought impossible. One fascinating aspect is its magnetic field, which was first discovered in March 1974, which both surprised and puzzled scientists due to the planet’s small size, which is measured at about half the size of the

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What Killed Galaxies in the Early Universe?

31-07-2026 00:00 via universetoday.com

Galaxies in the infancy of the Universe are the building blocks of more modern galaxies. They began as small "shreds" of material that coalesced over time to form larger ones. That's why astronomers use observatories such as the James Webb Space Telescope (JWST) to study the young Universe. The light from those early objects appears in the infrared part of the spectrum, which JWST is tuned to see.

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