A Hungry Black Hole, Betelgeuse's Hidden Companion, and Rings Across Venus
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Astronomers detected the first confirmed wandering black hole consuming a star — a tidal disruption event produced by an object moving through intergalactic space rather than anchored at a galactic center. The black hole was most likely ejected from its home galaxy through a gravitational interaction, probably a merger between two galaxies with competing supermassive black holes at their cores. The star's material, falling into the black hole, produced the X-ray and ultraviolet flare that made the object visible. Without that flare, the wandering black hole would have been entirely invisible to observation.
A century-old mystery about Betelgeuse was resolved when astronomers using the Very Large Telescope in Chile captured the first image of the red supergiant's companion star, long theorized but never directly observed because Betelgeuse's own luminosity overwhelmed it. Using a technique that blocked the primary star's light, researchers located the companion at roughly 2.4 astronomical units of orbital distance. The discovery provides a new framework for interpreting Betelgeuse's unusual dimming events in recent years — some of which may have been orbital occultation by the companion rather than the previously identified dust cloud. Betelgeuse is expected to go supernova within the next hundred thousand years, and the companion's existence changes models of what that explosion will look like and how it will interact with the surrounding stellar environment.
Researchers separately found vast concentric ring structures in Venus's atmosphere — enormous wave patterns spanning thousands of kilometers, thought to be generated by gravity waves propagating upward from the planet's surface through its dense cloud layers. Venus's atmosphere rotates approximately 60 times faster than its surface, generating the fluid dynamics that can produce planetary-scale wave patterns. The rings are carrying information about the planet's interior structure upward through the atmosphere in ways now measurable from orbit — data that will almost certainly reshape the atmospheric sampling plans for NASA's planned DAVINCI entry probe.
A PFAS destruction startup raised $55 million to scale its technology globally after apparently developing a chemical pathway that breaks the carbon-fluorine bond in per- and polyfluoroalkyl substances — a degradation process previously considered nearly impossible at commercial scale. Per- and polyfluoroalkyl substances are present in drinking water systems across more than 3,000 U.S. communities and do not break down through conventional treatment. The U.S. market for PFAS remediation is estimated at over $200 billion.