Giant star spots likely cause of Betelgeuse dimming

Betelgeuse, the bright star in the constellation of Orion, has been fascinating astronomers in the recent months because of its unusually strong decline in brightness. Scientists have been discussing a number of scenarios ...

Neptune-sized planet discovered orbiting young, nearby star

For more than a decade, astronomers have searched for planets orbiting AU Microscopii, a nearby star still surrounded by a disk of debris left over from its formation. Now scientists using data from NASA's Transiting Exoplanet ...

MAXI J1820+070: Black hole outburst caught on video

Astronomers have caught a black hole hurling hot material into space at close to the speed of light. This flare-up was captured in a new movie from NASA's Chandra X-ray Observatory.

Do urban fish exhibit impaired sleep?

Melatonin controls the body clock—high melatonin levels make us feel tired in the evening. However, the hormone also plays an important role in animals' biological rhythms. Artificial light at night—light pollution—can ...

Glitch delays launch of Europe's exoplanet hunter

A technical rocket glitch during the final countdown Tuesday pushed back by a day the blastoff of Europe's CHEOPS planet-hunting satellite, launch company Arianespace and Russia's Roscosmos agency said.

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