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4 giorni fa · Astronomers at Yale and the University of Hong Kong have proposed a new strategy for finding the universe’s first stars — by looking for signs of their final, fiery flares. For years, scientists have searched for direct evidence of “Population III” stars, the first generation of stars that lit up the universe just a few hundred million ...
5 giorni fa · It seems that the added kick is driven by these stars having stronger magnetic fields. For your amusement, the Sun-like star in epsilon Eridani is linked in Star Trek lore to the planet Vulcan. This means, if you want a more nuanced view, Vulcan would potentially have more aurora than Earth, and it would be getting blasted by more powerful solar winds hitting its atmosphere.
5 giorni fa · The results help explain why stars born from the same molecular cloud can possess different chemical composition and host different planetary systems, as well as pose challenges to current stellar and planet formation models. It is estimated that up to 85% of stars exist in binary star systems, some even in systems with three or more stars.
2 giorni fa · Mar. 6, 2024 — Open any astronomy textbook to the section on white dwarf stars and you'll likely learn that they are 'dead stars' that continuously cool down over time. Astronomers are ...
3 giorni fa · Over the years astronomers have done a lot of research into this possibility, and the good news—sort of— is that a supernova would have to be less than about 160 light-years from Earth to ...
5 giorni fa · At least one in a dozen stars shows evidence of planetary ingestion. By analysing the chemical abundance differences of pairs of co-moving stars born together, it is found that about 8% show ...
3 giorni fa · Adaptive Optics Guide Stars. Guide Star Finder: A Web tool aimed at searching for suitable adaptive optics guide stars, either for single objects as for a list of observing targets. The tool is based on the USNO-SA2.0 catalogue. Work is in progress to use USNO-B catalogue as an option. The tool also offers the possibility to choose the ...
