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Hace 5 días · 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 ...
Hace 4 días · 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 selection criteria from a short list ...
Hace 4 días · 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 ...
Hace 4 días · A star is a luminous spheroid of plasma held together by self-gravity. The nearest star to Earth is the Sun.Many other stars are visible to the naked eye at night; their immense distances from Earth make them appear as fixed points of light. The most prominent stars have been categorised into constellations and asterisms, and many of the brightest stars have proper names.
Hace 1 día · The once-in-20-years solar storm triggered auroras that stunned the world, but the light shows have since tapered off. The spectacular auroras that danced across the sky in many parts of the world ...
Hace 4 días · Gaia is a space observatory of the European Space Agency (ESA), launched in 2013 and expected to operate until 2025. The spacecraft is designed for astrometry: measuring the positions, distances and motions of stars with unprecedented precision, and the positions of exoplanets by measuring attributes about the stars they orbit such as their apparent magnitude and color.
Hace 2 días · Astronomy Picture of the Day. Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. Explanation: Northern lights don't usually reach this far south. Magnetic chaos in the Sun's huge Active Region 3664, however, produced a surface explosion that sent ...
