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发帖数: 1994 | 1 Dusty Environs of Eta Carinae
Credit: MSX, IPAC, NASA
Explanation: Eta Car is a massive star, but it's not as bright as it used to be. Now only easily
visible in binoculars or a small telescope, Eta Carinae has a history of spectacular flaring
and fading behavior. In fact, in April of 1843 Eta Car briefly became second only to Sirius
as the brightest star in planet Earth's night sky, even though at a distance of about 7,500
light-years, it is about 800 times farther away. Su |
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