保护地球，探索宇宙，发现文明
2023年7月9日 Doomed Star Eta Carinae Image Credit & Copyright: NASA, ESA, Hubble; Processing & License: Judy Schmidt Explanation: Eta Carinae may be about to explode. But no one knows when – it may be next year, it may be one million years from now. Eta Carinae‘s mass – about 100 times greater than our Sun – makes it an excelle...
2022年2月9日 Eta Car: 3D Model of the Most Dangerous Star Known Video Credit: NASA, CXC, April Hobart; Text: Michael F. Corcoran (NASA, Catholic U., HEAPOW) Explanation: What’s the most dangerous star near earth? Many believe it’s Eta Carinae, a binary star system about 100 times the mass of the Sun, just 10,000 light years from earth. Eta Carinae i...
2020 May 5 Carina in Perspective Image Credit & Copyright: Carlos Kiko Fairbairn Explanation: You need to be in the south, looking south, to see such a sky. And only then if you’re lucky. Just above the picturesque tree is the impressive Carina Nebula, one of the few nebulas in the sky that is visible to the unaided eye. The featured image had to b...
2020 February 15 Carina Nebula Close Up Image Credit: NASA, ESA, Hubble, ESO, Amateur Data; Processing & Copyright: Robert Gendler & Roberto Colombari Explanation: A jewel of the southern sky, the Great Carina Nebula, also known as NGC 3372, spans over 300 light-years, one of our galaxy’s largest star forming regions. Like the smaller, more nor...
想象一下，有一场“慢动作烟花”从170年前就开始在空中绽开，直到如今仍然在继续向外扩张，当然，这种类型的烟花并不会射进地球大气层，而是由一颗质量极大的恒星爆发射入太空中的。 这颗超大质量恒星（super-massive star）名为“海山二”（Eta Carinae，又名船底座η），是迄今为止已知的双星系统（double-star system）中最大的恒星，距离我们7500光年之远。美国航空航天局（NASA）哈勃空间望远镜（Hubble Space Telescope）拍下了一张新图片（其中包括了人眼不可见的紫外线），图片中这颗巨大恒星发出了红、白、蓝三种颜色的高温气体，视觉上壮丽又旖旎，仿若花朵般绽放的烟火。 哈勃空间望远镜拍摄下了这颗硕大无朋、惊艳四座的恒星海山二，它绽开“花火”的图像正给我们带来一系列...