Breathtaking space pictures from NASAThe Cygnus Loop, also called the Veil Nebula, is what’s left of a star that exploded.

Nebulas are dazzling clouds of gas and dust, where stars are born and die. Their glowing beauty has amazed skywatchers for centuries. Here are 25 stunning nebulas and the fascinating stories ...

它所含的氖、氩、氧和碳元素比太阳系多出三倍，氮元素含量更是太阳的五倍之多，堪称宇宙中的元素富矿。 沙漏星云 (Hourglass Nebula) 沙漏星云是另一颗垂死恒星的遗迹。 在其缓慢的死亡过程中，这颗恒星开始向两个方向抛射其外层气体，形成了对称的沙漏形状。

This stunning Hubble image of IC 758 shows a peaceful spiral galaxy with soft blue arms and a glowing core—but beneath its calm appearance lies the remnant of SN 1999bg, a massive star’s explosive ...

A galaxy ablaze with young stars is the subject of this NASA/ESA Hubble Space Telescope image. Named NGC 685, this galaxy is situated about 64 million light-years away in the constellation Eridanus ...

Hubble’s vivid view of NGC 685—a barred spiral galaxy 64 million light-years away—captures a spectacular star-forming frenzy. Swirls of hot blue star clusters and glowing pink gas clouds trace the ...