NGC 6814：哈勃望远镜的宏伟螺旋星系

2020年8月16日

NGC 6814: Grand Design Spiral Galaxy from Hubble
Image Credit: ESA/Hubble & NASA; Acknowledgement: Judy Schmidt

Explanation: In the center of this serene stellar swirl is likely a harrowing black-hole beast. The surrounding swirl sweeps around billions of stars which are highlighted by the brightest and bluest. The breadth and beauty of the display give the swirl the designation of a grand design spiral galaxy. The central beast shows evidence that it is a supermassive black hole about 10 million times the mass of our Sun. This ferocious creature devours stars and gas and is surrounded by a spinning moat of hot plasma that emits blasts of X-rays. The central violent activity gives it the designation of a Seyfert galaxy. Together, this beauty and beast are cataloged as NGC 6814 and have been appearing together toward the constellation of the Eagle (Aquila) for roughly the past billion years.

Pereid Meteor Shower: Notable images submitted to APOD

Tomorrow’s picture: open space

NGC 6814：哈勃望远镜的宏伟螺旋星系
影像提供: ESA/Hubble & NASA; 志谢: Judy Schmidt

说明: 在这个看似宁静的恒星漩涡之中心，可能藏着一颗怪兽般的黑洞。其周围由数十亿颗恒星构成的漩涡中，最醒目的是其中最亮与最蓝的恒星。这片视野的广度和美丽风貌，让这个天体赢得宏伟螺旋星系的令名。从星系核心“怪兽”所展现的迹象，显示它是一颗质量约太阳1千万倍的超大质量黑洞。这头凶猛的生物会吞噬恒星与气体，周围更环拱着一圈护城河般、一波波会辐射X射线的炽热电浆(等离子体)。而星系中心的剧烈活动，也为它博得西佛星系的分类。这对美女与野兽的编录号为NGC 6814，在过去10亿年之中结伴出现在天鹰座方向。

英仙座流星雨：向APOD提交的著名图片

明日的图片：open space