哈勃拍摄到银河魅力的照片

This stunning image by the NASA/ESA Hubble Space Telescope features the spiral galaxy NGC 5643 in the constellation of Lupus (the Wolf). Looking this good isn’t easy; 30 different exposures, for a total of nine hours of observation time, together with the high resolution and clarity of Hubble, were needed to produce an image of such high level of detail and beauty.

NGC 5643 is about 60 million light-years away from Earth and has been the host of a recent supernova event (not visible in this latest image). This supernova (2017cbv) was a specific type in which a white dwarf steals so much mass from a companion star that it becomes unstable and explodes. The explosion releases significant amounts of energy and lights up that part of the galaxy.

The observation was proposed by Adam Riess, who (alongside Saul Perlmutter and Brian Schmidt) was awarded a Nobel Prize in physics in 2011 for his contributions to the discovery of the accelerating expansion of the universe.

Text credit: ESA (European Space Agency)
Image credit: ESA/Hubble & NASA, A. Riess et al.; acknowledgment: Mahdi Zamani

NASA/ESA哈勃太空望远镜拍摄的这张令人惊叹的影像，其特征是狼疮（狼）星座中的旋涡星系NGC 5643。看起来不错，但这并不容易；为了产生如此高的细节和美感，需要30次不同的曝光（总共需要9个小时的观察时间）以及高分辨率和高清晰度的哈勃望远镜。

NGC 5643距离地球约6000万光年，是最近一次超新星爆发的宿主(在这张最新的图片中看不到)。这颗超新星(2017cbv)是一种特殊类型的超新星，其中白矮星从同伴恒星中窃取了如此多的质量，导致它变得不稳定并爆炸。爆炸释放出大量的能量，并照亮了该部分星系。

这一发现是由亚当·里斯(Adam Riess)提出的，他(与索尔·珀尔马特(Saul Perlmutter)和布莱恩·施密特(Brian Schmidt)一起)因发现宇宙加速膨胀做出的贡献而在2011年获得了诺贝尔物理学奖。

文本来源：欧洲航天局（ESA）
图片来源：ESA/Hubble & NASA, A. Riess等人;答谢:Mahdi Zamani