NASA的哈勃望远镜和斯皮策望远镜发现，两颗系外行星主要成分可能是水
由蒙特利尔大学的研究人员领导的一个团队发现了证据，表明围绕一颗红矮星运行的两颗系外行星是“水世界”，水在整个行星中占了很大一部分。这些行星位于天琴座218光年外的一个行星系中，不同于我们太阳系中发现的任何行星。
标签： 哈勃太空望远镜
哈勃望远镜观测到一个布满恒星的宇宙云
A portion of the open cluster NGC 6530 appears as a roiling wall of smoke studded with stars in this image from the NASA/ESA Hubble Space Telescope. NGC 6530 is a collection of several thousand stars lying around 4,350 light-years from Earth in the constellation Sagittarius. The cluster is set within the larger Lagoon Nebula, a gigantic interstellar cloud of...
哈勃望远镜拍摄到壮观的棒状螺旋
Against an inky black backdrop, the blue swirls of spiral galaxy NGC 6956 stand out radiantly. NGC 6956 is a barred spiral galaxy, a common type of spiral galaxy with a bar-shaped structure of stars in its center. This galaxy exists 214 million light-years away in the constellation Delphinus. Scientists used NASA’s Hubble Space Telescope to image NGC 6956 to...
哈勃望远镜发现发射星云双星团
Against a backdrop littered with tiny pinpricks of light glint a few, brighter stars. This whole collection is NGC 1858, an open star cluster in the northwest region of the Large Magellanic Cloud, a satellite galaxy of our Milky Way that boasts an abundance of star-forming regions. NGC 1858 is estimated to be around 10 million years old. Open clusters are a ...
哈勃望远镜观测到一个正在膨胀的宇宙云
A small, dense cloud of gas and dust called CB 130-3 blots out the center of this image from the NASA/ESA Hubble Space Telescope. CB 130-3 is an object known as a dense core, a compact agglomeration of gas and dust. This particular dense core is in the constellation Serpens and seems to billow across a field of background stars. Dense cores like CB 130-3 are...
哈勃太空望远镜发现神秘的宇宙“钥匙孔”
This peculiar portrait from the NASA/ESA Hubble Space Telescope showcases NGC 1999, a reflection nebula in the constellation Orion. NGC 1999 is around 1,350 light-years from Earth and lies near the Orion Nebula, the closest region of massive star formation to Earth. NGC 1999 itself is a relic of recent star formation – it is composed of debris left over from...
哈勃拍摄到一对相互作用的星系
The two interacting galaxies making up the pair known as Arp-Madore 608-333 seem to float side by side in this image from the NASA/ESA Hubble Space Telescope. Though they appear serene and unperturbed, the two are subtly warping one another through a mutual gravitational interaction that is disrupting and distorting both galaxies. Hubble’s Advanced Camera fo...
哈勃太空望远镜探测到保护一对矮星系的防护罩
数十亿年来，银河系最大的卫星星系——大麦哲伦星云和小麦哲伦星云——经历了一段危险的旅程。当它们被拉向我们的银河系时，它们相互环绕，开始解体，留下气态碎片的痕迹。然而，令天文学家困惑的是，这些矮星系仍然完好无损，恒星形成仍在继续。 “很多人都在努力解释，这些物质流为什么会在那里。”科罗拉多学院助理教授达内什·克里希纳劳说。“如果这些星系中的气体被移除，它们怎么还在形成恒星？” 借助于NASA哈勃太空望远镜和一颗名为远紫外光谱探测器（FUSE）的退役卫星的数据，由克里希纳劳领导的一组天文学家终于找到了答案：麦哲伦星系被星系冕（一种热增压气体的保护屏障）所包围。星系冕将这两个星系被包裹起来，防止它们的气体供应被银河系吸走，从而使它们能够继续形成新的恒星。 研究人员利用类星体紫外线的光谱观测来探测和绘制麦哲伦星系冕，这...
暴风雨般的恒星托儿所
This cloudy, turbulent scene acquired by the Hubble Space Telescope in 2017 shows a stellar nursery within the Large Magellanic Cloud. This nursery, known as N159, contains many hot young stars. These stars emit intense ultraviolet light, which causes nearby hydrogen gas to glow, and torrential stellar winds, which carve out ridges, arcs, and filaments from ...
为恒星爆炸设置时钟
影像来源：X射线：NASA/CXC/GSFC/B. J. Williams et al.；可见光：NASA/ESA/STScI 虽然天文学家已经看到了银河系和附近星系中数十颗爆炸恒星的碎片，但通常很难确定恒星消亡的时间线。通过使用NASA望远镜研究邻近星系中壮观的超新星遗迹，一组天文学家已经找到了足够的线索来帮助时光倒流。 超新星遗迹SNR 0519-69.0（简称SNR 059）是白矮星爆炸产生的碎片。在达到临界质量后，无论是从伴星中吸取物质还是与另一颗白矮星合并，恒星都经历了热核爆炸并被摧毁。科学家们将这种被称为Ia型的超新星用于广泛的科学研究，从热核爆炸研究到测量数十亿光年的星系距离。 SNR 0519位于大麦哲伦星云中，这是一个距离地球160,000光年的小星系。这张合成图像显示了来自NASA钱德拉X射...