Resting on the tail of the Great Bear in the constellation of Ursa Major lies NGC 5585, a spiral galaxy that is more than it appears. The many stars and clouds of dust and gas that make up NGC 5585, shown here in this Hubble image, contribute only a small fraction of the total mass of the galaxy. As […]
Many colorful stars are packed close together in this image of the globular cluster NGC 1805, taken by the NASA/ESA Hubble Space Telescope. This tight grouping of thousands of stars is located near the edge of the Large Magellanic Cloud, a satellite galaxy of our own Milky Way. The stars orbit close
2020年9月13日 M2-9: Wings of a Butterfly Nebula Image Credit: Hubble Legacy Archive, NASA, ESA – Processing: Judy Schmidt Explanation: Are stars better appreciated for their art after they die? Actually, stars usually create their most artistic displays as they die. In the case of low-mass stars
美国航空航天局（NASA）哈勃空间望远镜的观测结果表明，红超巨星（red supergiant）参宿四（Betelgeuse，又称猎户座α星，α Orionis）的意外变暗很可能是由于大量热物质喷射到太空中，形成的尘埃云阻挡了参宿四表面的星光而造成的。 哈勃的研究团队认为，从恒星表面大型对流单元的上升流中释放出的超高温等离子体，在穿过高温大气到达温度较低的外层大气时，降温冷却形成了尘埃颗粒，进而产生了尘埃云。从2019年末开始，这些尘埃云阻挡了大约四分之一从恒星表面射出的光线，直到2020年4月，恒星才恢复了正常亮度。 参宿四是一颗年迈的红超巨星，由于它的内核中复杂而变化多端的核聚变反应，参宿
While appearing as a delicate and light veil draped across the sky, this image from the NASA/ESA Hubble Space Telescope actually depicts a small section of the Cygnus supernova blast wave, located around 2,400 light-years away. The name of the supernova remnant comes from its position in the norther
This image from the NASA/ESA Hubble Space Telescope features the spectacular galaxy NGC 2442, nicknamed the Meathook galaxy owing to its extremely asymmetrical and irregular shape. This galaxy was host to a supernova explosion spotted in March 2015, known as SN 2015F, that was created by a white dwa
2020年8月14日 NGC 5189: An Unusually Complex Planetary Nebula Image Credit: NASA, ESA, Hubble, HLA; Reprocessing & Copyright: Jesús M. Vargas Explanation: Why is this nebula so complex? When a star like our Sun is dying, it will cast off its outer layers, usually into a simple overall shape. Somet
The barred spiral galaxy known as NGC 4907 shows its starry face from 270 million light-years away to anyone who can see it from the Northern Hemisphere. This is a new image from the NASA/ESA Hubble Space Telescope of the face-on galaxy, displaying its beautiful spiral arms, wound loosely around its
Astronomers using a previously captured Hubble imagery spotted a remarkable image of a young star’s unseen, planet-forming disk casting a huge shadow across a more distant cloud in a star-forming region. The star is called HBC 672, and the shadow feature was nicknamed the “Bat ShadowR
2020 June 30 Bright Planetary Nebula NGC 7027 from Hubble Image Credit: NASA, ESA, Joel Kastner (RIT) et al.; Processing: Alyssa Pagan (STScI) Explanation: What created this unusual planetary nebula? NGC 7027 is one of the smallest, brightest, and most unusually shaped planetary nebulas known. Given
