标签: 行星状星云

银河中心的电波弧

2023年4月3日 The Galactic Center Radio Arc Image Credit: Ian Heywood (Oxford U.), SARAO; Explanation: What causes this unusual curving structure near the center of our Galaxy? The long parallel rays slanting across the top of the featured radio image are known collectively as the Galactic Center Radio Arc and point out from the Galactic plane. The Radio Arc is ...

哈勃影像: 环状星云M57

2023年4月2日 M57: The Ring Nebula from Hubble Image Credit: NASA, ESA, Hubble Legacy Archive; Processing: Judy Schmidt Explanation: It was noticed hundreds of years ago by stargazers who could not understand its unusual shape. It looked like a ring on the sky. Except for the rings of Saturn, the Ring Nebula (M57) may be the most famous celestial circle. We now ...

蛇妖星云

2023年3月17日 The Medusa Nebula Image Credit & Copyright: Martin Bradley Chesterfield Astronomical Society Explanation: Braided and serpentine filaments of glowing gas suggest this nebula’s popular name, The Medusa Nebula. Also known as Abell 21, this Medusa is an old planetary nebula some 1,500 light-years away in the constellation Gemini. Like its ...

行星状星云Jones-Emberson 1

2023年2月24日 Jones-Emberson 1 Image Credit & Copyright: Serge Brunier, Jean-François Bax, David Vernet, C2PU/OCA Explanation: Planetary nebula Jones-Emberson 1 is the death shroud of a dying Sun-like star. It lies some 1,600 light-years from Earth toward the sharp-eyed constellation Lynx. About 4 light-years across, the expanding remnant of the dying star...

NGC 6164: 龙蛋星云及其外晕

2022年12月26日 NGC 6164: Dragon’s Egg Nebula and Halo Image Credit & Copyright: Russell Croman Explanation: The star at the center created everything. Known as the Dragon’s Egg, this star — a rare, hot, luminous O-type star some 40 times as massive as the Sun — created not only the complex nebula (NGC 6164) that immediately surround...

NGC 7293:螺旋星云

2022年12月7日 NGC 7293: The Helix Nebula Image Credit & Copyright: Tommaso Stella Explanation: A mere seven hundred light years from Earth, toward the constellation Aquarius, a sun-like star is dying. The dying star’s last few thousand years have produced the Helix Nebula (NGC 7293), a well studied and nearby example of a Planetary Nebula, typical of...

韦伯的南环状星云

2022年7月14日 Webb’s Southern Ring Nebula Image Credit: NASA, ESA, CSA, STScI, NIRCam Explanation: Cataloged as NGC 3132 the Southern Ring Nebula is a planetary nebula, the death shroud of a dying sun-like star some 2,500 light-years from Earth. Composed of gas and dust the stunning cosmic landscape is nearly half a light-year in diameter, explored in unp...

行星状星云Abell 7

2022年5月21日 Planetary Nebula Abell 7 Image Credit & Copyright: Donald Waid, Ron Dilulio Explanation: Very faint planetary nebula Abell 7 is some 1,800 light-years distant, just south of Orion in planet Earth’s skies in the constellation Lepus, The Hare. Surrounded by Milky Way stars and near the line-of-sight to distant background galaxies, its gen...

蛇妖星云

2022年3月25日 The Medusa Nebula Image Credit & Copyright: Damien Cannane Explanation: Braided and serpentine filaments of glowing gas suggest this nebula’s popular name, The Medusa Nebula. Also known as Abell 21, this Medusa is an old planetary nebula some 1,500 light-years away in the constellation Gemini. Like its mythological namesake, the nebula ...

见光及X射线波段的猫眼星云

2021年11月07日 The Cat’s Eye Nebula in Optical and X-ray Image Credit: NASA, ESA, Hubble Legacy Archive; Chandra X-ray Obs.; Processing & Copyright: Rudy Pohl Explanation: To some it looks like a cat’s eye. To others, perhaps like a giant cosmic conch shell. It is actually one of brightest and most highly detailed planetary nebula known, compose...