万圣节与巫师星云

万圣节与巫师星云

ByNASA中文

2023年10月31日 Halloween and the Wizard Nebula Image Credit & Copyright: Richard McInnis Explanation: Halloween’s origin is ancient and astronomical. Since the fifth century BC, Halloween has been celebrated as a cross-quarter day, a day halfway between an equinox (equal day / equal night) and a solstice (minimum day / maximum night in the northern hemisphere). With a modern calendar however, even though Halloween occurs today, the real cross-quarter day will occur next week. Another cross-quarter day is Groundhog Day. Halloween’s modern celebration retains historic roots in dressing to scare away the spirits of the dead. Perhaps a fitting tribute to this ancient holiday is this closeup view of the Wizard Nebula (NGC 7380). Visually, the interplay of stars, gas, and dust has created a shape…

万圣节与鬼头星云

万圣节与鬼头星云

ByNASA中文

2021年10月24日 Halloween and the Ghost Head Nebula Image Credit: Mohammad Heydari-Malayeri (Observatoire de Paris) et al., ESA, NASA Explanation: Halloween’s origin is ancient and astronomical. Since the fifth century BC, Halloween has been celebrated as a cross-quarter day, a day halfway between an equinox (equal day / equal night) and a solstice (minimum day / maximum night in the northern hemisphere). With a modern calendar however, even though Halloween occurs next week, the real cross-quarter day will occur the week after. Another cross-quarter day is Groundhog Day. Halloween’s modern celebration retains historic roots in dressing to scare away the spirits of the dead. Perhaps a fitting tribute to this ancient holiday is this view of the Ghost Head Nebula taken with the Hubble Space Telescope….

猎户腰带以北

猎户腰带以北

ByNASA中文

2020年11月5日 North of Orion’s Belt Image Credit & Copyright: Terry Hancock (Grand Mesa Observatory) Explanation: Bright stars, interstellar clouds of dust and glowing nebulae fill this cosmic scene, a skyscape just north of Orion’s belt. Close to the plane of our Milky Way Galaxy, the wide field view spans just under 5 degrees or about 10 full moons on the sky. Striking bluish M78, a reflection nebula, is at the lower right. M78’s tint is due to dust preferentially reflecting the blue light of hot, young stars. In colorful contrast, the red swath of glowing hydrogen gas streaming through the center is part of the region’s faint but extensive emission nebula known as Barnard’s Loop. At upper left, a dark dust cloud forms a prominent…

战栗之星系

战栗之星系

ByNASA中文

2020年10月31日 A Galaxy of Horrors Poster Illustration Credit: NASA, JPL-Caltech, The Galaxy of Horrors Explanation: Explore extreme and terrifying realms of the Universe tonight. If you dare to look, mysterious dark matter, a graveyard galaxy, zombie worlds, and gamma-ray bursts of doom are not all that awaits. Just follow the link and remember, it’s all based on real science, even the scary parts. Have a safe and happy halloween! Tomorrow’s picture: day of the trifid 战栗之星系 海报提供: NASA, JPL-Caltech, The Galaxy of Horrors 说明: 今晚，且让我们探索宇宙令人极端战栗的角落。如果你敢看的话，神秘的暗物质、墓园星系、僵尸行星、以及带来绝灭的伽玛射线爆发，只是其中部分景色。请点选此联结，同时也请谨记这些全是真的，就连引人觳觫的天体，也全都有真实的科学根据。祝你有个安全和快乐的万圣节。 明日的图片: day of the trifid

幽灵状的面纱星云

幽灵状的面纱星云

ByGotthew

2019 October 31 The Ghostly Veil Nebula Image Credit & Copyright: Anis Abdul Explanation: A ghostly visage on a cosmic scale, these remains of shocked, glowing gas haunt planet Earth’s sky toward the constellation of Cygnus and form the Veil Nebula. The nebula itself is a large supernova remnant, an expanding cloud born of the death explosion of a massive star. Light from the original supernova explosion likely reached Earth over 5,000 years ago. Also known as the Cygnus Loop, the Veil Nebula now spans nearly 3 degrees or about 6 times the diameter of the full Moon. That translates to over 70 light-years at its estimated distance of 1,500 light-years. In fact, the Veil is so large its brighter parts are recognized as separate…