The Ring Nebula (also catalogued as Messier 57, M57 and NGC 6720) is a planetary nebula in the northern constellation of Lyra. [4] Such a nebula is formed when a star, during the last stages of its evolution before becoming a white dwarf, expels a vast luminous envelope of ionized gas into the surrounding interstellar space.

2023年8月21日 · NASA’s James Webb Space Telescope has observed the well-known Ring Nebula in unprecedented detail. Formed by a star throwing off its outer layers as it runs out of fuel, the Ring Nebula is an archetypal planetary nebula. Also known as M57 and NGC 6720, it is relatively close to Earth at roughly 2,500 light-years away.

2023年8月21日 · Formed by a star throwing off its outer layers as it runs out of fuel, the Ring Nebula is an archetypal planetary nebula. The object is also known as M57 and NGC 6720, and is relatively close to Earth at roughly 2,500 light-years away.

2025年1月21日 · We present the first interferometric imaging of molecular line emission from the Ring Nebula, NGC~6720, in the form of Submillimeter Array (SMA) observations of CO J = 2 → 1 emission.

2023年8月17日 · We present JWST images of the well-known planetary nebula NGC 6720 (the Ring Nebula), covering wavelengths from 1.6 μ m to 25 μ m. The bright shell is strongly fragmented with some 20 000 dense globules, bright in H 2, with a characteristic diameter of 0.2 arcsec and density nH ∼105 - 106 cm −3.

2013年9月15日 · This Hubble Space Telescope image of the Ring Nebula, NGC 6720, shows the distinctive shape of the glowing remains of a Sun-like star. The image reveals that the nebula is more complex than astronomers previously thought. The lithograph text and back image explain how planetary nebulas form and have varied shapes.

Messier 57 (NGC 6720), also known as the Ring Nebula, is a planetary nebula located in the constellation Lyra, in the Orion Arm of the Milky Way Galaxy in the Local Group of galaxies. M57 is 2500 light years away from Earth. M57 is best viewed during early spring, is magnitude 8.8, and can be viewed with binoculars.

2020年4月10日 · Messier 57, also known as M57, NGC 6720 and the Ring Nebula, is a very well known planetary nebula. It has been thoroughly studied. Its exact distance was not precisely known until 2018, when the GAIA satellite determined it to be 2,283 light years. Usual images of M57 show mostly the central “ring”, together with the central star.

1997年12月17日 · NGC 6720. This image is a part of the Hubble Gallery of Planetary Nebulae. Credit: Howard Bond (ST ScI) and NASA/ESA. Usage of ESA/Hubble Images and Videos Are you a journalist? Subscribe to the ESA/Hubble Media Newsletter. About the Image. NASA press release. Id: opo9738c18: Type: Observation: Release date:

2020年6月30日 · The Ring Nebula, also known as M57 or NGC 6720, is found in the constellation Lyra. A spherical shell of glowing gas surrounds a central hot star. The nebula was formed when the central star ejected perhaps as much as ten percent of its mass, over a period of some millions of years.