# 그림:M57 The Ring Nebula.JPG

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## [edit] Summary

NASA image of M57, the Ring Nebula, taken from English Wikipedia.

Image Credit: NASA and The Hubble Heritage Team (STScI/AURA) [1]

Object: Planetary nebula M57, the Ring Nebula, in Lyra constellation

Image info: The color image was assembled from three black-and-white photos taken through different color filters with the Hubble telescope's Wide Field Planetary Camera 2

Details:

- Blue isolates emission from very hot helium, which is located primarily close to the hot central star.
- Green represents ionized oxygen, which is located farther from the star.
- Red shows ionized nitrogen, which is radiated from the coolest gas, located farthest from the star.

The gradations of color illustrate how the gas glows because it is bathed in ultraviolet radiation from the remnant central star (hot white dwarf), whose surface temperature is a white-hot 120,000 degrees Celsius/

## [edit] External Links

- M57 at ESA/Hubble

## [edit] Source

- http://hubblesite.org/newscenter/archive/releases/1999/01/image/a/

## [edit] Licensing

| This file is in the public domain because it was created by NASA and the European Space Agency. Hubble material is copyright-free and may be freely used as in the public domain without fee, on the condition that NASA and ESA is credited as the source of the material. The material was created for NASA by STScI under Contract NAS5-26555 and for ESA by the Hubble European Space Agency Information Centre. [2] or [3]. |

## 그림 링크

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