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MyCn18 (Hourglass Nebula)


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MyCn18
Planetary Nebula (惑星状星雲)
Hourglass Nebula (砂時計星雲)
Nb PN


別名 (Other names)
ESO 97-1, Engraved Hourglass Nebula, Etched Hourglass Nebula, PN MyCn 18

距離 (Distance)
8,000光年 (8,000 light-years)

星座 (Constellation)
はえ座 (Mus) (Musca)

Hourglass Nebula (MyCn18) is a planetary nebula located 8,000 light years from the Earth in the constellation Musca.

MyCn18 (Hourglass Nebula) : Picture

MyCn18: An Hourglass Planetary Nebula
MyCn18: An Hourglass Planetary Nebula
(C) R. Sahai and J. Trauger (JPL), WFPC2, HST, NASA
The sands of time are running out for the central star of this hourglass-shaped planetary nebula. With its nuclear fuel exhausted, this brief, spectacular, closing phase of a Sun-like star's life occurs as its outer layers are ejected - its core becoming a cooling, fading white dwarf. In 1995, astronomers used the Hubble Space Telescope (HST) to make a series of images of planetary nebulae, including the one above. Here, delicate rings of colorful glowing gas (nitrogen-red, hydrogen-green, and oxygen-blue) outline the tenuous walls of the hourglass. The unprecedented sharpness of the HST images has revealed surprising details of the nebula ejection process that are helping to resolve the outstanding mysteries of the complex shapes and symmetries of planetary nebulas.

Hourglass Nebula (MyCn18)
Hourglass Nebula (MyCn18)
(C) NASA
The Hourglass Nebula (MyCn18) is a young planetary nebula located about 8,000 light years away. This artificially colorized image was taken with the Wide Field and Planetary Camera 2 aboard NASA's Hubble Space Telescope.

MyCn18 MyCn18
MyCn18
(C) NASA
MyCn18
(C) NASA
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