gingadan.com

IC 5148 (Planetary Nebula)


Home > Nebula > IC5148
Down
Movie

IC 5148
Planetary Nebula (惑星状星雲)
Nb PN

別名 (Other names)
IC 5150, PK 2-52.1, PSCz P21565-3937, ESO 344-5, IRAS 21565-3937

明るさ (Brightness)
11等級

星座 (Constellation)
つる座 (Gru) (Grus)


距離 (Distance)
3,000光年 (3,000 light-years)

IC 5148 is a planetary nebula located 3,000 light years from the Earth in the constellation Grus.

IC 5148 (Planetary Nebula) : Picture

IC 5148 (Planetary Nebula)
IC 5148 (Planetary Nebula)
(C) ESO
IC 5148 is a beautiful planetary nebula located some 3000 light-years away in the constellation of Grus. The nebula has a diameter of a couple of light-years, and it is still growing at over 50 kilometres per second — one of the fastest expanding planetary nebulae known. The term “planetary nebula” arose in the 19th century, when the first observations of such objects — through the small telescopes available at the time — looked somewhat like giant planets. However, the true nature of planetary nebulae is quite different.

When a star with a mass similar to or a few times more than that of our Sun approaches the end of its life, its outer layers are thrown off into space. The expanding gas is illuminated by the hot remaining core of the star at the centre, forming the planetary nebula, which often takes on a beautiful, glowing shape. 

When observed with a smaller amateur telescope, this particular planetary nebula shows up as a ring of material, with the star — which will cool to become a white dwarf — shining in the middle of the central hole. This appearance led astronomers to nickname IC 5148 the Spare Tyre Nebula.

The ESO Faint Object Spectrograph and Camera (EFOSC2) on the New Technology Telescope at La Silla gives a somewhat more elegant view of this object. Rather than looking like a spare tyre, the nebula resembles ethereal blossom with layered petals.

IC 5148 (Planetary Nebula)
IC 5148 (Planetary Nebula)
(C) ESO
Up
Up

IC 5148 (Planetary Nebula) : Movie

Up
Home > Nebula > IC5148
Up

gingadan.com ブログパーツ