Astronomy Picture of the Day
Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer.
August 9, 1998
Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer.
August 9, 1998
說明： (太陽這一類) 恆星的 核燃料 耗盡後會怎樣呢? 恆星的中心會凝聚成白矮星， 而外層大氣被 拋入星際之間 形成 行星狀星雲 。 這個 因 著名的天文學家 Harlow Shapley 而命名為 謝普利 - 1 (Shapley 1) 的 行星狀星雲， 外觀有極為顯眼的 環狀結構。 縱然 這類的星雲， 其外觀很像行星 而且也因此得名， 但實際上它們離 本太陽系很遠， 而且是 包圍著其他恆星。
Authors & editors:
Robert Nemiroff
(MTU) &
Jerry
Bonnell (USRA)
NASA Technical Rep.:
Jay Norris.
Specific rights apply.
A service of:
LHEA
at
NASA/
GSFC
&:
Michigan Tech. U.