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发帖数: 1994 | 1 Spiral Galaxy NGC 300
Credit: M. Schirmer (IAEF, Bonn), W. Gieren (Univ. de Concepcisn, Chile), et al., ESO
Explanation: NGC 300 is so interesting because it is so normal. An Sc-type spiral galaxy in the
nearby Sculptor group of galaxies, NGC 300 shows typical flowing blue spiral arms, an expected
compact nucleus, and the requisite amount of stars, star clusters, and nebulae. Therefore,
studying NGC 300 should indicate how, exactly, a normal spiral galaxy works. Toward this goal,
NGC 300 and t | s*****t
发帖数: 1994 | 2 Spiral Galaxy NGC 7742
Credit : Hubble Heritage Team (AURA/ STScI/ NASA)
Explanation: This might resemble a fried egg you've had for breakfast, but it's actually much
larger. In fact, ringed by blue-tinted star forming regions and faintly visible spiral arms, the
yolk-yellow center of this face-on spiral galaxy, NGC 7742, is about 3,000 light-years across.
About 72 million light-years away in the constellation Pegasus, NGC 7742 is known to be a
Seyfert galaxy - a type of active spir |
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