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Barred spiral galaxy Reference Libraries

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Spiral Galaxy
2004-10-19 04:45:42

Spiral Galaxy -- Among the galaxies, there are apparently three main categories, according to their appearance: the disk galaxies (`cosmic frisbies' according to P. Murdin, D. Allen, and D. Malin), consisting of a huge disk of stars and interstellar matter, which may form interesting patterns, the elliptical galaxies (`cosmic footballs') which are uniformly looking, ellipsoidal agglomerations...

Galaxy
2004-10-19 04:45:41

Galaxy -- Stars are almost always found in collections called galaxies, together with gas, dust, and large amounts of dark matter detected by its gravitational effects. These are all held together by gravitational attraction and orbit a common centre. There is some evidence that black holes may exist at the centre of some or most galaxies. Galaxies come in three main types: ellipticals,...

Word of the Day
filiation
  • The relation of a son or daughter to a parent: the correlative of paternity.
  • The establishment of a filial relation, specifically by adoption.
  • In law, the judicial determination of the paternity of a child, especially of a bastard; affiliation.
The word 'filiation' comes from a Latin word meaning 'legal right of a son'.
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