Cosmos - Research Article from Macmillan Science Library: Mathematics

This encyclopedia article consists of approximately 9 pages of information about Cosmos.
This section contains 2,624 words
(approx. 9 pages at 300 words per page)
Buy the Cosmos Encyclopedia Article

Novae and Supernovae

When a star with a mass about the same as our Sun reaches the end of its life, its outer layers slough off, leaving behind a solid carbon core. This core, known as a "white dwarf," is very small, about the size of a small planet. Initially, the core is extremely hot with a temperature of over one million kelvin, although it does eventually cool off. It is also very dense, packing half the mass of the Sun into a sphere the size of Earth or smaller.

The star death of Nova Cygni 1992, seen here in an ultraviolet image with a ring-like shell of gas surrounding it, occurred in May 1993. The star death of Nova Cygni 1992, seen here in an ultraviolet image with a ring-like shell of gas surrounding it, occurred in May 1993.

Sometimes, the white dwarf can be part of a binary star system. The brightest star in our night sky, Sirius, is an example of this kind of system. Sirius has a white dwarf companion called Sirius...

(read more)

This section contains 2,624 words
(approx. 9 pages at 300 words per page)
Buy the Cosmos Encyclopedia Article
Copyrights
Macmillan Science Library: Mathematics
Cosmos from Macmillan Science Library: Mathematics. Copyright © 2001-2006 by Macmillan Reference USA, an imprint of the Gale Group. All rights reserved.
Follow Us on Facebook