Death and birth of stars - Assignment Example

Astronomy Death and birth of stars-Astronomy Cygus X consists of a system of B0 supergiant; a dumping mass into a compact companion. This mass usually orbits the compact companion forming accretion disk. Consisting of the black hole; the gas may fall down towards the black hole gaining momentum and speed in a gravitational field. This gas may collide with other particles turning their velocities very hot. Spiraling into a strong gravitational field, the gas become even hotter and hence emits X-rays in the black hole vicinity.2.  The supernova rates indicate that about three supernovas should explode in our Galaxy in every century.

The last known supernova occurred about 140 years ago in our galaxy. It was not recognized because it occurred close to the galaxy center. Our galaxy has been deficient in production of supernovas because only one has occurred in about 140 years as opposed to the documented probabilities.3. If the Schwarzschild radius of a 1 solar mass black hole is 3 kilometers which corresponds to 1 cm on a one earth mass black hole: Then, RS =3 Km one solar mass→ 1cm one earth mass=RS4. One solar mass pre-main sequence tends to radiate more energy in the conformation of excessive heat: the need to acquire stability.

Less energy is radiated upon entry into main sequence. It reaches equilibrium and becomes opaque. Energy tends to be conserved internally and hence less energy radiated and thus the observed reduction in luminosity. 5. Collision and Fusion force theory: it is proposed that water came to be on earth as a result of bombardment of comets; ‘wet’ asteroids and ice particles. Even though it may seem right, a humongous number of comets would be required to collide and form the huge should have been 6.

36 million with a 40% ice-water as mass. This theory could be misleading because such huge number of comets might not have existed to pass close to earth, collide and form water. It is not clear if they could have produced about 1.33x10^18 tons of all water on earth. Second is the adhesion of water on interstellar dust particles theory. One theory proposed by Dr. Drake has indicated that water was already present on dust particles from the interstellar clouds. This through computer stimulations has established strong evidence that through adhesion forces; it could just be as true that water came to be on earth under such conditions.

These forces were responsible for retention of water on dust particles even under extreme temperatures and pressure. This later joined to form water. This theory poses certain inconsistencies because it’s hard to really very water could have been held for that long on interstellar dust when planets formed.Works CitedHawley, John F. Lectures. Astronomy 1-15 [Word Document]. Adapted from Dept. "Galaxies", Institute of Astronomy. (G.Petrov Feb. 2005). 1999. Astro-99-Lectures. Available online at: http://www.astro.bas.

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