1)Measurements of distances to Type Ia supernovae indicate that no Type Ia super
ID: 304975 • Letter: 1
Question
1)Measurements of distances to Type Ia supernovae indicate that
no Type Ia supernovae are occuring at the present time
2) Which of the following is not likely to be found in the thin disk of a Spiral galaxy?
3) Which of the following is not a strong argument for the theory that some large elliptical galaxies formed as the result of galaxy collisions?
Some elliptical galaxies are surrounded by shells of stars.
4)What important effect did the massive stars that formed first in the protogalactic cloud have on the future development of the protogalactic cloud?
there is very little helium gas between the galaxies that have Type Ia supernovae the expansion of the universe is accelerating almost all of the Type Ia supernovae are forming at about the same distance from the Milky Way galaxyno Type Ia supernovae are occuring at the present time
2) Which of the following is not likely to be found in the thin disk of a Spiral galaxy?
open cluster young star dust globular cluster3) Which of the following is not a strong argument for the theory that some large elliptical galaxies formed as the result of galaxy collisions?
Computer simulations predict that the product of a galaxy collision is generally an elliptical galaxy. Some ellipticals have stars and gas that rotate opposite to the rest of the galaxy. Elliptical galaxies dominate the population in dense galaxy clusters. Galaxy collisions are common and most galaxies in the universe are elliptical.Some elliptical galaxies are surrounded by shells of stars.
4)What important effect did the massive stars that formed first in the protogalactic cloud have on the future development of the protogalactic cloud?
The large amount of light radiated by these very hot, massive, stars ionized the gas in the protogalactic cloud and prevented further collapse of the protogalactic cloud. The massive stars became supernovae which heated the surrounding gas of the protogalactic cloud and slowed its collapse. The large amount of light radiated by these very hot, massive, stars caused molecules to form in the protogalactic cloud and led to the formation of planets in the protogalactic cloud. The large gravity of these massive stars pulled in gas from the protogalactic cloud and increased the rate of collapse of the protogalactic cloud.Explanation / Answer
Answers
1.The expansion of the universe is accelerating.
2.Globular cluster
The Spiral galaxies contain mainly three feature (1)Bulge(2) Disk (3) Halo.The Bulge contain older star found in the center of the galaxy with sperical formation.The disk is made up of dust, gas, and younger stars known as open cluster beacuse the stars are loosely bound by gravitational atractive force in thin diskof spiral galexy. The disk forms arm like structures ,it is a outer part of spiral galexy. The Halo of a galaxy is surrounded part of bulge which is loose, spherical structure. The halo contains old clusters of stars, known as globular clusters.
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