Astronomy 123 Homework - Assignment Example

Astronomy 123 Homework Astronomy Question 1. Galaxy Radical Velo 8204+6563 =14,767 Galaxy 2 Radical Velo 6,563+6,549 =13,112Question 2C, B and L are the same because they can all react Question 3The evidences of the existence of the dark energy are explained by the observational Hubble constant data, late-time integrated Sachs-Wolfe effect, Supernovae, Cosmic microwave background and the Large-scale structure. It is supported by the hypotheses of cosmological constant and quintessence. Each of these provides an elaborate argument for its existence.

Question 4There is a very big difference between the top-down and bottom-up processes in the formation of galaxies and other structures. In top-down, the galaxies are formed when the dark matter becomes the most dominant feature. Besides, it takes place in the presence of larger units which do split into smaller particles to enable the formation of the galaxies. On the other hand, bottom-up formation takes place when there are smaller elements which then come together to form larger units to facilitate the formation of these structures.

This is a clear indication that these processes take place in different conditions. Question 5Modified Newtonian Dynamics (MOND) is a theory that states that Newton’s Laws can be applied to explain different properties of the galaxies. Since it more clear and has a lot of evidence and information, it can be used as a credible alternative of the Dark Matter which is still subject to lots of researches to prove what it actually is and determine if it truly exists.