Astro test 5 UPDATED Exam Questions and CORRECT Answers

Astro test 5 UPDATED Exam Questions and
CORRECT Answers
observational evidence for a supermassive black hole at the center of the Milky Way -
CORRECT ANSWER -


determine mass of supermassive black hole at center of milky way - CORRECT
ANSWER -



characteristics of local group - CORRECT ANSWER -



future of milky way - CORRECT ANSWER -



evidence milky way is in halo of dark matter - CORRECT ANSWER -



harlow shapley - approximate size of milky way - CORRECT ANSWER -



harlow shapley - earth's location in milky way - CORRECT ANSWER -


movements, elemental abundances, stellar ages, and star formation rates in various parts of milky
way (halo, bulge, and thin/thick disks) - CORRECT ANSWER -



Cosmological Principle - CORRECT ANSWER -



homogeneous - CORRECT ANSWER -



isotropic - CORRECT ANSWER -

,hubble flow - CORRECT ANSWER -



observers in other galaxies see galaxies moving wrt them - CORRECT ANSWER -



look-back time - CORRECT ANSWER -



hubble time - CORRECT ANSWER -



scale factor - CORRECT ANSWER -



cosmological redshift - CORRECT ANSWER -


cosmological redshift affect light from distant galaxies (determine how many times bigger
universe is than when it was emitted) - CORRECT ANSWER -


Cosmic Microwave Background

discovery, source, what the variations tell us - CORRECT ANSWER -


critical density

what happens when universe mass density is <,>,= - CORRECT ANSWER -



determine universe's expansion accelerating - CORRECT ANSWER -



cause of universe expansion accelerating - CORRECT ANSWER -


cosmological constant/dark energy affect evolution of universe

effects if 0, >, or < than now - CORRECT ANSWER -

, flatness & horizon problems

inflation as solution - CORRECT ANSWER -



four fundamental forces - CORRECT ANSWER -



relative strength of fundamental forces - CORRECT ANSWER -



range of forces (infinite or short distance) - CORRECT ANSWER -



particles carry forces - CORRECT ANSWER -



what do the forces do - CORRECT ANSWER -



Grand Unified Theory/Theory of Everything - CORRECT ANSWER - theory that unifies
and explains the strong, weak, and electromagnetic interactions


structure/size of universe
include galaxy groups, galaxy clusters, galaxy superclusters, voids, walls - CORRECT
ANSWER -



evidence that galaxy superclusters dominated by dark matter - CORRECT ANSWER -


detect dark matter through
observing single galaxy in cluster
observing hot gas in cluster

observing gravitationally lensed galaxy - CORRECT ANSWER -