ASTRON 1F03 Study Guide - Quiz Guide: Spiral Galaxy, Sagittarius A*, Solar Mass
11 Dec 2019
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Chapter 14: the milky way: what are galaxies, galaxies are huge collected of gas, dust and billions of stars and their solar systems, at the turn of the century galaxies were called spiral nebulae. What made astronomers decide external galaxies were large objects like the milky way: hubble found a cepheid variable in the andromeda galaxy and used it to put the galaxy. 700,000 parsecs away: this indicates that andromeda must be a vast collection of stars comparable to our. Explain how the way stars and gas rotate around the galaxy implies there is a lot of invisible dark matter present: kepler"s 3rd law implies the milky way has a mass of 100 billion solar masses inside the.
