Galaxies, part 1

Front

What is the name of our home galaxy?

Back

the Milky Way

Front

In the early 20th Century, "faint fuzzies" displaying a variety of shapes in the sky were simply called ___

Back

nebulae

Front

Which astronomer argued, in 1920, that "the Milky Way was all there is"?

Back

Harlow Shapley

Front

Which astronomer argued, in 1920, that the Milky Way was just one of many galaxies?

Back

Heber Curtis

Front

Shapley erroneously noted that one of the spiral nebulae had been seen to rotate, so it must be ___

Back

small

Front

Which astronomers "unlocked the mystery" of spiral nebulae in the 1920's?

Back

Edwin Hubble and Milton Humason

Front

In the 1920's, what type of pulsating stars were observed in the spiral nebula M31 in Andromeda?

Back

Cepheid variables

Front

For Cepheid variables, the time it takes them to pulse is directly related to their ___

Back

luminosity

Front

If you can measure the period of Cepheid variables, you can determine how far away they are simply by ___

Back

measuring their apparent brightness

Front

In the 1920's it was determined that the "Great Andromeda Nebula" was actually ___

Back

an entirely separate galaxy