Author Question: How do we learn about the conditions at the center of our own galaxy, the Milky Way? A) The gas ... (Read 22 times)

@Brianna17 · **on:** Jul 27, 2018

How do we learn about the conditions at the center of our own galaxy, the Milky Way?

A) The gas and dust in the Milky Way prevent any type of direct observation of the galactic center, but theoretical models allow us to predict what is happening there.
B) We must look at the centers of other (external) galaxies and assume that they are similar to the Milky Way.
C) While we cannot see the galactic center with visible or ultraviolet light, radio and X-rays from the center can be detected and used to determine the conditions there.
D) High-resolution photographs obtained by the Hubble Space Telescope have revealed the galactic center using visible light.

Question 2

What happened to the Impactor of the Deep Impact mission?

A) It landed safely on the surface of the comet and returned material to Earth.
B) It blasted the comet apart, thus preventing a potential Earth collision.
C) It blasted straight through the comet leaving a small hole.
D) It created a small crater on the comet.
E) It missed the comet altogether.