Author Question: Which of the following could not be measured by an observation that uses only imaging? A) the ... (Read 47 times)

soccerdreamer_17 · **on:** Jul 27, 2018

Which of the following could not be measured by an observation that uses only imaging?

A) the rate at which a variable star brightens and dims
B) the general shape of an interstellar cloud of gas
C) the color of a planet
D) the brightness of a star in our sky
E) the number of bright stars in a nearby star cluster

Question 2

In the critical universe now proposed, the ratio of matter/energy is about:

A) 50:50.
B) 27:73.
C) 75:25.
D) 10:90.
E) 95:5.