space - red shift Flashcards
1
Q
what does the red shift tell us
A
that the galaxies are moving further away from each other meaning the light waves are stretched
2
Q
what is the red shift like for galaxies which are further away
A
greater red shift
3
Q
what does the fact that galaxies which are further away are moving faster then nearby galaxies provide evidence for
A
that the universe is expanding
4
Q
what do scientists believe the universe stared as
A
a very small region which was extremely hot and dense
5
Q
what theory is this
A
the Big Bang theory
6
Q
what did observations of supernovas show
A
that the rate of expansion is increasing
7
Q
what is dark matter and dark energy
A
matter and energy which we can’t detect
