The name of the prominant theory describing the formation of the universe.
What is the big bang?
100
We need to know more about this before we can predict the fate of the universe.
What is dark energy?
200
Recessional speed is calculated using _______ found in the spectra of stars or galaxies
What are redshifts?
200
Plotted the galaxy with globular clusters.
Who is Harlow Shapely?
200
Which kind of galaxy has arms with newer stars and centers with older stars?
What are spiral galaxies?
200
What is the point called from which all space, time, and matter emerged?
What is a cosmic singularity?
200
This is how we know dark energy exists
What is the cause of expansion of the universe
300
Determined the relationship between distance and recessional speed of galaxies.
Who is Hubble?
300
Location of sun
What is 2/3 of the way out on the Orion arm.
300
Which kind of galaxy has the least star formation occuring?
What are elliptical galaxies?
300
Name two pieces of evidence that support the big bang theory.
What is
1. recession velocity of galaxies
2. cosmic background radiation
3. relative abundances of elements in the universe
300
If expansion slows and then the universe contracts again there will be a big __________, if it expands again after that there will be a big ___________.
What is crunch and bounce
400
Universe is made of ______ dark energy
What is over 70%
400
Diameter of our galaxy.
What is 100,000 light years?
400
How do we know galaxies are moving away from us?
What are their redshifts?
400
What is the time period just after the big bang called?
What is inflationary period.
400
What determines the difference between a big freeze and big rip?
the speed of the galaxies. >c or < c
500
Picture taken of one small square of space in 1995 containing more than 2500 galaxies.
What is the Hubble Deep Field.
500
Evidence for dark matter within our galaxy.
There is not enough matter we see to create enough gravity to explain the high of a rotational velocity of stars.
500
Once two galaxies merge they form a strange looking thing called