Galaxies Shapes
The milky way is this type of galaxy
Spiral Galaxy
As the universe is expanding, its temperature is doing this
Cooling
How much of the universe is dark matter
20-30 percent
What is the equation for redshift changes
Change in Wavelength / Wavelength
Δλ/λ
As the universe expands, the wavelength of the light shifts from X rays to what
Ultraviolet and Visible
Small galaxies are often this type
Irregular Galaxies
If the universe stops expanding it will eventually do what
Collapse
Dark Energy is trying to do this to the expansion of the universe
Accelerate, rather than decrease
What type of stars are typically found in the arms of spiral galxies
Blue, younger, Population 1
When did the Cosmic Microwave Background form
After the Big Bang, before the Stars. About 300,000 after the Big Bang
Which type of galaxy turns into an elliptical galaxy
Spiral Galaxies- formed by possible collision
What would cause a faster expansion rate
High Energy Density, So close that the hit each other more often
If the universe was filled with Dark Energy, would the expansion be faster or slower when the scale factor was smaller?
Slower, if the Scale Factor is larger the expansion Rate Faster for dark energy only
If matter only, than the larger the scale factor the expansion rate is slower. And the smaller the scale factor the expansion rate is faster.
This is described as an additional sort of gravity
Dark Matter
The Supernova data and the spectrum of the Cosmic Microwave Background suggest that the universe started off what
In an extremely hot and dense state
When the universe was first created this type of high energy light was present
X-ray and Gamma Rays
How much of the universe is currently dark energy
70 percent
In negative curvature of the universe, objects appear to be what
Smaller, Closer
What was formed after the formation of the stars
The formation of the earth/planets
Which type of galaxy is better for making new stars
Spiral Galaxies
What is changing in the universe to cause galaxies to appear to 'move' away from each other
Geometry, Size, and Space
What effect does dark energy have on the scale factor of energy density
Scale factor increases while the energy density stays constant
This type of Galaxy combination is when 1 large galaxy consumes 1 small galaxy
Galaxy Cannibalism
What is the temperature of the Cosmic Microwave Background today
2.73 K