Galactic Astronomy
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Topics of this game:
- how much the lines in a spectrum are shifted to the red because of the expansion of the universe
- galaxies whose centers contain a supermassive black hole
- a galaxy that has a generally elliptical shape and that has no apparent internal structure or spiral arms
- a galaxy in which the stars and gas clouds are concentrated mainly in one or more spiral arms.
- a galaxy with no specific form and a relatively low mass
- a pattern of lines or rays radiating from a central object or source of light
- a place in space where gravity pulls so much that even light can not get out
- dark matter particles that move slowly and cover only small distances
- dark matter particles that easily move fast and far
- the force that causes the rate of expansion of our universe to accelerate over time
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