1) the sun is located in the disk of the milky way true or false 2) galaxies did

Question

1) the sun is located in the disk of the milky way
true or false
2) galaxies didn't begin to form 12 billion years after the big bang
why do astronomers think that the universe will expand forever?
a-ther's too much dark mater for gravity to overcome
b- the universe is above the critical density
c- the universe is below the critical density
d- gravity will disapper once all of the stars die out in the distent future
3) where is the nearest super massive black hole?
4) in the spiral arms of the milky way you find
a- only gas and dust
b- new stars forming
c- only old stars
d- only middle- aged stars
5) what is the primary feature of irregular galaxies?
6) the distnation of light as it passes through a strong gravitational field is called ?
7) what do we use Hubble law to measure?

Explanation / Answer

1)true 2)c 3)At a distance of 160 million light years 4)b 5)ellliptical in shape 6)it follows curved path 7)Hubble's law is the name for the astronomical observation in physical cosmology that: (1) all objects observed in deep space (interstellar space) are found to have a doppler shift observable relative velocity to Earth, and to each other; and (2) that this doppler-shift-measured velocity, of various galaxies receding from the Earth, is proportional to their distance from the Earth and all other interstellar bodies

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