What evidence supports the theory that elliptical galaxies come from denser clouds?

A) Elliptical galaxies are denser than spiral galaxies.
B) Elliptical galaxies are generally larger than spiral galaxies.
C) Elliptical galaxies at high redshifts lack young, blue stars.
D) Elliptical galaxies have more gas than spiral galaxies.
E) Elliptical galaxies have denser stars than spiral galaxies.


C

Physics & Space Science

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Astronomers believe that most of the matter that makes up the universe is not detected by any part of the electromagnetic spectrum. This mysterious matter is called ______________

Fill in the blank(s) with correct word

Physics & Space Science

A metal bar is used to conduct heat. When the temperature at one end is 100°C and at the other is 20°C, heat is transferred at a rate of 32 J/s. The bar is then stretched uniformly to twice its original length. If again it has ends at 100°C and 20°C, at what rate will heat be transferred between it ends?

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Physics & Space Science

The objective lens of a refracting astronomical telescope has a focal length of 60 cm, and the eyepiece has a focal length of 2.0 cm. How far apart should the lenses be placed in order to form a final image at infinity?

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Physics & Space Science