Question

How are galaxies important to our existence?
A) Without galaxies, there could not have been a Big Bang.
B) Without galaxies, the universe could not be expanding.
C) Galaxies prevent planets from leaving their orbits around stars; e.g., our galaxy prevents Earth from leaving its orbit of the Sun.
D) Galaxies recycle heavy elements produced in stars into future generations of stars.
E) Galaxies provide the gravity that prevents us from falling off Earth.

Answer 1

Answer:

Galaxies recycle material from one generation of stars to the next, and without this recycling we could not exist.

Answer 2

How are galaxies important.

A galaxy is a moving system of stars, interstellar dust, and dark matter. They may consist of a million to a trillion stars. Most of them consist of a supermassive black hole. They may elliptical, spiral, and irregular. The space between the galaxies can be filled by numerous gases.

Thus the answer is galaxies recycle heavy elements produced in stars.

• The galaxies are composed of numerous matter such as dark matter that fills the cosmos and is a collection of stars.

• The galaxies are responsible for the recycling of their own Steller matter and are also responsible for the generation of stars.

• Hence the answer D is correct.

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