What is the difference between the Solar System, the Galaxy, and the Universe? (Select all that apply.)
a. The universe contains all physical matter and energy except for that within galaxies and Solar Systems.
b. The Solar System contains approximately 100 billion stars, of which the sun is one, as well as large clouds of gas and dust.
c. The Galaxy contains thousands of similar Solar Systems.
d. The Solar System is much larger than the Galaxy but much, much smaller than the universe.
e. The Solar System contains the sun and objects that orbit it, including the eight planets, comets, and asteroids, and the Galaxy contains approximately 100 billion stars, of which the sun is one, as well as large clouds of gas and dust.
f. The universe contains all physical matter and energy. Its basic constituents are the clusters of galaxies

The solar system is the part of the galaxy that contains planets, asteroids belts, comets and different moons. It is bigger than our planet but is smaller than a galaxy.

A galaxy contains several solar systems, and millions of other stars, bigger than even our sun. Actually, our solar system is localized in one arm of our spiral galaxy.

The universe contains all the galaxies that we know by now, with the different astronomic bodies. Since the universe is the biggest concept that take in the rest of the astronomical bodies, it is consider infinite.