Universe Structure & The Big Bang

Front

What is the estimated age of the universe according to the Big Bang Theory?

Back

14 billion years.

Front

List the celestial features in order of increasing size.

Back

planet -- solar system -- galaxy -- universe.

Front

What is a large body made of gas or rock that orbits around a star?

Back

planet.

Front

What is a large celestial body that is composed of plasma (hot gas) and gives off light?

Back

star.

Front

What is true about the movement of galaxies?

Back

The galaxies are moving away from us.

Front

What is the Big Bang Theory?

Back

A scientific explanation for the origin of the universe, suggesting it began from a singular point and has been expanding ever since.

Front

What is a galaxy?

Back

A massive system of stars, stellar remnants, interstellar gas, dust, and dark matter, bound together by gravity.

Front

What is a solar system?

Back

A collection of celestial bodies, including a star and the objects that orbit it, such as planets, moons, asteroids, and comets.

Front

What is a star?

Back

A luminous celestial body made of plasma that generates energy through nuclear fusion.

Front

What is a planet?

Back

A celestial body that orbits a star, is spherical in shape, and has cleared its orbit of other debris.