The current theory of the solar system in which Earth and the other planets revolve around the sun is called

The distance that light travels in one year, about 6 trillion miles is called

What is a grouping of stars and planets are concentrated mainly in one or more spiral arms is called

A former theory of the universe in which the Earth is at the center of the revolving planets is called

What is a huge group of stars and their planets bound together by gravity called

What is the theory called that the Universe began with an initial explosion that resulted in the formation and expansion of the Universe called?

What is ALL of space and EVERYTHING in it (everything beyond Earth) called?

What is a grouping of stars and planets clumped together in a regular, oval shape called

A spiral galaxy in which our solar system is located is called?

A grouping of stars and their planets with an undefined shape, have many young stars is called

What has a spherical shape, and must orbit a star called

What is the smallest planet, closest to the sun?

What is the fourth planet from the sun, has polar icecap and volcanoes?

What is the hottest planet and considered Earth's twin?

Which planet has liquid water and life?

Which planet has a very thin atmosphere with extreme daytime and nighttime temperatures?

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