Stars, Galaxies and The Universe

Front

What does the Big Bang theory suggest?

Back

The universe is continually expanding.

Front

What does a star's color indicate?

Back

A star's color indicates its temperature.

Front

Put the stars in order from hottest to coolest: Blue, White, Yellow, Orange, Red.

Back

Blue, White, Yellow, Orange, Red.

Front

According to the Big Bang theory, how old is the universe?

Back

The universe is about 13.7 billion years old.

Front

What was the first element to form within the universe?

Back

Hydrogen.

Front

What is a galaxy?

Back

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

Front

What is a star?

Back

A star is a luminous sphere of plasma held together by its own gravity, undergoing nuclear fusion.

Front

What is the Milky Way?

Back

The Milky Way is the galaxy that contains our solar system.

Front

What is a light-year?

Back

A light-year is the distance that light travels in one year, approximately 5.88 trillion miles.

Front

What is a black hole?

Back

A black hole is a region of space where the gravitational pull is so strong that nothing, not even light, can escape from it.