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The Big Bang is what astronomers believe to be the origin of the universe. [©Jupiter Images, 2010]

Science and Engineering » Space Sciences

What was the Big Bang?

Learn what the Big Bang was and read about its theories.

Pulsars form when a star with 1.4 to four times the mass of the sun collapses. [©Jupiter Images, 2010]

Science and Engineering » Space Sciences

What is a pulsar?

Learn about what a pulsar is and who first detected them.

Solar eclipses happen the moon passes between the sun and Earth. [©Jupiter Images, 2010]

Science and Engineering » Space Sciences

When do solar eclipses happen?

Find out when solar eclipses happen and what causes them.

The Maunder minimum is named after E. Walter Maunder. [©Jupiter Images, 2010]

Science and Engineering » Space Sciences

What is the Maunder minimum?

Find out what the Maunder minimum is and when it was established.

The ecliptic is closer to the horizon in autumn. [©Jupiter Images, 2010]

Science and Engineering » Space Sciences

What is the ecliptic?

Find out what the ecliptic is and its position in the sky.

The sun is made of mostly hydrogen. [©Jupiter Images, 2010]

Science and Engineering » Space Sciences

What is the sun made of?

Learn about what the sun is made of.

The sun is approximately 4.5 billion-years-old. [©Jupiter Images, 2010]

Science and Engineering » Space Sciences

When will the sun die?

Find out when the sun will die and what will happen to Earth.

The Milky Way is estimated to contain 100 billion stars. [©Jupiter Images, 2010]

Science and Engineering » Space Sciences

What is the Milky Way?

Find out what the Milky Way is and how old scientists think it is.

The North Star is also known as Polaris. [©Jupiter Images, 2010]

Science and Engineering » Space Sciences

Where is the North Star?

Find out where the North Star is and its relation to the North Pole.

The Big Dipper is part of the constellation Ursa Major. [©Jupiter Images, 2010]

Science and Engineering » Space Sciences

What is the Big Dipper?

Learn about what the Big Dipper is and where it can be seen.

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