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A light year is not a measure of time. [©Shutterstock, 2010]

Science and Engineering » Space Sciences

What is a light year?

Learn what a light year is and how it pertains to distance.

Planet X cannot be observed with a telescope. [©Shutterstock, 2010]

Science and Engineering » Space Sciences

What is Planet X?

Read what Planet X is and how it affects other planets.

A syzygy is a very rare celestial event. [©Shutterstock, 2010]

Science and Engineering » Space Sciences

What is a syzygy?

Learn what a syzygy is and how it involves the sun and moon.

The summer triangle can be seen in the Milky Way. [©Jupiter Images, 2010]

Science and Engineering » Space Sciences

What is the summer triangle?

Find out how astrology aligns itself in the warm months.

Hipparchus compiled the first catalog of stars. [©Jupiter Images, 2009]

Science and Engineering » Space Sciences

Who is considered the father of systematic astronomy?

Find out who is considered the father of systematic astronomy.

The father of the Soviet space program was trained as an aeronautical engineer. [©Jupiter Images, 2010]

Science and Engineering » Space Sciences

Who was the father of the Soviet space program?

Find out who the father of the Soviet space program was.

A black hole is so dense that not even light can escape it. [©Jupiter Images, 2010]

Science and Engineering » Space Sciences

What is a black hole?

Find out what a black hole is and who coined the term.

The Earth is an oblate ellipsoida sphere. [©Jupiter Images, 2010]

Science and Engineering » Space Sciences

What is the circumference of the Earth?

Find out what the circumference of the Earth is.

The rotation of the Earth is slower than in years past. [©Jupiter Images, 2010]

Science and Engineering » Space Sciences

Is it true that the rotation speed of the Earth varies?

Find out if it is true that the rotation speed of the Earth varies.

NASA ordinarily bars married couples from traveling to space together. [©Jupiter Images, 2010]

Science and Engineering » Space Sciences

Who were the first married couple to go into space together?

Learn about the first married couple to go into space together.

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