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The brightness of a star is called its magnitude. [©Jupiter Images, 2010]

Science and Engineering » Space Sciences

Which stars are the brightest?

Read about which stars are the brightest.

The sun is 93 million miles away from Earth. [©Jupiter Images, 2010]

Science and Engineering » Space Sciences

Which star is the closest to earth?

Find out which star is the closest to Earth.

A binary star is a pair of stars revolving around a common center of gravity. [©Jupiter Images, 2010]

Science and Engineering » Space Sciences

What is a binary star?

Learn what binary stars are and what makes them unique.

The color of a star indicates its temperature and age. [©Jupiter Images, 2010]

Science and Engineering » Space Sciences

What does the color of a star indicate?

Find out what the color of a star indicates.

The Viking Lander indicated there is no life on Mars. [©Jupiter Images, 2010]

Science and Engineering » Space Sciences

Is there life on Mars?

Find out if there is life on Mars and how scientists know.

Venus rotates in a retrograde. [©Jupiter Images, 2010]

Science and Engineering » Space Sciences

What is unique about the rotation of the planet Venus?

Find out what's unique about the rotation of the planet Venus.

Mercury and Venus are called inferior planets. [©Jupiter Images, 2010]

Science and Engineering » Space Sciences

Which planets are called inferior planets and which are superior planets?

Learn which planets are inferior planets and which ones are superior.

A 100-pound person on Earth weighs 16 pounds on the moon. [©Jupiter Images, 2010]

Science and Engineering » Space Sciences

What is the gravitational force on each of the planets, the moon and the sun relative to the earth?

Learn the gravitational force on each of the planets.

Saturn has the largest set of rings in the solar system. [©Jupiter Images, 2010]

Science and Engineering » Space Sciences

Which planets have rings?

Read about which planets have rings.

Mars is called the red planet. [©Jupiter Images, 2010]

Science and Engineering » Space Sciences

What are the colors of the planets?

Learn about the colors of the planets.

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