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Our subscribers' grade-level estimate for this page: 4th - 5th
Table of Contents Enchanted Learning
All About Astronomy
Site Index
Our Solar System Stars Glossary Printables, Worksheets, and Activities
The Sun The Planets The Moon Asteroids Kuiper Belt Comets Meteors Astronomers

Astronomy Dictionary
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Click on an underlined word for more information on that subject.


ASTRONOMICAL UNIT

AUAn astronomical unit, or AU, is equal to the mean (average) distance from the Earth to the Sun, which is about 92,957,000 miles (149,600,000 km).

AU, Astronomical Unit
PlanetAverage Distance from the Sun
(measured in AU)
Mercury0.39
Venus0.723
Earth1.0
Mars1.524
Jupiter5.203
Saturn9.539
Uranus19.18
Neptune30.06
Pluto39.53

Astronomy Dictionary
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Click on an underlined word for more information on that subject.
If the astronomy term you are looking for is not in the dictionary, please e-mail us.




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