Posted by **Anonymous** on Monday, August 29, 2011 at 6:15pm.

can anyone help me define astronimical units?

- SCIENCE!!!!!!!!!!!!!!111111 -
**Davis**, Monday, August 29, 2011 at 6:19pm
A unit of measurement equal to 149.6 million kilometers, the mean distance from the center of the earth to the center of the sun.

- SCIENCE!!!!!!!!!!!!!!111111 -
**bobpursley**, Monday, August 29, 2011 at 6:22pm
That is called an Earth radii.

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