How do we measure planets without having been to them?

Subject: How do we measure planets without having been to them?

Date: Thu Jun 1 11:52:35 2000
Posted by Caitlin
Grade level: 4-6 School: Grace Miller Elementary
City: Bealeton State/Province: VA Country: USA
Area of science: Astronomy
ID: 959874755.As

Message:


Find a answer to a question you have always wondered about and never 
learned about.

Re: How do we measure planets without having been to them?

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