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7 Cards in this Set

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When did Galileo build his first telescope?
1609.
Who was the first person to telescope the sky?
Galileo.
Inertia:
The tendency of an object to resist a change in its motion.
Mass:
The quantifiable property of an object that is a measure of its inertia. It is an intrinsic property of an object and independent of location.
Precession:
The conical shifting of the axis of a rotating object, also known as wobbling.
When Galileo observed Venus at its greatest size, Venus' phase was
Crescent.
A planet orbits a star in an approximately circular orbit.
The planet revolves around the center of the star.