Space Travel
19, May, 2012

Space exploration began with the launch of Sputnik and Astrophysics was born as the application of physics to the phenomena observed by Astronomy, which etymologically means laws of the stars.

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Term Definition
Dynamical Parallax
A measure of the distance to a visual binary star based on estimates of the masses of the stars deduced from their spectra and the observed properties of their orbits around each other.