You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
Glossary of Terms<br />
Planet: a celestial body which is in orbit around the Sun, has sufficient<br />
mass to assume hydrostatic equilibrium (a nearly round<br />
shape), has “cleared the neighborhood” around its orbit, and is not a<br />
moon.<br />
Orbit: the curved path of a celestial object or spacecraft around a<br />
star, planet, or moon, especially a periodic elliptical revolution.<br />
Gravity: the force that attracts a body toward the center of the<br />
earth, or toward any other physical body having mass. For most<br />
purposes Newton’s laws of gravity apply, with minor modifications<br />
to take the general theory of relativity into account.<br />
AU (Astronomical Unit): For general reference, we can say that one<br />
astronomical unit (AU) represents the mean distance between the<br />
Earth and our sun. The AU is approximately 150 million kilometers or<br />
93 million miles.<br />
Farenheit: of or denoting a scale of temperature on which water<br />
freezes at 32° and boils at 212° under standard conditions.<br />
Diameter: a straight line passing from side to side through the center<br />
of a body or figure, especially a circle or sphere.<br />
Rotation: the action of rotating around an axis or center.
Change language