S: ALPHABET BOOK
1: By JD
2: is for Astronomy unit | A planets average distance from the sun.
3: is for BLACK HOLE | A small hole in the sky that even light cannot escape
4: is for Cosmology | The study of the world
5: is for Declination
6: Eclipse | your body is blocking the tv like an eclipse
7: FireBall | the sun is hot like a fireball.
8: Gravity | gravity is what holds me up
9: Heliocentric | the sun is the center
10: Igneous rock | Rock that was once molten | Jovian planet | any of the outer fr planets
11: keV | one thousand electron volts.
12: Light year | the distanced light travels in a year
13: milky way | Our galaxy
14: Nebula | a large interstellar of gas and dust !
15: Orbit | the path of an object that is moving around a second object or point.
16: Patera: shallow crater; scallapeed, complex edge | Quadrature | A point in the orbit of a superior where it appears at right angles of the sun
17: Radiant | A point in the sky where meteors originate
18: Satellite | A natural or artificial body in orbit a planet
19: Tectonic | The deformation forces acting on a planets crust.
20: Umbra | The are of total darkness in the shadow caused by an eillpse.
21: Vallis | White light | Visible light that include all colors | Widespread lawlands
22: X-ray star | A bright celestial object that gives off x rays as a major portion of its radiation
23: Zenith | Yellow Dwarf | A yellow dwraf is a small, main sequence star like the sun