Term | Definition |
Universe | A whole body of things that exist |
Atmosphere | The mass of gasses surrounding a heavenly body (planet) |
Star | A natural body visible in the sky, especially at night, that gives off light |
Satellite | A celestial body orbiting around the Earth or another planet |
Comets | Bright, heavenly bodies that develop a cloudy tail as they move closer to the sun |
Asteroids | One of thousands of small planets between Mercury and Jupiter |
Meteoroids | Small bodies of matter in the solar system seen when falling into our atmosphere |
Astronomy | The science of heavenly bodies and their sizes/motions/makeups |
Dwarf planet | An object the size of a planet but is NOT a planet, moon or satellite |
Solar system | A star with a group of heavenly bodies that revolve around it |
Rotation | To turn on an axis or center |
Revolution | To move in an orbit((One Earth revolution takes 365.25 days) |
Elliptical orbit | The orbit path of some planets that is oval shaped like a flattened circle |
Orbit | The path taken by one body circling around another body |
Axis | A straight line on which a body(ex. planet) rotates |
Gravity | The force of attraction between particles. It gets stronger as mass increases |
Seasons | Four quarters into which the year is commonly divided |
Tilt | A sloping surface or slant. The Earth is tilted 23.5 degrees |