| Term | Definition |
|---|---|
| Meteor | A streak of light in the sky produced by the burning of a meteoriod in earths atsmophrere . |
| Asteriod belt | Any of thousands of dense rocky objects in orbit around the sun between mars and jupitar. |
| comet | The surface of Mercury has numerous interesting features, including a variety of craters, ridges, and terrains ranging from heavily cratered to nearly crater free. These features, and their location across the known planet surface, helps us to understand |
| revolution | The surface of Mercury has numerous interesting features, including a variety of craters, ridges, and terrains ranging from heavily cratered to nearly crater free. These features, and their location across the known planet surface, helps us to understand |
| Rotation | the spinning motion of a planet on its axis. |
| outer planets | gas giant planets found outside of the asteroid belt. |
| inner planet | terrestrial (earth-like) planets that are dense solids located between the sun and the asteroid belt. |
| gravity | the attractive force between two objects. |
| axial tilt | the invisible axis that are tilted allowing for seasons to occur. |
| probe | a robotic spacecraft that leaves Earth’s orbit and explores space. |
| satillite | any object that revolves around another object in space. Can be artificial or natural like the |
| heliocaentric model | nicolous copernicus idea that the earth planets and stars |
| Geocentric | is a truly fascinating world. But as it is, there is much that people don’t know about it. Perhaps it is because Neptune is the most distant planet from our Sun, or because so few exploratory missions have ventured that far out into our Solar System. |
| Tides | the rise and fall of sea levels caused by the combined effects of gravitational forces exerted by the Moon. |
| GreenHouse effects | is the process by which radiation from a planet's atmosphere warms the planet's surface to a temperature above what it would be without an atmosphere. |
|
Iluminated |
to light up
The moon is illuminated by the sun. |
|
celestial objects |
Known collectively by astronomers as celestial bodies, astronomical objects, and astronomical bodies, they are the stuff that fills the empty space of the universe. |
| luner eclipse | occurs when the Earth is between the sun and moon. Sunlight is blocked by the Earth. |
| solar eclipse | . .occurs during the NEW MOON PHASE when the moon passes between the Sun and Earth, and the moon fully or partially blocks the Sun |
| autumn | the season between summer and winter known as fall in North America. |
| equinox | the time and date when the sun passes directly over the equator; the length of day and night are equal (12 hours each) |
| solstice | the time and date when the sun is at its greatest distance from the equator; length of day and night show greatest difference |
| orbit | revolve around
circle around go around travel around |
| diameter | a straight line passing from side to side through the center of a circle or sphere the measurement from one side of a circle/sphere to the other side as you pass directly through the center. The equator is the diameter of the Earth. |
| survival temputures | the highest and lowest temperatures that humans can stand without dying |
| astronomer | the study of celestial objects (stars, galaxies, planets, moons, asteroids, comets and nebulae) and all phenomena that originate outside the atmosphere of Earth |
