Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
19 Cards in this Set
- Front
- Back
|
Orbit
|
curved path of one object around another object in space
|
|
|
Nebula
|
cloud of gas and dust in space
|
|
|
solar system
|
The Sun and all objects that orbit it.
|
|
|
Ellipse
|
flattened circle, or oval
|
|
|
perihelion
|
point at which a planet is closest to the Sun
|
|
|
Aphelion
|
point at which a planet is farthest from the sun
|
|
|
Mare
|
broad, flat plain on the Moon's surface
|
|
|
crater
|
Round hole on the Moon's surface.
|
|
|
Satellite
|
natural or artificial object orbiting another body in space
|
|
|
Rift
|
valley caused by a crack in the crust of a planet
|
|
|
Asteroid
|
large chunk of rock or metal that orbits the Sun
|
|
|
Meteoroid
|
small piece of rock or metal that travels through space
|
|
|
Meteorite
|
piece of rock or metal that falls on a planet or moon's surface
|
|
|
meteor
|
Rock or metal that enters Earth's atmosphere.
|
|
|
Dwarf planets
|
small, planetlike objects that orbit the Sun and share their orbits with similar objects
|
|
|
Comet
|
lump of ice, frozen gas, and dust that orbits the sun
|
|
|
Tail
|
long, ribbonlike trail of comet dust and gas
|
|
|
Coma
|
gas cloud that surrounds the nucleus of a comet
|
|
|
nucleus
|
Head or solid part of a comet.
|
