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;
32 Cards in this Set
- Front
- Back
|
Geocentric model |
A superseded description of the universe with the Earth at the center |
|
|
Heliocentric model |
The planets revolve around a fixed sun |
|
|
Moon |
An astronomical body that orbits planet Earth, being Earth's only permanent natural satellite |
|
|
Nebula |
An interstellar cloud of dust, hydrogen, helium and other ionized gases |
|
|
Nebular hypothesis |
The theory that the solar and stellar systems were developed from a primeval nebula |
|
|
solar system |
The collection of eight planets and their moons in orbit around the sun, together with smaller bodies in the form of asteroids, meteoroids, and comets |
|
|
Day |
A period of twenty-four hours as a unit of time, reckoned from one midnight to the next, corresponding to a rotation of the earth on its axis |
|
|
Inner planets |
Mercury, Venus, Earth and Mars |
|
|
Terrestrial planets |
A planet that is composed primarily of silicate rocks or metals |
|
|
Year |
The time taken by a planet to make one revolution around the sun |
|
|
Galilean moons |
The four largest moons of Jupiter, Lo, Europa, Ganymede, and Callisto |
|
|
Gas giant |
A large planet with a deep and massive gaseous atmosphere; less dense than a terrestrial planet |
|
|
Great Red Spot |
A raging storm on Jupiter |
|
|
Outer planets |
Jupiter, Saturn, Uranus, Neptune |
|
|
Planetary rings |
The rings around planets that are made up of bits of ice and rock |
|
|
Asteroid |
A small, rocky object that orbits the sun |
|
|
Asteroid belt |
A ring of debris that separates the inner planets from the outer planets |
|
|
Comet |
A small body made of ice, rock, and cosmic dust that follows an elliptical orbit around the sun |
|
|
Dwarf planet |
A celestial body resembling a small planet but lacking certain technical criteria that are required for it to be classed as such |
|
|
Kuiper belt |
The flat region beyond Neptune’s orbit that contains leftover planetesimals and short-period comets |
|
|
Meteor |
A streak of light caused by a meteoroid burning up in Earth’s atmosphere |
|
|
Meteor shower |
A number of meteors that appear to radiate from one point in the sky at a particular date each year, due to the earth's regularly passing through a field of particles at that position in its orbit |
|
|
Meteoroid |
A relatively small, rocky body that travels through space |
|
|
Mercury |
Inner planet, smallest planet and the closest planet to the sun |
|
|
Venus |
Inner planet, has high surface temperature, crushing pressure, and poisonous atmosphere |
|
|
Earth |
Inner planet, the only planet capable of sustaining life |
|
|
Mars |
Inner planet, surface gravity is 37% of what you would find on Earth |
|
|
Jupiter |
Gas giant, largest planet in the solar system |
|
|
Saturn |
Gas giant, bit enough to hold over 760 Earth's |
|
|
Uranus |
Gas giant, coldest planet in the solar system |
|
|
Neptune |
Gas giant, The Dark Spot |
|
|
Pluto |
Dwarf planet and not considered a real planet by astrologers |
