Astonomy Flashcards
(24 cards)
A nuclear reaction.
Nuclear fusion
Protoplanets are moon-sized or larger planetary embryos.
protoplanetary
Gas and dust that have orbited the Sun during the formation of the planets.
or
A small planet.
Planetesimal
A group of stars that make a pattern.
Or
A group of stars.
constellation
Light or darkcloud.
nebula
A parsec Can be 3.26 a light year.
Parsc
Distance of light that travels in one year
Light Year
Is the distance between the sun and earth.
Astronmical unit
A planet having a compact rocky surface like the Earth’s
Terrestrail planets
A large, massive, low-density planet composed primarily of hydrogen, helium, methane, and ammonia in either gaseous or liquid state.
Gas Giant
A celestial object that orbits the Sun along an elongated path.
Coment
Any of numerous small, often irregularly shaped rocky bodies that orbit the Sun primarily in the asteroid belt , a region between the orbits of Mars and Jupiter.
Asteroid
The scientific study of the origin, evolution, and structure of the universe.
Cosmologist
What do they call a angle orbit.
angular
The speed and direction of motion of a moving body.
Velocity
The path followed by a celestial body or artificial satellite as it revolves around another body due to the force of gravity.
Orbit
A division of geologic time that is longer than an epoch and shorter than an era.
period
To turn about an axis
revolve
The motion of an object around an internal axis.
rotation
Relating to the stars or constellations.
sidereal
A period of twenty-four hours as a unit of time, corresponding to a rotation of the earth on its axis.
day
The time between successive meridian transits of the sun at a particular place
solar day
The period of 365 days (or 366 days in leap years)
year
