Astronmony Flashcards
What is a Astronomical Unit?
A unit of measurement, the distance from the center of the earth to the sun.
What is Light Year?
The distance that light travels in one year.
What is a Persec?
A unit of distance used in astronomy.
What is a Nebula?
A cloud of gas and dust in outer space.
What is Constellation?
A group of stars forming a pattern that is traditionally named after its apparent form or identified with a mythological figure.
What is Plateteismal?
A minute planet; a body that could come together with many others under gravitation to form a planet.
What is Protoplanetary?
The collection of matter, in the process of condensation, from which a planet is formed.
What is Nuclear Fusion?
A nuclear reaction in which atomic nuclei of low atomic number fuse to form a heavier nucleus with the release of energy.
What is Terrestrial Planets?
A planet having a compact rocky surface.
What is Gas Giant Planets?
A type of planet characterized by being composed almost entirely of gas.
What is a Comet?
A small icy part from the solar system, and when its close to the sun it gets fuzzy.
What is Asteroid?
A small rocky body orbiting the sun.
What is Cosmologist?
An astronomer who studies the evolution and space-time relations of the universe.
What is Angular Velocity?
The rate of change of angular position of a rotating body.
What is Orbit?
To move around.
What is Period?
A length or portion of time.
What is Revolve?
Move in a circle on a central axis.
What is Rotation?
The action of rotating around an axis or center.
What is a Sidereal Day?
Two sides of the sun. revolving over the meridian.
