Astronomy Flashcards
What is an Astronomical Unit?
Is the average distance between the Earth and the Sun.
What is a Light-Year?
Distance of light travels in one year.
What is a Parsec?
Describing large distances.
What is a Nebula?
“fuzzy” patch on the sky.
What is a Constellation?
A grouping of stars that form a shape.
What is a Planetesimal?
Small bodies then into big protoplanets.
What is a Protoplanetary Body?
Clump of material, formed in the early solar system.
What is a Nuclear Fusion?
A nuclear process.
What are Terrestrial Planets?
Planets that look similar to the Earth, such as Venus.
What are Gas Giant Planets?
Large planets that are made entirely of gas.
What is an Angular Velocity?
Change of angular position of a rotating body.
What is a Comet?
A celestial body moving about the sun.
What is an orbit?
The curved path around the sun.
What is an Asteroid?
Any numerous of bodies that move between Jupiter & Mars.
What is a Cosmologist?
An astronaut who studies evolution and structure of the universe.
What kind of unit is a Year?
A period of the same length in other calenders.
What does it mean to Revolve?
To move in a circular orbit.
What is a Rotation?
Turning around on its axis.
What does it mean to Sidereal?
Pertaining to the stars.
What kind of unit is a Day?
Time between sunrise and sunset.
What kind of unit is a Solar Day?
Time equal to 24 hrs.
What kind of unit is a Period?
Portion of time.
