Astronomy Flashcards
(30 cards)
What is the unit discribed to measure very large distances?
Parsec
When a picture or pattern appears in the sky formed in the stars , what is it called?
Constellation
What is the definition of Nebula?
a patch of gas or dust in the sky.
What is the definition of a light-year?
distance light goes in one year.
What is the average distance between Earth and the Sun?
Astronomical Unit
What is Planetesimal?
Several bodies that come together to form a minature planet.
What are moon-sized discs that internally melt to make different interiors?
Protoplanetary
What is another name for a nuclear reaction?
Nuclear Fusion
What is a rocky surfaced planet like Earth called?
Terrestrial Planets
Jupiter, Saturn, Uranus, and Neptune are all. . .
Gas Giant Planets
What is a comet?
A comet is a rocky ball , with a nucleus made of ice and dust.
Whats a small rocky body that orbits the sun?
Asteriod
What is the name for the person who studies evolution and space-time relations?
Cosmologist
What is the definition of Angular Velocity?
Rate of change
Fill in the Blank:
“Mercury ____ the Sun”
Orbits
A long portion of time is a. . .
Period
What is it called to move in a circluar motion on an axis?
Revolve
The act of rotating on an axis is. . .
Rotation
What is it called when stars are aligned a certain way two days before?
Sidereal Day
What is the definition of Solar Day?
The time between transits of the sun in a particular place.
Whats the definition of a year?
The period starting at one time ending at that time.
