Astronomy Flashcards
What is Light year?
The distance traversed by light by light in one meansolar year.
What is Velocity Angular Velocity?
The velocity of a body rotating around a specific axis or the rate of change.
A solar day is?
Time between sunrise and sunset.
What is year?
A period of 365 or 366 days.
Nebula is?…..
A cloud of interstellar gas and dust.
What is Orbit?
The usual course of one’s life.
Nuclear Fusion……?
Is a process of small nuclei combined to make a larger one.
What is Astronomy?
The material universe beyond earth’s atmosphere.
What is period?
A round of time or series of years by which time is measured.
What is the definition of revolve?
To turn around or rotate, as on the axis.
What is Rotation?
The movement or path of earth.
What is the definition of Sidereal?
Determined by or form from the stars.
What is the definition of day?
The interval of light between to days or the time between sunrise and sunset.
What is a Astronomical Unit?
A distance between the earth and sun.
Define Parsec?
A unit of astronomical length equal to 3.26 light-years.
What is Constellation?
Any group of various stars.
Planetesimal is…..?
Small bodies of accereted of gas and dust thought to have orbited around the sun during the forming of our planets.
Protoplanetary is….?
The collection of matter in the process of condensation.
What is the definition of Terrestrial planets?
Any of the four planets Mercury,Venus,Earth or Mars that are nearest to the sun and have similar size and density.
Define Gas giant planets is?
One of the four planets in our solar system that are composed chiefly of hydrogen and helium.
What is a Comet?
A celestrial object that orbits the sun along an enlongated path.
An Asteroid is?….
Many small irregularly shaped rocky bodies that orbit the sun primarily in the asteroid belt.
A Cosmologist is?……
The scientific study of the origin,evolution, and structure of the universe.
