astronomy Flashcards
what is an astronomical unit
The average distance between the earth and the sun.
what is a Light Year?
The distance light travels in a year
Is a parsec measured in long or short distances?
A unit for large distances
What is Nebula?
A fuzzy patch in the sky; cloud of interstellar gas and dust
What is a Planetesimal?
Small bodies of matter that is clumped together.
What is a constellation?
A group of stars in the sky that forms a pattern.
What is Protaplanetary?
Material formed in eark stages of solar system formation.
What is Nuclear Fusion?
The process where stars generate energy.
What are Terrestrial Planets?
Plants that have the same characteristics and are closest to the sun?
Gas Giant Planets
Planets that do not consist of rock and or solid material.
What is a Comet?
Mass that’s surrounded by dust and gas that forms a trail that streams away from the sun.
What is an Astroid?
any of the thousand small bodies tht revolves around the sun in it’s orbits.
What do Cosmologist study?
Philosophy dealing with the structure of the universe.
What is angular velocity?
The time rate of change of angular position of a rotating body.
What an orbit?
A curved path traced by electrons.
What’s a period?
A large amount of time.
What is revolve?
To move in a circular course.
What is a rotation?
A complete turn.
What is the meaning of a year?
The time any plane completes a revolution around the sun.
