General Vocab Flashcards
What is the astronomical unit?
the average distance between the Sun and Earth
What is light year?
distance light travels in one year
What is parsec?
a unit used to describe large distances
What is nebula?
light or dark particles or dust
What is constellation?
a group of stars in the sky
What is planetesimal?
small solid particles that make up the planets
What is protoplanetary?
a whirling mass of gas that rotates around a star
What is nuclear fusion?
when two or more atomic nuclei join together to form a nucleus
What is terrestrial planets?
a rocky planet that is made up of silicate rocks and meatals
What are gas giant planets?
a large planet is a large planet that is composed of rocks and other solid matters
Descride what a comet is.
an objejct in the sky made up of ice and dust
An asteroid is …
any small body of particles that revolve around the sun in orbits
Cosmologist is …
someone who studies the history and structure of the whole universe
Angular velocity is …
the rate of change of an angle in a object from some reference point
Explain orbit.
the curved path around a planet
