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Universe Formation

List of vocab words of the universe formation

QuestionAnswer
Define Asteroid rocky remnantof the early solar system found mostly in the asteroid belt.
Define Asteroid Impact An impact event is the collision of a large asteroid with the earth or another planet.
Define Galaxy A system of millions/billions of stars together with gas and dust held together by a gravitational attraction.
Define hydrogen A colorless, highly flammable, odorless gas.
Define Mass a measure of the resistance an object has to change in its velocity.
Define Milky Way Our galaxy, on Orion's Arm
Define Orbit The curved path a celestial object around a star, planet, or moon.
Define Planet A celestial body moving in an elliptical orbit around a star.
Define revolution the curved path of a celestial ovject around the sun.
Define rotataion the action of rotating around and axis or center.
Define Solar System The collectionn of planets and their moons in orbit around a sun together with smaller bodies like asteroids, meteroids, and comets.
Define Sun A medium sized star.
Define Universe All exting matter and space considered as a whole.
What is the age of the universe? 13.7 billions years old.
Define Astronomical Distance Distance between Earth and the Sun.
What is the Big Bang Theory? The theory that the universe began as a point and has been expanding since.
Define Cosmic Microwave Background. The cooled remnant of the hot big band that fills the entire universe and can be observed today.
Define Expansion of the universe The observation in physical cosmology that the velocity at which various galaxies are receding from the Earth.
What evidence is there of the Big Bang Theory? Expansion of the Universe and Cosmic Microwave Background.
Define Ga Billiono of Years ago.
Define light year A measurement, not time. The distance light travels in one year.
Define Nebula The formation of a star that begins with a cloud of interstellar gas and dust that collapses on its self
Define Nova Star stage of Explosion
Define Nuclear fusion H->He
What is the speed of light? 300,000 km/sec 186,000 miles/sec
How does a star form? When dense parts of molecular clouds collapse into a ball of plasma to form a star.
Define Protostar A disk shape with a hot condensed object in the center.
Define Astronomy The branch of science that deals with celestial objects, space, and the physcial universe as a whole.
Define cosmology the study of the universe, it's nature, origin, and evolution.
Define Celestial Relating to the sky, or outer space as observed in astronomy.
Created by: ni0l
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