Flashcards in The Universe Deck (13):
What is a star?
a fixed luminous point in the night sky that is a large, remote incandescent body like the sun.
What is a light year?
The distance light travels in one year
What is a red giant?
A large reddish star late in its life cycle
What is a white dwarf?
A small,hot, dim star that is the leftover center of an old star
What is a supernova?
A gigantic explosion in which a massive star collapses and throws its outer layers into space, plural supernovae
What is a black Hole?
An object so massive and dense that not even light can escape its gravity
What is a cluster?
A group of star galaxies bound by gravity
What is interstellar matter?
The gas and dust located between the stars in the galaxy.
What is a quasar?
Radio sources,very luminous object that produces energy at a high rate that are thought to be the most distant objects in the universe.
What is a universe?
The sum of all space,matter, and energy that exists, that have existed in the past, and that will exist in the future.
What is a red shift?
An apparent shift towards longer wavelengths of light cause when an a luminous object moves away from the observer.
What is a blue shift?
An apparent shift towards shorter wavelengths of light caused when a luminous object moves towards the observer.