array: A broad and organized group of objects. Sometimes they are instruments placed in a systematic fashion to collect information in a coordinated way. Other times, an array can refer to things that are laid out or displayed in a way that can make a broad range of related things, such as colors, visible at once. The term can even apply to a range of options or choices.
astronomy: The area of science that deals with celestial objects, space and the physical universe. People who work in this field are called astronomers.
astrophysics: An area of astronomy that deals with understanding the physical nature of stars and other objects in space. People who work in this field are known as astrophysicists.
Big Bang: The rapid expansion of dense matter and space-time that, according to current theory, marked the origin of the universe. It is supported by astronomers’ current understanding of the composition and structure of the universe.
black hole: A region of space having a gravitational field so intense that no matter or radiation (including light) can escape.
celestial: (in astronomy) Of or relating to the sky, or outer space.
cosmos: (adj. cosmic) A term that refers to the universe and everything within it.
exotic: An adjective to describe something that is highly unusual, strange or foreign (such as exotic plants).
field: An area of study, as in: Her field of research is biology..
force: Some outside influence that can change the motion of an object, hold objects close to one another, or produce motion or stress in a stationary object.
galaxy: A group of stars — and usually invisible, mysterious dark matter — all held together by gravity. Giant galaxies, such as the Milky Way, often have more than 100 billion stars. The dimmest galaxies may have just a few thousand. Some galaxies also have gas and dust from which they make new stars.
host: (v.) The act of providing a home or environment for something.
light-year: The distance light travels in one year, about 9.46…
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