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Terms in this set (27)
The distance that light can travel in one year (9,460,730,472,580.8 km).
The amount of matter in an object (measured in kg).
Everything that exists, including all stars, galaxies, matter, energy, space and time).
A huge group of single stars, star systems, star clusters, dust, and gas bound together by gravity.
A massive object in space of hot gases (mostly hydrogen and helium) that gives off all of the forms of EMR created by nuclear fusion reactions in its core.
Cosmic Microwave Background Radiation
(CMBR) The cooled remaining heat of the hot big bang that fills the entire universe and can be observed today with a temperature of about 2.725 kelvin.
A branch of astronomy that studies the origin and evolution and structure of the universe.
A star with the celestial bodies (such as planets, moons, asteroids and comets) that revolve around it in its gravitational field.
An extremely large cloud of gas (mainly hydrogen) and dust in interstellar space.
An object in space that revolves around a star and has enough gravity to pull its self into a ball shape.
A device that uses lenses to magnify light images from far away objects.
A device that uses a large dish to collect and magnify radio waves from far away objects.
The initial explosion that resulted in the formation and expansion of the universe 13.7 billion years ago.
A very strong set of evidence that explains and unifies a range of observations and when tested always works.
An educated guess that explains certain facts or observations that requires further investigation.
A process where stars are created in nebula, burn their hydrogen in nuclear fusion, go through changes in size and energy, before finishing their life as a black dwarf or supernova and become a neutron star or black hole. Supernova sends parts of the star into neighboring gas clouds for the process to start again.
A star that ejects some of its material in the form of a gas cloud and become brighter in the process.
A change in the apparent frequency of a wave as the observer and the source of waves move either toward or away from each other.
The force of attraction between all masses in the universe.
A nuclear reaction in which nuclei combine to form more massive nuclei with the release of energy.
EMR with longer wavelength than gamma rays but shorter than UV rays; used in medicine, industry, and to take picture of the inside of solid objects.
The closest star to the Earth.
The remains of an extremely massive star after a supernova that is so dense that nothing, not even light, can escape its gravity field.
A decrease in the observed wavelength of radiation emitted by an approaching object in space.
An increase in the observed wavelength of radiation emitted by an object moving away from us in space.
EMR waves with the shortest wavelengths and highest frequencies. Very high energy: only released by nuclear reactions.
A small and very dense object in space that is the result of a very high-mass star collapsing in on its self after a supernova.
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