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Science Universe Vocab Rev

Across
A graph showing absolute magnitude plotted against the surface temp. for a group of stars
Our galaxy! spiral galaxy which holds our solar system
Large celestial body that is composed of gas
The process in which two or more low-mass atomic nuclei fuse to form another
Collection of large and small bodies that orbit our central star, the sun - The Sun and its family of orbiting planets, moons, and other objects.
The actual measurement of a star's brightness - how bright a star would be if located at a standard distance
Group of stars that make a pattern - A group of stars that form a pattern in the sky.
An explosive release of energy that can extend outward as far as the sun's outer atmosphere
The movement of matter that results from differences in density caused by variations in temp. process by which energy is transferred in gases and liquids, occurring when a warmer, less dense area of gas or liquid is pushed up by a cooler, more dense area of the gas or liquid
Distance light travels through space in one year -
Dark areas that form on the surface of the sun; A darker spot on the photosphere of the Sun. A sunspot appears dark because it is cooler than the surrounding area.
Down
Huges groups of relatively cool gases that extend outward from the photosphere thousands of kilometers into the outer atmosphere
Large collection of stars, star clusters, gas and dust that is held together by gravity - Millions or billions of stars held together in a group by their own gravity.
Brightness of a star
Theory that the universe began (moment in time) in a huge explosion 13-14 billion years ago by a dot no larger than an atom
The measure of a star's brightness as seen from earth
All space, energy and matter
Galaxies shaped like pinwheels
The transfer of energy that travels long distances in the form of electromagnetic waves
Force which two objects exert on each other - force of attraction have on each other due to mass and distance between them