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21 Cards in this Set
- Front
- Back
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Big Bang Theory
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A theory of how the universe was created. All matter and energy was contained, but 14 billion years ago, it went outward in all directions.
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Red Shift
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Evidence that universe is still expanding. The more things in space get farther away and the wave length is stretched out, they look red.
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Galaxy
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A collection of stars, dust and gas bound together by gravity.
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Nuclear Fusion
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The process by which nuclei of small atoms combine to make and release energy.
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Milky Way
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Galaxy containing our solar system.
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Solar System
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The sun and all of the planets and other bodies that travel around it.
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Light Year
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The distance that light travels in one year.
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Planetesimal
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A small body from which planet originated in the early stages of development of the solar system.
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Prominence
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A loop of relatively cool, incandescent gas that extends above the photosphere and above the sun's edge as seen from Earth.
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Solar Nebula
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A rotating cloud of gas and dust from which the sun and planets formed; also any nebula from which stars and exoplanets may form
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Solar Flare
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An explosive release of energy that comes from the sun and that interrupts communication on Earth
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Corona
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Outer part of Sun, can only be seen in Solar Eclipses
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Sunspot
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Cooler parts on the sun; occurs in cycles
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Supernova
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Explosion of a star, due to collapsing under gravity; star grows in size and gets brighter
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Photosphere
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Visible part of the sun
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Black Hole
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Made after the death of a star, when gravity is so strong light cannot escape
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Aurorae
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Charged solar particles that are being guided along the Earth's magnetic field
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Neutron Star
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An extremely dense, compact star composed primarily of neutrons, especially the collapsed core of a supernova
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Red Giant
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A star in an intermediate stage of evolution, characterized by a large volume, low surface temperature
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Main Sequence Star
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What our Sun is; normally yellow and bright
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White Dwarf
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A star that has undergone gravitational collapse and is in the final stage of a stars life
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