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ES - Astronomy #2

TermDefinition
The Big Bang Theory Most widely accepted theory for how the universe formed.
Solar Nebula Theory The most widely accepted theory on how solar system and stars form.
Solar Nebula Huge, vast clouds of ice, gas and dust.
The Hertzsprung - Russell (H-R) Diagram Shows the relationship between absolute magnitude (brightness) in relation to their surface temperatures
Galaxy A collection of billions of stars
Black Hole The end of the life cycle of some supergiant stars
Light Year The distance light travels in one year; most common unit of measurement used in Astronomy
Asteroids Pieces of broken planet and are found in the Asteroid Belt
Comets Orbit the sun and are made of up frozen gases, whose tails point away from the sun due to solar wind
Meteoroids Left over pieces of a comet's tail floating in space
Meteor When meteoroids enter the Earth's atmosphere where they burn up
Meteorite When a meteor strikes Earth
Solstice When the Sun is at its most northern point (over the Tropic of Cancer) or at its most southern point (over the Tropic of Cancer)
Impact Theory States that the Moon formed when a large object struck the Earth and material from inside the Earth was ejected out in space and this material formed the Moon
Waning Phases When the left side of the moon is visible (lit)
Waxing Phaes When the right side of the mooon is visible (lit)
Solar Eclipse Occurs when the Moon's blocks the sunlight and a shadow falls on the Earth
Lunar Eclipse Occurs when the Earth's blocks the sunlight and a shadow falls on the Moon
Fusion Combining two hydrogens to make helium; how the sun produces heat
Created by: aaron_nikk
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