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Solar System & Stars
The Solar System and the Stars
Term | Definition |
---|---|
orbit | to revolve or go around an object. "The earth orbits the sun once in 365.25 days." |
rotate | to spin around "The earth rotates on its axis once every 24 hours." |
geocentric model | A model of the solar system that places the earth in the center. This is wrong. |
heliocentric model | A model of the solar system that places the sun in the center. this is true. |
sol | Another name for sun. |
core | the hottest part of the sun |
hydrogen | a gas in a star that burns up and turns into helium. |
luminous | The more LUMINOUS a star is, the brighter it glows. |
Betelgeuse | A red gas giant star in the constellation Orion. |
constellation | a group of stars that form recognizable patterns. Orion and Ursa Major or constellations. |
star | a burning ball of gas held together by gravity |
habitable zone | an area around a star that is the right temperature to have liquid water and support life |
light year | a distance that tells how far light can travel in space in one year |
solar flare | A burst of high energy radiation made by the sun that can travel to Earth and interfere with cell phone reception and satellite communications |
seasonal constellation | A constellation that only appears during certain months or seasons during the year |
Polaris | The North Star |
hemisphere | half a sphere. We live in the northern hemisphere. |
equator | an imaginary line around the center of Earth that separates the northern hemisphere and the southern hemisphere |