Solar System Science Olympiad

10 terms by Sweldensj 

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Tektite

A small, glassy material formed by impact of large body, usually a meteor or asteroid commonly found at the sixties of meteor craters.

Aphelion

The point in the orbit of a planet or other celestial body where it is farthest from the Sun

Faculae

Bright patches that are visible on the Sun's surface, or photosphere

Zenith

A point directly overhead from an observer

Ablation

A process by where the atmosphere melts away and removes the surface material of an incoming meteorite

Eccentricity

The measure of how an object's orbit differs from a perfect circle

Penumbra

The area of partial illumination surrounding the darkest part of a shadow caused by an eclipse

Sunspots

Areas of the Sun's surface that are cooler than surrounding areas. They usually appear black on visible light photographs of the sun and are usually associated disturbances in the Sun's electromagnetic field

Plasma

A form if ionized gas on which the temperature is too high for atoms to exist in their natural state, composed of free electrons and free atomic nuclei

Heliopause

The point in space at which the solar wind meets the interstellar medium or solar wind from other stars

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