celestial visitors have captured the imagination of ancient civilizations. They have thought of bad omens or signs of great change or challenge such ad ishering disasters or wars.
Comets - made up of ice, rock, and cosmic dust. it follows an elliptical path
comets are found in Kuiper belt and Oort cloud
SHORT-TERM COMET - orbital period of less than 200 years. found in KUIPER BELT
LONG-TERM COMET - Orbital period of more than 200 years, found in the OORT CLOUD
PARTS OF A COMET -
Nucleus
Coma
Ion tail
Dust tail
Nucleus - composed of ice, rock and metal; frozen
Ion tail - composed of charged gases
Dust tail - composed of very small dust particles
coma - composed of water vapor, carbon dioxide, dust and ammonia
Meteors -
meteoroid
Meteors
Meteorite
meteors - composed of Iron and nickel
meteoroids - any Natural solid object moving in space
meteors - enter the earths atmosphere, usually found in mesosphere
meteorite - landed and found in earths surface
Meteor colors -
RED - Atmospheric nitrogen and oxygen
ORANGE YELLOW - sodium
YELLOW - iron
BLUE GREEN - magnesium
VIOLET - calcium
ASTEROIDS - some are called planetoids, solid, rocky-metallic, irregularly-shaped objects
ASTEROIDS - found beyond the asteroid belt, found along the Jupiters orbit
asteroids and its compositions -
Carbonaceous (dark C) - Hydrogen
Silicaceous (bright S) - Silicates of Iron and Magnesium