OBJECTS IN THE SKYLO: I will describe various objects in the sky

SUN: energy(heat & light) from Sun produces Earth's weather

Core: center of Sun, nuclear fusion reactions change hydrogen to heliumreactions release energy

core temperature 27 million degrees Fenergy moves from the core to the surfacesurface temperature 4 million degrees Fenergy travels through space as electromagnetic waves of light and heatEarth is 93 million miles from Sun, receives only tiny amount of Sun's energyharmful rays are filtered by atmosphere, ozone and Earth's surfaceSun is much larger than Earth 840,000 miles diameterSun is medium sized star

SUN (CONT.)

ASTEROIDS: mountains of rock and metal that are found between Mars and Jupiter (asteroid belt)

On the first day of January 1801, Giuseppe Piazzi discovered an object which he first thought was a new comet. But after its orbit was better determined it was clear that it was not a comet but more like a small planet. Piazzi named it Ceres, after the Sicilian goddess of grain. Three other small bodies were discovered in the next few years (Pallas, Vesta, and Juno). By the end of the 19th century there were several hundred.

COMETS: chunks of rock and ice that orbit the Sun in long, oval pathsas comets near the Sun, part of the comet begins to melt and turn to vapor which causes a long, visible gas tail streaming behind the cometHalley's Comet orbits the Earth every 76 years. 

Last seen in 1986, will return in 2061

METEOROIDS: smaller pieces of rock and dust that fly around the solar system, trail and dust of comets

METEORS (SHOOTING STAR): meteoroids that pass through Earth's atmosphere; most burn up quickly before hitting Earth's surface

METEORITE: if a meteor hits Earth's surface, surviving chunk of rock is called meteorite

STARS: great balls of gas that burn at tremendous temperatures

undergo nuclear fusion reaction changing hydrogen to heliumSun is nearest starvery bright but seem dim because of their great distanceso far away that their distances are measured in light-years

the distance it takes light to travel in one year.(moving at 186,000 mps)

CONSTELLATIONSgroup of stars that appear to form a picture in the sky

Orion