Planetary Composition, Distancefrom the Sun, and Melting Point
7.2 Members of Solar System divide by formation and the elements in 4 region 1. Inner planets 2. Asteroid belt 3. Outer planets 4. Oort’s cloud
1. Inner planets The terrestrial planets Between the Sun and Asteroid belt Mercury, Venus, Earth ,Mars The planets that are small and rocky, Metal Core.
2. asteroid belt Most asteroids lie between the orbits of Mars and Jupiter. An asteroid is a small, rocky body whose diameter can range from a few hundred kilometers to less than a kilometer. Example : Gaspra, Ceres, Pallas
3. Outer planets Giantplanets, The Jovian planets) The Giant planets, with huge gas , Hydrogen and Helium. Jupiter, Saturn, Uranus, and Neptune.
4. Oort’s cloud The Oort’s cloud are comets with long orbital periods appear to be distributed in all directions from the sun, forming a spherical shell around the solar system
Meteoroid A meteoroid is a small, solid particle that travels through space. A meteor is the luminous phenomenon observed when a meteoroid enters Earth’s atmosphere and burns up, popularly called a shooting star A meteorite( ) is any
Kuiper belt object Like the asteroids in the inner solar system Most Kuiper belt comets move in nearly circular orbits that lie roughly in the same plane as the planets Example Objects : Pluto , Eris
7.3 The Sun The Sun is informally designated as a yellow dwarf, based on spectral class, is G2 surface temperature of approximately 5778 K (5505 C) It has a diameter of about 1,392,684 km about 109 times that of Earth 30
The Sun device into 2 part 1. the Solar Interior. 2. Atmospheric Layers.
The Solar Interior :divide into 3 layer 1. Core : A temperature of Core close to 15.7 million kelvin. Energy is produced by nuclear fusion. 2. Radiation zone 3. Convection zone