Solar System

• Asteroids are small, rocky objects that orbit the Sun.
• The asteroid belt is located between Mars and Jupiter.
• When was the Solar System formed?

  4.6b years ago
• What was the only theory that was acceptable about the solar systems origins?

  Nebular theory
• The 8 planets in our solar system are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune
• Mercury, Venus, Earth, and Mars, are known as the terrestrial planets composed of rock and metal
• Jupiter, Saturn, Uranus, and Neptune, are known as the Jovian planets, formed by large amounts of ice
• When Massive stars die, they tend to explode in supernovae, leaving behind black holes or neutron stars.
• Larger than asteroids and comets, but smaller than planets and some moons?

  Dwarf Planet
• Comets are composed of ice and dust. As these approach the sun, the heat causes it to evaporate. Resulting in a long trail of glowing vapor called tail
• Chunks of rock and metal. It represents debris from the nebular cloud which never formed a planet?


  Asteroid
• Natural satellites that orbit around larger objects?

  Moons
• The smallest of the eight planets and is only two-fifths the size of Earth. It has the fastest revolution of all the planets.
• Venus is covered in a thick veil of volcanic fumes, 96% of which is carbon dioxide.
• Venus is also called as Morning star, Evening star, or Earths twin.
• Two highland regions similar to continentsdefinetheVenus surface: Ishtar Terra and AphroditeTerra.
• Uranus has a retrograde rotation, rotating from east to west which is the opposite of most of the planets.
• M ars has two small satellites. The farther and smaller moon is Deimos, while the closer and the slightly larger moon is Phobos.
• Even at night, Mars twinkles bright red against the whites of other celestial bodies, that’s why it is sometimes called the “Red Planet
• The four largest moons are named as “Galilean satellites” consisting of Europa, Callisto, Ganymede, and Io.
• Compositionally, Earth’s layers are divided into three – the crust, the mantle, and the core.