Our Solar System Planets – Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, & Neptune. Dwarf Planets – Pluto, Ceres, Haumea, Makemake, Eris.
Asteroids Asteroid Belt is located between Jupiter and Mars. If an asteroid falls to Earth is called a Meteor. If it does not burn up completely before it falls to the ground it is a Meteorite.
Kuiper Belt The Kuiper (sounds like viper) is made up of icy circular pieces that have a different composition than asteroids or comets.
Oort Cloud The Oort Cloud contains a trillion comets. They can arrive from neighboring solar systems. A foreign comet called Sedna was discovered in 2003.
Heliosphere Solar winds and winds from the Sun mix with winds from other stars. This is known as the Heliosphere, or the border of our solar system and a neighboring one.
Our Star… • the Sun
T/F Questions • 1. The Sun gives heat and light to the Earth. • 2. Our Sun is different than a star. • 3. The Sun is the center of our Solar System. • 4. The Sun is a burning ball of gas. • 5. Our Sun is very large compared to other stars in the universe.
Answers • The Sun gives heat and light to the Earth. True • 2. Our Sun is different than a star. False • 3. The Sun is the center of our Solar System. True • 4. The Sun is a burning ball of gas. False • 5. Our Sun is very large compared to other stars in the universe. False
Location The Sun is approx. 93 million miles from Earth. The distance of the Sun to the Earth is an Astronomical Unit (AU). The Sun is located in the Orion arm of the Milky Way Galaxy.
Comparative Size The sun is 1,390,000 km in diameter. The diameter of the Sun is over 100 times the diameter of the Earth. The Sun is a medium sized star that is halfway through its lifecycle. The Sun appears larger because of how close it is to Earth. The mass of the Sun in about 2 x 10 to the power of 30 kg.
Revolution A complete Revolution, or circle, happens once about 250 million years.
Rotation The Sun Rotates on its axis. A spot on the equator takes 25 days. The north and south poles takes 31 days. The rotation of the Sun and the Iron in its core cause it to have a strong magnetic field that affects objects within 3 million miles of it.
Layers Core Radiation Zone Convection Zone Photosphere Chromosphere Corona Prominence
Composition The Sun consists about 70% hydrogen, 28% helium and 2% of metals, such as Iron.
Temperature The Temperature of the surface of the Sun is about 5,000 degrees C. The Core is about 15,600,000 degrees C
Nuclear Fusion The Sun is 4.5 billion years old. Has about 5 billion years left before the hydrogen runs out. Nuclear Fusion is when 2 protons combine with 2 neutrons. The energy is released through its surface and through space.