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Solar System Formation
Transcript of Solar System Formation
2.Cloud of material rotates 4.Nebula begins to flatten into a rotating pancake Local regions begin to contract gravitationally Reaches the "Magic Temperature" 5.Cloud Grew Warmer 3.Shockwaves may have caused the cloud to contract, and matter was squeezed into less space. 6. Left over matter created planets and asteroids Mercury Venus Earth and, Mars. We go a little further... We make it to Jupiter, the first gas giant Asteroid belt Saturn Uranus Neptune And Pluto! Pluto is just a silly dwarf planet So that brings us to the out reaches of our Solar System... The Kuiper Belt! And even further, the Oort Cloud Solar System Oort Cloud I know. It's a lot to take in
But I hope this presentaion was
able to give you, Inner Planets Small, Rocky, Iron Cores Outer Planets There have been different ideas about how The Solar System formed... Greek scientists thought the earth was at the center.
All other planets, moon an sun orbit the earth.
In ancient times, before telescopes.
People could only see 6 planets.
The geocentric model was believed until the 1500s. Galileo used the new technology of telescopes
He observed : 1) Orbit a star
2) Have enough mass to create its own gravity
3) Have a round shape
4) Have cleared its orbit (Pluto doesn’t!) Kepler discovered that:
The shapes of the planets’ orbits are not circular, but ovals (ellipses) In the early 1600s, German mathematician Johannes Kepler began studying the orbits of the planets. Motions of the Planets The Geocentric Model The Heliocentric Model Galileo Galilei Jupiter had moons that orbited it
This disproved the idea that everything orbited Earth Venus goes through phases like the Moon
It had to be orbiting the Sun Modern view - Sun, 8 planets, many small objects, and a huge volume of space A long time ago in a galaxy not so far away... All other objects in the solar system revolve around the Sun One guy changed the perception... The Modern View of the Solar system Planets closer to the Sun orbit at a higher speed than planets farther away from the Sun ...haha, just kidding In 2006 the IAU issued the 1st guidelines on what makes a “planet”. They decided a planet must: So now Pluto, Ceres (a large asteroid) and some other Objects past Pluto are Dwarf Planets, Or "Kiper Belt Objects" (KBO's) Or does it? But, how did we get to this view? Triggered Fusion Reaction to Create the Sun Large, made of Gas DO NOW: What is one thing you are excited about learning about in the solar system chapter? HOMEWORK: 12.2 KTSAQ #1-5 We now know that the solar system is made up of eight Planets that orbit around the sun. The Sun's gravity holds the planets and other objects in the solar system in their orbits. http://www.teachersdomain.org/asset/hew06_vid_planetdefine/