Download Our Solar System and more Schemes and Mind Maps Astronomy in PDF only on Docsity! Moon Obs #1 Due! Moon visible: early morning through afternoon 6 more due June 13th 15 total due June 25th Final Report Due June 28th Our Solar System Objectives • Overview of what is in our solar system • How was the solar system formed Planets-Physical Properties • Terrestrial planets have hard, rocky surfaces you could stand on • Jovian planets are made of mostly liquid and gas. What we see aren’t hard surfaces, but cloud formations in their atmospheres • Jovian planets are much larger then the terrestrials! Other Satellites (Moons) • All the other planets, except Mercury and Venus, have satellites (moons) • More than 140 satellites in our Solar System! • Earth has 1, Mars has 2, Jupiter has ~62, Saturn has ~43, Uranus has ~24, and Neptune has ~13 • All are very different from each other- not just copies of our own Moon. But they do all have solid surfaces (like terrestrial planets) Other Objects: Asteroids • Asteroids (minor planets) are found interior to Jupiter’s orbit • Small rocky objects (largest 900 km) • N~100,000’s Big Ones • Many more small ones • Most in the Asteroid Belt •Trojan Asteroids could be Broken up moons! Oort Cloud • Defines the outer boundary of our solar system and the gravitational dominance of the Sun! • These objects are the left over material from the formation of the solar system LT The solar system is a large, mostly empty space This tutorial will give you an idea of the size of things Sun Size • pg. 105 How did the Planets get to be this way? Courtesy of APOD Things that spin tend to flatten out in shape Demo Why Does Everything Rotate and Spin in the Same Direction? v smaller r v bigger r v:spin v: revolution Collapse Collapse The planets formed by the accretion of planetesimals and the accumulation of gases in the solar nebula Iron, Silicon, etc condenses • Kelvin Temperature scale: • T(k) = T(C) + 273.15 • Defined absolute zero is 0° • Absolute zero: temperature at which all atomic motion stops! • Celsius: • Defined as freezing and boiling of water is 0° and 100° • Fahrenheit: based off the freezing and boiling point of salt water??? Planetesimals Sweep Up! So what’s in the solar system? Defined by the sun, and anything orbiting around it: 1. Planets (8, no Pluto for you!) 2. Planetary moons 3. Asteroids 4. Comets (trans-Neptunian objects) 5. Other debris (dust, gas, charged particles, etc.) Which of the following correctly lists the various regions of our solar system in increasing distance from the Sun? A. Terrestrial planets, Jovian planets, asteroid belt, Oort cloud, Kuiper belt B. Terrestrial planets, asteroid belt, Jovian planets, Kuiper belt, Oort cloud C. Terrestrial planets, Kuiper belt, Jovian planets, asteroid belt, Oort cloud D. Terrestrial planets, Jovian planets, asteroid belt, Kuiper belt, Oort cloud For a planet-star system, the center of mass of the two is located A. closer to the planet. B. closer to the star. C. directly in between the two. D. at the center of the star. LT Temp and Formation of The Solar System • pg. 103
