PPT-Earth is only one of the planets in our solar system. There are seven other planets that

Mars Venus Earth Jupiter Mercury Saturn Uranus Neptune Our Home Planet Earth our home planet is the third planet from the Sun and the fifth largest planet in the Solar System Earth is 150 million kilometres from the Sun. The milky way. (seen from Bryce Canyon, UT). The Solar System. ?. “A . system. is a set of . interacting. or interdependent. components . forming an integrated whole” (Wikipedia). The Solar System. Chapter 23. 23.1 The Solar System. 99.85%. of the mass of our solar system is in the Sun, planets make up the rest.. Gravity holds planets in orbit.. Overview of the Planets. . Terrestrial planets. How do we know the Earth goes around the Sun?. Recap/Announcements. Canvas assignment due today . Moon motions in the sky due . Campus observatory. Midterm 9/27. Appearance . and motions of objects in the sky:. By . Ben . Mercury. The distances of planets from each other and from the Sun are often measured in Astronomical Units, AU.  One AU is the average distance between the Earth and the Sun, 93 million miles.  Using this system of measurement, Mercury is 0.39 AU from the Sun.. Ninth Edition. Neil F. Comins • William J. Kaufmann III. CHAPTER 5. Formation of the Solar System. and Other Planetary Systems. A montage of the planets in our solar system presented in correct relative sizes. The orbits in the background are also drawn to scale.. The milky way. (seen from Bryce Canyon, UT). The Solar System. ?. “A . system. is a set of . interacting. or interdependent. components . forming an integrated whole” (Wikipedia). The Solar System. . . 5,880,000,000,000 . miles or . 5.88 trillion miles.. The Milky Way. The Greek philosopher Democritus (450–370 BC) proposed that the bright band on the night sky known as the Milky Way might consist of distant stars. Aristotle (384–322 BC), however, believed the Milky Way to be caused by "the ignition of the fiery exhalation of some stars which were large, numerous and close together" and that the "ignition takes place in the upper part of the atmosphere, in the region of the world which is continuous with the heavenly motions.“ The . The Solar System. Sun, planets, moons, comets, asteroids, meteoroids.. Sun at the center.. Eight planets, thousands of asteroids, and millions of comets and meteoroids orbit the sun.. Dozens of moons orbit the planets.. How are the geocentric and heliocentric models of the solar system different?. . Models of the Solar System. In a geocentric model, Earth is stationary while objects in the sky move around it.. . In a heliocentric model, Earth and the other planets revolve around the sun.. The Greek philosopher Democritus (450–370 BC) proposed that the bright band on the night sky known as the Milky Way might consist of distant stars. Aristotle (384–322 BC), however, believed the Milky Way to be caused by "the ignition of the fiery exhalation of some stars which were large, numerous and close together" and that the "ignition takes place in the upper part of the atmosphere, in the region of the world which is continuous with the heavenly motions.“ The . Neoplatonist. philosopher . Olympiodorus. the Younger (c. 495–570 AD) criticized this view, arguing that if the Milky Way were sublunary it should appear different at different times and places on the Earth, and that it should have parallax, which it does not. In his view, the Milky Way was celestial. This idea would be influential later in the Islamic world.. Ingredients?. Planets. Their Moons, Rings. Comets. Asteroids. . Meteoroids. . Kuiper Belt Objects. The Sun. A lot of nearly empty space. Solar System Perspective. Orbits of Planets. All orbit in same . 2015-2016. Earth’s movement is constant!. Earth’s orbit. Sun is at the center. Orbit: movement of an object around another. ex: Earth orbits the Sun.. Elliptical: oval shaped. Revolution: 1 full orbit of Earth around Sun. . The Solar System. Identify planets by observing their movement against background stars.. Explain that the solar system consists of many bodies held together by gravity.. Objectives. The solar system consists of the planets, their moons, and many other bodies orbiting the Sun..