{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

lecture 3 ppt - Solar System 1 Present theory suggests that...

Info icon This preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
1 Solar System 1. Present theory suggests that the universe is 15- 20 billion years old 2. Our solar system formed from rotating clouds of gas and dust 3. The sun is an average star 4. Composition of the planets depends on their closeness to the sun with closer planets more dense than those farther away. 5. Earth is third closest fifth smallest has a liquid center and crust on the outside. Factoids about light and the universe Speed of light 299,792 kmps (186,282 mps) Universe is 12 billion light-years across Milky Way Galaxy 100,000 light years across Our Solar System 11 light-hours across Moon is 1.28 light-seconds away Bottom line – light is fast and the universe is really big Our Solar System Figure 2.1 In August 2006 Pluto, was demoted to a s a "dwarf planet". If waas feared that the demotion was likely to upset the public, who have become accustomed to a particular view of the Solar System. Another planet? On August 5, 2005 astronomers announced that they discovered a chunk of rock and ice that may be the 10 th planet in our solar system The object, currently called 2003 UB313, orbits the sun and
Image of page 1

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern