FAINT EARLY SUN PARADOX - Earth 2 Thursday February 18th...

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

Earth 2 Thursday, February 18th, 1999 Announcements: Lecture notes: Our planet has been stable for billions of years. When broken down into different time frames, we can see how different the earth used to be. Tens of thousands of years ago the earth's system was very sensitive to something. The earth was affected by very abrupt changes. Many lessons can be learned from looking at the past. FAINT EARLY SUN PARADOX This implies that the universe was formed about 15 million years ago. Dust, gravity, etc. forms the planets & stars...Hydrogen & Water Vapor escape forming crust. This occurred fairly early on because of bombing, heating, and segregation. This occurred early in the 4.6 billion years because we have an atmosphere and an ocean. SOLAR EVOLUTION When the sun's temperature < 50 C...Hydrogen fuses --> Helium. This fusion process creates energy. 4H --> 1 Helium + Energy. This creates a star with fewer particles and more mass.
Image of page 1

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

Image of page 2
This is the end of the preview. Sign up to access the rest of the document.
  • Spring '99
  • Eigenbrode
  • Runaway ice house, FAINT EARLY SUN, EARLY SUN PARADOX

{[ 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