{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Notes for Final

Notes for Final - 1/m^2.5 gives answer in solar lifetimes...

Info icon This preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
Notes Omega is density Omega (m) is density of matter & omega (lamda) is dark energy Plot : X axis is density of matter y axis is density of dark energy Anything with the sum of the two is 1, is a flat world. Matter # is actually .23 so Dark energy would be about .77 Questions: What if the sum isn’t one? How do we know its equal to one? From measuring distances of supernovae, we know it used to expand slower so it’s speeding up. Vertical is how much matter in universe. You are comparing size of speckles to get 1 Lifetime = star about to turn off main sequence gives lifetime
Image of page 1
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: 1/m^2.5 gives answer in solar lifetimes If you know mass of a star on main sequence, you can get its luminosity. Lifetime of universe Geometry of universe (the confusing graph. Ω = ΩA + Ωm = 1) which tells us universe is flat. Lifetime of star clusters (age is same as the star just now dying off main sequence) F = L / 4pid^2 (this is how we get distance) this could be related to D in hubble’s constant which could then go into age of the universe which could conflict with the age of a star cluster See how formulas relate...
View Full 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