3.1 Astro 1 Section 1 Professor Brandt

3.1 Astro 1 Section 1 Professor Brandt - Astro 1 Section 1...

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

Astro 1 Section 1 Professor Brandt Monday March 1st 1999 Announcements: Lecture notes: Class 22 So far we have talked about our Galaxy and other galaxies out in space. But we have not talked about overall distribution of galaxies in space. Are they just randomly scattered about or is there some organization? larger sale - need megaparsec 1 Mpc = 1x10 6 pc. Tend to be clustered together in collections ranging from a few to thousands. Interesting and raises important questions. How did galaxies get that way? are the galaxy populations of small clusters the same as those of large clusters? What holds galaxy clusters together? Rich galaxy clusters - contain more than 1000 galaxies in volume that is about 3 Mpc in diameter. - mostly contain elliptical galaxies - often have a giant elliptical in center. Examples coma cluster - 1000 galaxies about 100 Mpc away Virgo Cluster - 2500 galaxies - giant elliptical in center = M87 18 Mpc away - gravity holds together - galaxies not stationary.
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.

{[ 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