Understanding redshift surveys

  1. ....With Galaxy Explorer 2.0


    I'm doing some personal reaserch on Sloan Digital Sky Survey, and I was wondering if anyone here uses this software?

    If so, could you tell me what the center is?

    For details of the SDSS project check the websites:
    GalaxyExplorer: a 3D visualization tool: http://cas.sdss.org/dr4/en/help/download/

    thank you
  2. jcsd
  3. I use the radial search and photometric catalogues a bit. What do you need to know specifically?
  4. Sorry, should've uploaded that from the beginning. I zoomed out as far I could to give some perspective. Specifically, I just wanted get some perspective about the middle.


    Here is what the read-me says.

  5. SpaceTiger

    SpaceTiger 2,969
    Staff Emeritus
    Science Advisor
    Gold Member

    The center is us (the Milky Way). The pie slices are the parts of the universe that we can see with SDSS. A galaxy's radial distance from us is estimated from its redshift.
  6. Thank you, SpaceTiger and matt.o.
  7. Chronos

    Chronos 10,348
    Science Advisor
    Gold Member

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