Hello Guest, if you're reading this, it means you have not yet registered. Please take a moment to Click here to register and in a few simple steps, you will be able to enjoy all the many features of our fine community. Please note that lewd nicknames are prohibited (no numbers or letters at random) and introduce yourself in the welcome section for you to meet our community.


  • Amused
  • Angry
  • Annoyed
  • Awesome
  • Bemused
  • Cocky
  • Cool
  • Crazy
  • Crying
  • Depressed
  • Down
  • Drunk
  • Embarrased
  • Enraged
  • Friendly
  • Geeky
  • Godly
  • Happy
  • Hateful
  • Hungry
  • Innocent
  • Meh
  • Piratey
  • Poorly
  • Sad
  • Secret
  • Shy
  • Sneaky
  • Tired
  • Wtf
  • + Post New Thread
    Results 1 to 1 of 1

    Thread: New Day New picture: In a galaxy far, far away

    1. #1
      Super Moderator
      is Playing again
       
      I am:
      Awesome
       
      chillingblock's Avatar
      Join Date
      Feb 2011
      Location
      Very deep in hell
      Posts
      14,526
      Thanks
      24,151
      Thanked 45,653 Times in 9,624 Posts

      New Day New picture: In a galaxy far, far away



      Photographer: NASA, ESA, Hubble Legacy Archive; Processing & Copyright: Rogelio Bernal Andreo


      Pulsating RS Puppis, the brightest star in the image center, is some ten times more massive than our Sun and on average 15,000 times more luminous. In fact, RS Pup is a Cepheid variable star, a class of stars whose brightness is used to estimate distances to nearby galaxies as one of the first steps in establishing the cosmic distance scale. As RS Pup pulsates over a period of about 40 days, its regular changes in brightness are also seen along its surrounding nebula delayed in time, effectively a light echo. Using measurements of the time delay and angular size of the nebula, the known speed of light allows astronomers to geometrically determine the distance to RS Pup to be 6,500 light-years, with a remarkably small error of plus or minus 90 light-years. An impressive achievement for stellar astronomy, the echo-measured distance also more accurately establishes the true brightness of RS Pup, and by extension other Cepheid stars, improving the knowledge of distances to galaxies beyond the Milky Way.


    2. The Following 8 Users Say Thank You to chillingblock For This Useful Post:

      Buddyjh (05-17-2019), Cranker (05-17-2019), Crystal Dragon (05-18-2019), FreaknDavid (05-17-2019), jell691 (05-17-2019), perplexed (05-17-2019), SARGEQUANGTRI (05-17-2019), steveOtoo (05-17-2019)

    + Post New Thread

    Tags for this Thread

    Posting Permissions

    • You may not post new threads
    • You may not post replies
    • You may not post attachments
    • You may not edit your posts
    •  

    Important Site Information