Amateur Scientifics

Dark Energy and Dark Matter

There’s much more (but it won’t move) here


1. Dark energy


  1. Our universe is both ancient and vast, and expanding out farther and faster every day. 

  3. This accelerating universe, the dark energy that seems to be 
  4. behind it, and other puzzles like the exact nature of the Big 
  5. Bang and the early evolution of the universe are among the 
  6. great puzzles of cosmology. 
  7. source



  11. We still don’t know what it is. It is everywhere and we can’t see it. It makes up more than two-thirds of the universe, but we have no idea where it comes from or what it is made of.
  12. New Scientist



  16.  It is 15 head-scratching years   published on 8 May 2013   since we noticed that some mysterious agent is pushing the universe apart. 

  18. We still don’t know what it is. It is everywhere and we can’t see it. 

  20. It makes up more than two-thirds of the universe, but we have no idea where it comes from or what it is made of.
  21. . . . . .

  23. If dark energy remains steady, most of the cosmos will accelerate off into the distance, leaving us in a small island universe forever cut off from the rest of the cosmos. 

  25. If it intensifies, it might eventually shred all matter in a “big rip”, or even make the fabric of space unstable here and now. 

  27. Our best estimate today,  ... , is that dark energy’s density is fairly stable. 

New Scientist     More here




2 Dark Matter



        



  2    Pick the dark matter from within the image.  

  1. Intracluster light (blue) in the galaxy cluster Abell S1063. 

  3. One new technique uses intracluster light, imaged by Hubble, to map and study dark matter. ...

  5. Dark matter remains one of the great mysteries of modern science. 

  7. A theoretical form of matter, dark matter is thought to make up about 85 percent of all matter in the universe. 

  9. Because dark matter doesn’t absorb, reflect or emit light, it is very hard to spot. In fact, it has never been directly observed and some even question whether ... dark matter actually exists.  source  cluster


  12. We look at a minimum of terms within the talk.  

  14. There are numerous great mysteries within modern science.  

  16. Dark matter is tied into gravity and gravity is a key word within our look at the evolution of the universe.  That itself is key to understanding the beginning of the solar system.  

  18. About one-quarter of the universe consists of dark matter, which releases no detectable energy, but which exerts a gravitational pull on all the visible matter in the universe. source  3.7 puts it at 85%. 

  20. You pays your money ....

  22. Once one starts on any astronomical/astrophysical trail, the terms pile up.  One more for the moment - dark energy.

  24. Dark energy is the name given to the force that is believed to be making the universe larger. 

  26. Distant galaxies appear to be moving away from us at high speed: the idea is that the universe is getting bigger and has been since the Big Bang. source