Visitors Now:
Total Visits:
Total Stories:
Profile image
By ScienceBlogs (Reporter)
Contributor profile | More stories
Story Views

Now:
Last Hour:
Last 24 Hours:
Total:

Why Are Dark Matter And Modified Gravity In Such Conflict? (Synopsis) [Starts With A Bang]

Tuesday, November 1, 2016 14:09
% of readers think this story is Fact. Add your two cents.

(Before It's News)

“All we know so far is what doesn’t work.” -Richard Feynman

The past month has seen a slew of papers out highlighting the tension between modified gravity and dark matter. Both recognize the same puzzles and problems with the Universe, and both ideas recognize that either one could be valid. In fact, if you look at the two greatest “crises” in gravity in the 19th century, it’s arguable that dark matter (Neptune) solved one, the Uranus problem, while modifying gravity (with Einstein’s general relativity) solved the other.

The X-ray (pink) and overall matter (blue) maps of various colliding galaxy clusters show a clear separation between normal matter and dark matter. Image credit: X-ray: NASA/CXC/Ecole Polytechnique Federale de Lausanne, Switzerland/D.Harvey & NASA/CXC/Durham Univ/R.Massey; Optical & Lensing Map: NASA, ESA, D. Harvey (Ecole Polytechnique Federale de Lausanne, Switzerland) and R. Massey (Durham University, UK).

The X-ray (pink) and overall matter (blue) maps of various colliding galaxy clusters show a clear separation between normal matter and dark matter. Image credit: X-ray: NASA/CXC/Ecole Polytechnique Federale de Lausanne, Switzerland/D.Harvey & NASA/CXC/Durham Univ/R.Massey; Optical & Lensing Map: NASA, ESA, D. Harvey (Ecole Polytechnique Federale de Lausanne, Switzerland) and R. Massey (Durham University, UK).

Now in the 21st century, we have a whole Universe to explain, and while dark matter is definitely the leading theory, the idea of modifying gravity isn’t crazy. Moreover, it has a success that dark matter can’t match: on galaxy-scales and below.

The details of the small-scale structure predicted by dark matter do not match with what we observe. The hope of the dark matter camp is that improved simulations and models will come to reproduce them accurately and robustly. Image credit: NASA, ESA, and T. Brown and J. Tumlinson (STScI).

The details of the small-scale structure predicted by dark matter do not match with what we observe. The hope of the dark matter camp is that improved simulations and models will come to reproduce them accurately and robustly. Image credit: NASA, ESA, and T. Brown and J. Tumlinson (STScI).

In the end, it will take a big step forward for a true victor to emerge, but here’s where the science stands right now.

Report abuse

Comments

Your Comments
Question   Razz  Sad   Evil  Exclaim  Smile  Redface  Biggrin  Surprised  Eek   Confused   Cool  LOL   Mad   Twisted  Rolleyes   Wink  Idea  Arrow  Neutral  Cry   Mr. Green

Top Stories
Recent Stories

Register

Newsletter

Email this story
Email this story

If you really want to ban this commenter, please write down the reason:

If you really want to disable all recommended stories, click on OK button. After that, you will be redirect to your options page.