Sentences with phrase «significant number of galaxies»
One hint of trouble came to light in the 1970s, when astronomers realized the outer portions of a significant number of galaxies were rotating inexplicably fast, seemingly pulled by more gravity than general relativity could explain.
http://discovermagazine.com/
The first confirmation that much of the matter in the universe is invisible came when they noticed that the outer portions of a significant number of galaxies were rotating inexplicably fast.
Not exact matches
«These results are powerful evidence that a significant galaxy evolution has taken place throughout the universe's history, which dramatically reduced the number of galaxies through mergers between them — thus reducing their total number.