Stacy McGaugh, director of the Warner and Swasey Observatory at Case Western Reserve University, will present "Gravity and Cosmology a Century after Einstein" at 7:30 p.m. Thursday, April 7, in 152 ...
Spiral galaxies rotate at such a high speed that the gravity calculated only from their visible stars could not prevent them from dispersing. To solve this puzzle, physicists have postulated the ...
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