Just How Dark is Dark Matter?
How do you get a glimpse of dark matter? Stare really hard at the outskirts of galaxies and hope the matter isn’t totally dark.
How do you get a glimpse of dark matter? Stare really hard at the outskirts of galaxies and hope the matter isn’t totally dark.
New dynamical simulations show that close-in planets on eccentric orbits can arise from planet-planet scattering — but only if the scattering occurs on larger orbits and is followed by inward migration.
If WIMPs are the solution to the dark matter problem, it’s reasonable to ask what sort of impact they would have on human beings. This paper answers that question.