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1 vote

Ejected galaxies, dynamical friction and dark energy?

Dynamical friction scales like $F\approx C G^2M^2\rho/v^2$ where $\rho$ is the density of the medium and $v^2$ its velocity dispersion. Once a galaxy is outside its cluster, $\rho$ presumably goes ...
Anders Sandberg's user avatar
-2 votes

Would gravitational waves be subject to external gravitational perturbations?

This question is difficult to answer. If GW behave like "normal" waves, obstacles in the inner Fresnel zone are the main nuisance. The diameter of possible objects should be larger than $\...
9herbert9's user avatar

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