Runaway star escaping Milky Way wasn't thrown out by galaxy's blackhole

gb wrote:
If the star has dark matter of its own, it would gain speed. Say its
mass is less
than 10 times the mass of our Sun, but the remaining gravity is the
dark matter
component. Any dark matter halo is typically very small around stars,
but this
star may have it. As it goes and enters gravitational fields of other
stars and the
galaxy's gravitational field, it always ends up gaining speed in the
presence of other gravitational fields. Now probably something else
happens,
but such accelerating and coming out of gravitational fields faster
might explain
dark energy, and anti-gravity results from combusted gravity inside
and momentum
gain.

All very interesting as theories go, except that dark matter has never
been seen to accumulate around a star. If there are 300 Ms stars out
there, then it's probably as a result of a merger between a couple of
150 Ms stars. Such a merger would in itself be quite a spectacular site,
perhaps a source of GRBs in its own right.

Yousuf Khan