Physics – Geophysics
Scientific paper
Apr 2012
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012a%26g....53b...5.&link_type=abstract
Astronomy & Geophysics, Volume 53, Issue 2, pp. 2.05-2.05.
Physics
Geophysics
Scientific paper
The Bullet Cluster is the type example of the behaviour of dark matter in a fast galaxy collision: the dark matter haloes of colliding galaxies do not interact but continue on their way, taking the visible galaxies with them, while the hot gases from each galaxy interact. Now data from a galactic merger in Abell 520 suggest that dark matter does not always behave in this way.
Gravitational microlensing data suggest our galaxy may be awash with nomad planets, wandering in space far from host stars. Researchers at the Kavli Institute for Particle Astrophysics and Cosmology estimate there may be up to 100 000 such planets in the Milky Way alone - and they may hold life.
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