Secrets of Dark Matter
Short versions: kinematic constraints show CDM has dispersion ~ 10 km/sec, irreducable, and characteristic scales of ~ 300 pc.
So it is not very cold.
Speculations on astronomy, astrophysics, news I find interesting,
theoretical issues, science and science policy.
In particular: gravitational radiation sources, black holes, planets and astrobiology.
I will digress into computational physics, science fiction and general issues and basically whatever I feel like whenever.
And, of course, cats.
Steinn Sigurðsson is an astrophysicist at Penn State.