Unexplained hyper velocity stars have been discovered. Earlier ones at 900 km/sec were spit-out lone survivors of a binary star that was being swallowed by a black hole at the centre of our galaxy. Their path ignored the arms of our galaxy, fleeing the centre. The new ones are just as fast but no one knows what they are moving away from.
A fireball from outside our solar system struck earth. Although rare they are seen from time to time. There is a large rock in captivity that came from beyond the most remote comets and asteroids of our solar system. Related: Last year a survey of meteorite samples came up with one that was probably dislodged from Mercury before landing here.
For general interest, a popular site lists 10 mystery objects in outer space.
The sun's magnetic field completed its flip at the midpoint of twenty-two-year sunspot cycle 24 on December 29th. Nice little write-up at The Independent.
A major solar flare hit earth. The probability of seeing Northern lights near the 49th parallel and south is posted daily in the left side bar at spaceweather.com.