It’s difficult to tell how the individual stars of a galaxy rotate. What can we find out just from their metal content?
A newly discovered stellar stream may be the long-searched for tidal debris from the Milky Way’s largest globular cluster.
Can an unexplained signal found inside multiple galaxy clusters tell us something about dark matter? Find out about a tantalising indirect detection by X-ray astronomers.
The discovery of a second dark matter deficient galaxy by van Dokkum et al. has caused the debate on galaxies lacking dark matter to resurface.
Today’s paper makes predictions for the yet-to-be-observed dwarf galaxy population around Andromeda’s satellite galaxy, M33. It provides scientific justification for a future mission with WFIRST.
We report on Day 4 of the winter AAS meeting in Seattle, WA. Highlights include an exploding space cow, a discussion of data in astronomy, the latest look at the possibility of life beyond earth, and an exploration of climate impact much closer to home.