Spur and gap features seen in Milky Way’s GD-1 stellar stream could be caused by a self-interacting dark matter subhalo. New research points to a dark matter subhalo as the architect behind the unique ...

Jamie Carter is an award-winning reporter who covers the night sky. Summer is the best time of year for seeing the Milky Way from the northern hemisphere—and parts of August are the very best.

Jamie Carter is an award-winning reporter who covers the night sky. The core of the Milky Way in Sagittarius low in the south over the Frenchman River valley at ... [+] Grasslands National Park ...