The largest structures of the universe lie within.
Many of the dwarf galaxies of the Milky Way don’t produce stars. Why?
Supernovae in dwarf galaxies can produce large amounts of cosmic rays, which can drastically affect the galaxies.
Most stars—including Polaris, Sirius, and those in Orion’s Belt—actually hide multiple stars. Some of these stars are on orbits so wide that they may no longer be gravitationally bound. Why?
Mysteriously brief and extremely energetic radio signals are beamed at us thousands of times a day. We thought we finally figured out where one came from… or did we?