Canis Major
Canis Major, Latin for 'Greater Dog,' is a prominent constellation in the southern sky. It is home to Sirius, the brightest star visible from Earth, and contains several notable deep-sky objects, including the emission nebula NGC 2359, also known as Thor's Helmet.
Source: science.nasa.gov
APODs including "Canis Major"
Launch to Lovejoy
22/01/2015
Blasting skyward an Atlas V rocket carrying a U.S. Navy satellite pierces a cloud bank in this starry night scene captured on January 20. On its way to orbit from Space Launch Complex 41, Cape Canaveral Air Force Station, planet Earth, the rocket streaks past brightest star Sirius, as seen from a dark beach at Canaveral National Seashore. Above the alpha star of Canis Major, Orion the Hunter strikes a pose familiar to northern winter skygazers. Above Orion is the V-shaped Hyades star cluster, head of Taurus the Bull, and farther still above Taurus it's easy to spot the compact Pleiades star cluster. Of course near the top of the frame you'll find the greenish coma and long tail of Comet Lovejoy, astronomical darling of these January nights.