Sirius

Sirius is the brightest star in the night sky: over 20 times brighter than our Sun and over twice as massive.
It is at 8.7 light years distance in the constellation "Canis Majoris".
sirius is actually a binary system: Sirius B is 10'000 times dimmer than the bright primary and is a white dwarf.

Click here to see a picture of sirius in X-rays "light"