Eta Carinae
Eta Carinae is a small star system containing at least two stars. One of them is expected to explode in a supernova in the relatively near future, although it's very unlikely to happen within our lifetime.
Hubble Space Telescope image from 1995
Facts About Eta Carinae:
The system contains at least two stars, of which the primary is a luminous blue variable (LBV) that initially had around 150 solar masses, of which it has lost at least 30. (Wikipedia)
Classification: Star System, variable
Constellation: CarinaDistance: 7.57e+16 km (8000 ly)
Magnitude: -7.0000 (abs)