Some stars explode in slow motion. Rare, massive Wolf-Rayet stars they are losing mass rapidly by means of a very strong stellar wind, with speeds up to 2000 km/s. They typically lose 10 solar masses a year, a billion times higher than the sun.
Impressive ongoing galactic fireworks, about 23 million light years away. Rather than paper, powder and fire, this galactic light show involves a giant black hole, shock waves and vast reservoirs of gas.