The glowing blue objects in the photo are not stars, they're clouds of iron that collided with the Orion Nebula. The cloud-like bullets are leaving wakes of hydrogen gas behind them, which are the streams you see trailing behind.

Because the bullets were travelling so fast when they hit the nebula, friction warmed them up to 5000 degrees celcius and caused them to glow blue.

The bullets and their wakes are huge. Their radius is 10 times the size of Pluto's orbit and the wakes are about 1/5 of a light year in length. Astronomers extrapoloated that they must be travelling at 1,440,000 KPH.

What fired the bullets remains a mystery.

:: Source