The Horsehead Nebula has no internal source of light, but is heated by a nearby complex called Sigma Orionis – a system of ...

This Hubble mosaic is the highest resolution image ever made of the entire Crab Nebula, which is located 6,500 light-years away. These opaque, dark knots of gas and dust called "Bok globules" are ...

The bright variable star V 372 Orionis takes center stage in this Hubble Space Telescope image, which has also captured a smaller companion star in the upper left of this image.

According to the most widely held astronomical model (the nebular hypothesis), new stars are born from massive clouds of dust and gas (aka a nebula ... disks in the Sigma Orionis cluster, a ...