Some 1,300+ light years away, south of Orion’s Belt is the Orion Nebula, one of the most extensively studied celestial features in the sky. It is also known as the Great Nebula in Orion, the Great Orion Nebula, Messier 42, M42, or NGC 1976. The nebula's diameter is about 24 light-years across, and the stars in Orion are only about a million years old.

Like others of its kind, the Orion Nebula is an interstellar cloud of dust, hydrogen and helium gas, and plasma. After some time, the components that make up the nebula may come together due to their gravitational attraction. As layer upon layer of dust, gas and plasma are drawn together, those at the core will experience extreme pressure.

... Light travels 186,000 miles per second ... 31,577,600 seconds per year x 24 years ( so there are 757,382,400 seconds in 24 years ) therefore the Orion Nebula is 757,382,400 x 186,000 miles across ... mind blowing ...


click here or on the pic of Orion to get more info