During the 18th century, famed
French astronomer Charles Messier observed several objects in the
night sky. He had mistaken them for comets initially. But realized they were
not. He began a creating a list of them which is now famoulsy called Messier
Catalog which inlcudes 100 of the most amazing objects of night sky.
One of these objects is the Orion
Nebula or M42, seen above, the real picture has been taken last month by a
powerful ground based telescope located on top of a mountain in Chile. Located
around 1350 light years from earth in the costellation of Orion, it is the
closest region to earth, a massive star forming region where new stars are
being born from the interstellar clouds of Hydrogen, Oxygen etc. The Orion
Nebula is an enormous cloud of gas and dust, one of many in our Milky Way
galaxy.
The nebula has revealed much about
the process of how stars and planetary systems are formed
from collapsing clouds of gas and dust. Astronomers have directly
observed protoplanetary disks, brown dwarfs etc. The Orion Nebula gets its
reddish hue from hydrogen gas, which is energized by radiation from newborn
stars. While the red areas are emitting light, the blue-violet regions in the
nebula are reflecting radiation from hot,
blue-white O-type stars. “When you look closely, you see that
the nebula is filled with hundreds of visible shock waves,” said Bob O’Dell, an
astronomer from Vanderbilt University. He has also created a map of 2 star
forming regions where winds have been blowing for atleast 1500 years.
For most observers, it appears to
have a slight greenish color – caused by oxygen being stripped of electrons by
radiation from nearby stars. A Stunning Visual Feast!
Photo/Info Credit: NASA, UniverseToday

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