Orion Trapezium Cluster: A
star-forming region in the constellation of Orion.
Caption: The Orion Trapezium cluster
is a subgroup of very young stars concentrated in a region only
3 light years across at the core of the Orion Nebula star
cluster. The Trapezium cluster offers a prime view into a
stellar nursery. It is composed of stars with a median age of
around 300,000 years, and at a distance of 1400 light years, is
one of the nearest star-forming regions to Earth. The Chandra
X-ray Observatory identified X-ray emission from individual
stars in the Trapezium for the first time and found that almost
all of their upper atmospheres, or coronas, are much hotter than
expected. Chandra also detected several stars that are still
surrounded by protoplanetary disks, for example the blue object
on the lower left.
Chandra X-ray Observatory ACIS
Image
CXC operated for
NASA by the Smithsonian Astrophysical
Observatory
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