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High-mass stars are important because they are responsible for much of the energy pumped
into a galaxy over its lifetime. Unfortunately, these stars aren’t understood very well
because they are usually found relatively far away in places where lots of gas and dust
can impede out line of sight. The star cluster NGC 281 is an exception to this rule. It is
located about 6,500 light years from Earth and almost 1,000 light years above the plane
of the Galaxy. This means it’s away from much of stuff that blocks our view. Here we
see NGC 281 in X-rays from Chandra and infrared data from Spitzer. The high-mass stars in
NGC 281 have powerful winds flowing from their surfaces and intense radiation that heats
surrounding gas, "boiling it away" into interstellar space. This process results in the formation
of large columns of gas and dust, as seen on the left side of the image. These structures
likely contain newly forming stars. The eventual deaths of massive stars as supernovas will
also seed the galaxy with material and energy.