NGC 7538

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Description: This nebula has been the subject of much investigation recently due to the discovery of a high mass protostar that has a diameter of about 10 of our Solar Systems. A protostar is a mass of gas and dust that is collapsing to form a star. Protostars are hard to study because they are born in obscured regions. Methanol masers are often used to penetrate these obscuring regions and provide information about this little understood process.
Constellation: Cepheus
Distance: 7000 light years
Apparent Size: about 8 x 7 arc seconds
Date: 21 july, 6 august, 3 september 2005
Equipment: 12" RCOS RC, ST10XME, AP1200
Exposure: HaRGB: 270-60-75-60 minutes