March 6 , 2010
M35 and NGC 2158 A pair of open clusters in Gemini. The smaller one, NGC 2158 is more compact and older. M35 with the numerous blue stars is younger and 4 times closer to us at 2800ly away. Imaging Details: QHY8, AT8RC @ f8, 20x5min or 1hr 40min total exposure time.