Arp-Madore 2 (also known as AM 2) is an open cluster of stars in the constellation of Puppis. It is almost 30,000 light-years away and about 5 billion years old.[1]
See also
References
- ^ Lee, Myung Gyoon (February 1997). "UBVI CCD Photometry of the Remote Old Open Cluster AM-2". Astronomical Journal. 113: 729–739. Bibcode:1997AJ....113..729L. doi:10.1086/118292.
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