Winter open clusters

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NGC1662 is an open cluster in Orion. It has been discovered by William Herschel in 1784. Lies about 1400 light years from Earth, and with apparent magnitude 6.4mag and apparent diameter about 15 arc m... Read More

Frosty Crab

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Two nights ago I pointed telescope one more time to M1 Crab nebula. Transparency was poor, but I was tempted with decent seeing. I was able to gather 150 minutes of light through hydrogen alpha filter... Read More