Horsehead nebula, what size telescope do i need to see it?


Posted March 11th, 2010 by admin 9 Comments »
telescope
gdsvalentine asked:


I would like to view the horsehead nebula, along with lots of other things, but I am not sure what size telescope to get, I don’t want to spend a fortune though. Would a 4inch reflector do it or would I be better off with a refractor?

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Posted in Astronomy & Space | 9 Comments »

What is the minimum size telescope needed to resolve this binary?


Posted December 21st, 2009 by admin 2 Comments »
telescope
CLayton asked:


An observer is using a telescope to resolve a binary star with a separation of 0.40 arcseconds using a filter which passes light at 5000 A. What is the minimum size telescope needed to resolve the binary?

Steps would be much appreciated.

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Posted in Astronomy & Space | 2 Comments »