Due to my interest in astrophysics, I have decided to consider purchasing a telescope. I am looking for something under 1.4k that would allow viewing of Jupiter, the moon, Saturn, venus transit, and deep space objects such as the Orion Nebula, Crab Nebula and possibly M-27, M-51, Triangulum, lagoon nebula, etc. http://www.telescope.com/Orion-10-f39-Newtonian-Astrograph-Reflector-Telescope/p/99602.utsp I also understand the basics of focal length, etc. I am wondering what is the recommendation for good planetary viewing and very good deep space viewing (Nebulae, etc.). I've also read from here: https://www.astronomics.com/what-can-you-expect-to-see-in-a-telescope_t.aspx That a 10" or larger would enable me to see detail on Jupiter, Saturn, The moon, and see distant Nebulae and certain galaxies and such with quite good detail. Can anybody recommend the best scope for me?