You may need to take into consideration and portability - These telescopes can get heavy and depending on your location you may want to pack it up in the car and take it out to darker skies. The Meade 8" LX90-ACF Advanced Coma-Free (ACF) optical system takes all of the features of the Meade SC models and then ups the ante. This is because during the daytime - atmospheric turbulence doesn't allow a larger telescope to fully utilize its resolving power. Plus, a closed tube significantly helps keep the optics clean. Deep sky objects (DSO) is a general name for galaxies, nebulae and star clusters - objects beyond our solar system. When I use an 11mm Plossl eyepiece (almost 200x magnification) for example, I can easily see the Cassini Division in Saturn's rings. It is specially designed to provide you with a smooth and accurate performance. In this particular example - The Great Andromeda galaxy through a large telescope : Effects of light pollution on fainter DSO such as distant galaxies will be even more dramatic. When I look at Jupiter, the pale orange color of Jupiter's famous Great Red Spot is visible, and I've even been able to identify the polar caps and spot dust storms on the planet Mars. Most of the deep sky objects are really faint and a beginner will have a hard time trying to see fine details or resolve the faintest objects. As you can see - many fainter galaxies become invisible in areas with stronger light pollution: If you plan to observe deep sky objects from an area with a moderate light pollution - it is best to concentrate on objects like open clusters, double stars, brightest of the emission nebulae and also some bright planetary nebulae (due to their high surface brightness). Asteroids are rocky objects in inner solar system, and through a telescope the biggest of them appear as simple stars. And a low power 32mm Plossl eyepiece is a good choice for views of larger deep space highlights like the Andromeda Galaxy and the Orion Nebula. They put money into the optics which is where the money needs to go! template left */ As you can see in the following example - the planetary discs look really small through an eyepiece. Living in a light polluted urban area does not mean you can't observe the deep sky. Schmidt-Newtonian corrector lenses and mirrors are individually figured to create a superior optical system which is renowned for its exquisite smoothness and performance. There are 8 planets in our solar system you can observe, however only three of them will show notable surface details: Jupiter, Saturn and Mars (mostly during opposition). Another factor affecting our ability to observe DSO is sky darkness, and it is even more important than aperture. This size and type of telescope has been pretty much perfected and been around for a long time. If price is a concern but you still want to get it reasonably light then go with a dobsonian. Aperture is the diameter of the objective lens or a mirror - it defines how much light the telescope gathers and its maximum magnification (resolution). google_ad_client = "pub-1262100336529291"; At low magnifications it will look approximately the same through any telescope. Most of the deep. If you observe in the middle of a big, light polluted city - even owning a huge, 100000$ telescope won't help. If you are a serious hobby astronomer, want to take fantastic pictures or are looking for your second and bigger telescope the 8 inch size is a good choice for you. A 6 inch scope is a great beginners scope. MEADE 0805-05-02 Lightbridge Truss Tube Dobsonian with 8 - This Meade telescope is comparable to the Orion but with the Lightbridge truss tube set up it is significantly lighter and easier to transport. Celestron NexStar 8 SE Telescope w/ Fork Arm Mount and 40,000 + Object Database - Demo Model Celestron's Nexstar 8 SE telescope combines excellent optics and computerized "GoTo" tracking in a package that's light, portable and affordable. The following images show comparison of how Jupiter and Saturn should look in different instruments, at their highest useful magnifications: In order to see fine planetary details - the telescope, apart from quality optics and sufficient aperture - must be properly collimated and, in case of larger apertures, properly cooled. Also color differences between some pair provide an impressive sight. These stars will still look "dot like" but instead of a single star - you will see two or more placed closely together. 8 inch would be even better but 6 is good. You should make sure it has a 2" focuser. For more examples visit a gallery in "sketches of deep sky" section. If observed over a period of several months/years - some pairs will show noticeable change of relative position.