Newtonian's tube itself acts as a huge dew shield as well as large mirror's thermal mass keeps it from cooling below dew point fast. However, for a dobsonian telescope the dew on mirrors is not that bad of a problem like it is for refractors and catadioptric telescopes with corrector plate in the front of the tube. There is no way of fighting the humidity in the air, while there are ways to keep the dew away from optics, by using dew shields and heating strips. Both dew on optics and humidity in the air result in halos forming around bright objects, smearing out the finer detail and dimming the view. High amount of humidity in the air will result in two things: dew forming on your telescope parts as it cools down to ambient temperature and general increased light scattering in the atmosphere.Large aperture telescopes are more susceptible to turbulence than small ones as well! Also if you see stars (not planets) twinkling a lot, the atmosphere is not that stable and thus not very suitable for planetary viewing, depending on how turbulent it is the results may vary from mild picture shakyness to absolute crapshoot where no details can be discerned, I've had many nights like this when i couldn't resolve anything on Jupiter. You should view planets when they're highest in the sky, and Jupiter right now is highest in the sky after sunrise, so best time to view it would be just before sunrise.Follow the collimation guide many other have linked, it's a very good one.However, there are many things that can affect your mileage: bad collimation, highly turbulent atmosphere, high amount of humidity hanging in the air and tube currents.
Your scope is more than enough for seeing detail on Jupiter's cloudtops (i've successfuly observed the thing with a 2.7" refractor!). It is one of the first things that I tell anyone interested in buying a telescope so that they are not disappointed thinking they will just be able to see Hubble or low exposure quality images. But, keep in mind, our atmosphere and our eyes filter alot of the "color" you would see. Most are usually very willing to help a new astronomer.Įdit: Also, in regards to color, it generally varies depending on the filter you have or how your viewing conditions are, but you will make out some limited color. 8" Dob is one of the most popular telescopes so most of us either have one or at least worked with one at a star party, so you shouldn't have a problem finding people to help you. If you are still not comfortable, then you could go to a star party and ask people there to help you learn.
SEEING JUPITER THROUGH A TELESCOPE HOW TO
Orion usually has very informative videos on how to do this too, so you can check there as well. There are various videos on the internet on how to do it. It can be very intimidating at first considering it can be easy to screw up your mirrors if you are not careful, but you will want to learn how too. Nick Strobel's "Astronomy Notes" Textbook.Heavens Above (Satellite/Spacecraft Tracking).What Was That Bright Moving Object I Saw? Tonight's Sky (For advanced users, requires latitude & longitude) This Week's Sky at a Glance (Sky & Telescope) How do I Become an Astronomer/What do Astronomers Do?Īdvice for First Time Telescope Buyers by Joe Roberts "We are a way for the cosmos to know itself." "Astronomy compels the soul to look upward, and leads us from this world to another." For sub rules, please visit the redesigned reddit page.
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