Cassegrain Telescope Astronomy What do galaxies look like through a telescope?
Hey watsup everyone...im pretty new to backyard astronomy, but i've been learning alot since I started a few weeks ago. I saw the Orion Nebula for the first time through my telescope to night, and it was pretty sweet!! I am very excited to start looking at galaxies, although I lack the experience and knowlege to properly find/identify them. Here is my first question: When looking at a galaxy at very low magnification (48X), will you see it's shape, or will it be a point of light like all the other stars? Do you have to find the galaxy first and then increase magnification in order to see it's shape? Or will you recognise it right off as a galaxy, even at low magnification? By the way, I am using a 3.5mm Maksutov-Cassegrain telescope. Is this telescope suitible? Thanks in advance.
Don't know if that's got enough resolution to make out a galaxy, but good luck. I was impressed with Jupiter and it's moons over the summer, so a galaxy must be amazing.
Telescopes Wikipedia Who was the first to use the telescope for scientific purposes? Galileo? Harriot?
My astronomy professor says that it is a common misconception that Galileo was the first to use telescopes for scientific research. He said that Galileo did not even invent them. And instead, Galileo mostly just made and sold telescopes.
I'm not sure about Thomas Harriot, but him and Galileo were the only two choices left for the exam question above.
All Google searches and Wikipedia articles didn't really specify the answer to this question
Anybody know?
Thanks!
Harriot is the first person known to have sketched the moon from a telescopic view, a few months before Galileo.
It's also well known that Galileo did not invent the telescope.
Telescope How do i properly package a telescope for Ebay?
I threw away the box my telescope came with and i want tips and help on how do i properly package a telescope because i am going to sell and post to customer from ebay.
Yes, BUBBLE WRAP and tape it well. Send it insured. BOX?
Although you didn't specify the dimensions, there are two USPS Priority Mail Boxes that should work:
Yes, you will have to order a minimum of 10, but they are FREE and the post office will deliver them to your doorstep FREE. You won't find these boxes at most post offices. Sign up for FREE at the USPS website. It will take about a week for delivery.
PlaneWave Instruments at AIC 2009 - Sky & Telescope
What is the minimum size telescope needed to resolve this binary?
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.
The Raleigh Criterion for angular resolution is probably the limiting factor here.
sin(theta)=1.22*(wavelength)/(diameter of aperture)
Rerranging:
Diameter=1.22*(wavelength)/(sin(theta))
=1.22*(5000e-10 m)/(sin(1.94e-6 radians))
=.31 meters in diameter
Dobsonian Telescope Will the eyepieces from my Newtonian telescope work in an Orion SkyQuest XT8 Classic Dobsonian Telescope?
Sorry if this is a really dumb question .....
The eyepiece is 1.25" and 20mm erect. The Newtonian also came with a 1.25" Barlow lens 3x.
All the eyepiece says is Celestron 20mm Erecting Eyepiece. Then the other one is just a Barlow Lens 3x. It also came with a Celestron 4mm piece but I didn't know how to use it ......
An Orion 8" classic should accept 2" and 1.25 eyepieces without any problem.
Wally