Telescope Definition and 506 Threads

Please help! # A telescope has an objective of focal length 50 cm and an eye piece of focal length 5 cm. It is focused for distinct vision on a scale 200 cm away from the objective. What is the linear magnification of the telescope numerically? Also what is the magnifying power of the telescope...

Slightly off topic, but could any of you recommend a telescope for a beginner? I would love to make this a hobby. I don't want anything too fancy (within a hundred dollars?), just something to inspire me. I have free time this summer.

Hey all!, I'm working on a project in which I have to design the shape of a mirror to focus X-rays. This is basically what I've done so far so far. I've found that if you use a parabola mirror it will focus parallal rays, but not off-axis ones. If you then add a second mirror in the form of...

i am to design a keplerian telescope with 7X magnification, 5mm exit pupil, and at least 10mm eye relief. I have one lens with focal length 35mm, another with focal length 5mm, giving a visual mag of 7X and the exit puiple is 5mm, but how do I account for the 10mm eye relief?

I know this guy, and he say the Hubble telescope is worthless and has never done anything because it cannot take clear pictures of the Apollo landing site. This because he think it was a hoax and he wants proof:rolleyes: . He is currently not convinced of the reason Hubble cannot take such...

What should I look for when I buy a telescope?

Here are some images from the Very Large Telescope project. Some pictures are over 70MB! http://www.eso.org/outreach/gallery/vlt/images/Top20/Top20/topvlt.html

How is the principle of the operation of radio telescope? I am interesting that how can radio telescope translate signals to image. Does any experts can tell me?

I was just reading about the Hubble Telescope and I saw something saying that the planetary camera on it had a field of view of 2.5' x 2'. I don't actually know anything about astronomy so I was just curious what the field of view is? I found that the ' meant arcminutes, but that doesn' help...

Hmmmm well i purchased a meade 2114 atts reflector telescope and in the manual and on the star guide it shows you can veiw comets and stars and even Jupiter and Mars and all the planets well when i tell it to find these its motors kick on and it moves and then stops and see that it has...

Well like the title says I'm buying a new telescope and would like to know what y'all think would be the best for looking at Galaxies and Nebulas, PRICE IS NOT A PROBLEM though I would like to keep it lower then $3,500.

Is it true that it can eavesdrop the entire galaxy?, like it has the ability to scan the whole galaxy?

IS it possible for this one? I was given an older Meade telescope today the specs: StarQuest Model: 60AZ-M 60mm (2.4") Altazimuth refratcing telescope Lens specs: - 5x24mm viewfinder - SR4mm H12.5mm and H25mm eyepieces (0.965" barrel diameter) - 2x Barlow lenses What can i...

The idea popped into my head today of building an extreme telescope (larger than hubble) to orbit an outer planet such as Jupiter etc.. I'm thinking that with it being past the asteroid belt, we would be able to see farther and clearer than with the hubble. Is this an accurate assumption? The...

A few months back my brother dug this telescope of his garage and brought over to mine. I have had it out and was able to get a good look at the last quarter of the last moon, and a good look a Jupiter, with 2 moons visible. Somewhat to my surprise I was even able to resolve a couple of bands...

I decided to dust off my old telescope to see what I could see. I was looking at the moon and messing around, but I could only get a sharp image with the eyepiece removed. Without the eyepiece, I can focus in a good image with my glasses on or off, but with it in it is only a blob of white...

Aware of any web sites that allow you to view the night sky without going outside right on the web such as just point and clicking. I am not talking about SLOOH that apparently after reading briefly allows you to watch for 15 minutes at objects you have no choice in watching. If anyone has any...

Could anyone suggest good equipment for astrophotography? What is the most cost-effective digital camera and (digital camera compatible) telescope?

Hello everyone. I'm finishing up my diploma in Computer Engineering Technology, and it is time to start thinking of final projects. Basically we have to build something that incorporates a microcontroller and we can do pretty much anything we want. I have decided to build an equatorial...

like the hubble, but much more powerful, away from Earth and was able to accelerate it to near the speed of light by either gravity or some future ion accelerator. Would everything on Earth speed up for the observing telescope and hence allow us to see into our own future?

Could i even get a good teloscope for less than 100$ or are they a lot more then that. I'm guessing i can't but meh? Thanks

Anyone has the dia gram of recently used astronomy telescope? Can you let me see?

Hi and hello. I’m new here and this is my first post. How to design a telescope guys?

has anyone built this, something similar, or know anything about it? i found it on the internet and decided it was good to build seeing as i already have a satellite dish not being used. does anyone know of anything perhaps better to build? I've never built a radio telescope before, or any...

i just bought a telescope and i am in Canada it iz really cold outside and i want to take it outside to look at the stars but someone told me that moisture would get stuck in the lens and it would be ruined can somebody tell me if this is true personally i don't think it would but i don't want...

http://www.universetoday.com/am/publish/work_begins_mgto.html I hope that this monster can be able to see the Population III stars and who knows, perhaps also the last scattering surface?

Which would be a better gift? A 60mm refractor or a 10x50 binocular?

What is the Soligor 8in telescope like? I seen it in a camera shop in town yesterday for i think it was either 699 or 799 euros. Is it worth it? Is it a quality telescope for quality images of the nightsky such as planets, galazies & nebulas?

I'm looking to buy a telescope pretty soon. I've wanted one for a long time but now I will be able to get one finally. The problem is that I have NO idea where to start with looking for what to buy though. Was hoping for some pointing in the right direction (hopefully this forum is the right...

URGENT Can you please help! Hello, I have just finished what seems like an infinite amount of questions for this lab report. 2 of them I am just not sure how to proceed. Any help would be appreciated. Question 1: In a film projection apparatus, it is desired to produce pictures 12 ft...

I took a picture of Jupiter's moons without a telescope. This is from my 300 mm zoom lens on my Canon Digital Rebel: http://orbitsimulator.com/orbiter/jupiter.jpg

Hi everyone, I'm finally buying my first astronomical telescope, and was wondering if any of you have an opinion to offer on what a good choice would be. My price range, including a few extra eye pieces, is anything under about $US700. I was thinking a 6 or 8 inch reflector, dobsonian mount...

It was great, but I only got to see the moon. The sky was a little cloudy, and was not close to clear. It won't be for a few weeks apparently, which sucks. There was also a considerable amount of wind, which kept moving the telescope. Another one of my problems is that my telescope camp...

alright...i have no experience with this...kinda weird i don't to think of it...anyways at the observatory i work at i was going though a closet and behold I find a Meade 8" F/10 SCT...it seems to be an older model b/c it just says LX on it...not even "LX200" or something like that plus it looks...

I was reading a book by Timothy Ferris and he mentioned something about if we could create a neutrino telescope we could see back in time to something like 1 second after the big bang. does anyone know if one of these telescopes could be made and what do you think we would see with them?

Hi, I am looking to buy a Schmidt-Cassegrain Scope for 1,999 euros. But I am unaware of the quality of this scope. Can anybody tell me what the image quality/details are like. Can you see for eg M42 clearly or Andromeda. Can you see details on Jupitar like the Giant red spot or the...

The first object I ever viewed was Saturn back in about 1990 at a Field Night at a school set up by an Astronomy Club. I later joined that club for about 10 years.

Through my school, I'll be working with a radio telescope. I was wondering if you guys had any ideas or suggestions of cool things that I could research or observe with the radio telescope. Thanks!

Any telescope experts? My son is interested in Astronomy (I may have a little interest also). Anyway, I am going to buy him a telescope, but have not clue where to start. He has a cheap one now that is completely worthless, expect mayby to look at sun bathers. So I would like to buy him...

Ok I'm working on my geometric optics homework and this is the last problem and I can't seem to get it right. An 6 astronomical telescope has a 32 cm focal-length objective lens. After looking at stars, an astronomer moves the eyepiece 1.0 cm farther away from the objective to focus on nearer...

Telescope spies 'youngest' planet An impression of what it might be like in the CoKu Tau 4 system Nasa's Spitzer telescope has found evidence around a distant star for a planet that may be less than one million years old. The infrared space observatory studied five stars in the...

I saw once a while back on the History Channel that Hubble looks something like 14.5 billion years into the past? I know very very very little about physics but this has me very interested. Could some one clarify this a bit? I assume that the reason Hubble looks into the past is because the...

Greetings All, I am attempting to develop a software simulation of the dynamics involved in machine figuring concave parabolic telescope mirrors. As a member of the amateur telescope making community, we currently don't have any tools to do this other than the "trial and error" method...

Is there any site that discuss about making telescopes that is fairly simple?

According to this article, some powerful folk are fighting O'Keefe's decision: http://skyandtelescope.com/news/article_1160_1.asp You might want to have your say too.

Some may be aware that 10 years ago or so, Texas Instruments began manufacturing a display device using nano-technology. It consists of a two dimensional array of mirrors. Each mirror can be actuated to lie at a different angle. It is strictly a binary device; a mirror is at one or the other...

If a telescope is 2 time bigger in diameter then you can see object 4 times fainter, but does that mean that object appear 4 times brighter?

Hi: I was looking for ideas for a homemade telescope for my son and saw this site, http://www.geocities.com/telescope1999/14-5inch.html Paging down some I saw that he made a telescope lens from the bottom of a bottle. It this possible? Did Bernard Schmidt really make such a...

While some comets are only visible with the help of a telescope, this comet, seen in 1965, was visible to the naked eye even during the day! What comet was it?

NASA have definitelly chosen the primary mirror for the JWST. It will be a berylium-based mirror. The JWST will be launched in 2011 to replace the Hubble www.universetoday.com/am/publish/james_webb_mirror_approved.html Woa! I can't wait til then!