Kronos Quartet Aki Takahashi piano These are only the first 10 minutes The whole composition is about 1h20′ video is taken from Hubble telescope images, mixed with NASA animations Video Rating: 5 / 5
If you’re looking for a dual-purpose telescope appropriate for both terrestrial and celestial viewing, then the AstroMaster Series is for you. Each AstroMaster model is capable of giving correct views of land and sky.
Takahashi Mewlon 300 telescope with Takahashi FSQ106 and FS60 on Astro-Physics AP1200 German Equatorial Mount. My imaging CCD camera is a Starlight Xpress SXV-M25 one-shot colour camera.
Latest News
Structures Technology for Large Radio and Radar Telescope Systems
Structures Technology for Large Radio and Radar Telescope Systems
The national interest in large radio and radar telescope systems spans the entire engineering and scientific community, and there is every indication that the country will embark upon the construction of still more of these systesm in the near future. Radio and radar astronomers now require very large mechanical devices. The system specifications lead to structural criteria which are unique and outside the immediate interest and/or capability of most of the structures community.
Radio and radar telescopes and the radomes that may protect them are often enormous structures. Their design presents extremely complicated technological problems. These instruments must operate with precision in varied environments and environmental conditions. Radomes must protect radio and radar antennas without seriously interfering with the incoming information.
The Office of Naval Research and MIT cosponsored an international conference in 1967 on the structural problems associated with large radio and radar telescope systems, the proceedings of which are collected here. The papers in this books deal with the problems outlined above from several points of view. The contents of the papers can be grouped roughly as follows:
1. Requirements and standards for supporting structures, tracking equipment, antennas, and radomes.
2. Design and performance of existing systems.
3. Theoretical analysis of the structures of supporting structures, antennas, and radomes. In some cases the analysis is made for a structure under stress. Computer techniques are described for several problems.
4. Methods for evaluating actual or predicted performance of various structures. Here again computer techniques are employed.
List Price: $ 55.00
Price:
How do Telescope lens work and what are the different magnifications?
Question by troyd.smith: How do Telescope lens work and what are the different magnifications?
I have just come into possession of a used Telescope and am having trouble figuring out how it works. I have it assembled but can’t see anything through the eyepieces that were provided. there are 3 (25mm, 4mm, 2.5mm) and since it is winter the skies are cloudy and I can’t tell which lens is stronger so any info would be appreciated.
Best answer:
Answer by Raymond
The smaller the number on the eyepiece, the stronger the magnification. Therefore, begin with the biggest number 25 mm (it will be the easiest one to focus and the smaller magnification will make it easier to point the telescope to a known object).
Take the telescope outside during the day. (do NOT point it at or near the Sun — the heat from the sun is enough to damage the scope, the eyepiece and, most importantly, your eyes).
Looking down the tube, point the telescope to so far away objects that are surrounded by other objects.
Not at the sun.
Let’s say you found a row of houses three streets away. (far enough away that people will not phone the police to report a peeping tom).
With the higher numbered eyepiece (lowest magnification), try to focus until you see some detail (a wall, a door, a shrub). Remember that the image is normally upside down in a telescope.
Compare what you see (for example, the red house with the blue door) with what you get in the pointer (either a smaller scope, a tiny tube or just a notch outside the main telescope tube). This will tell you how accurate (or not) the pointer is.
Don’t do this using the Sun as a target.
When you are doing astronomy at night, always begin with the lowest magnification in order to find the object in the filed of view (telescopes have very narrow fields of view and it is sometimes difficult to get the object in the field of view). Only after you are confortable with following the object at lowest magnification should you try a higher magnification.
Higher magnifications are OK for the Moon and for planets. They will not give you much joy on stars (except, perhaps, to help you separate bright double stars).
In your case, you’ll find that going from 25 mm to 4 mm will be quite a jump (the field of view will be cut down to only 1/40 of what you started with. Make sure that the object is well centered before going from 25 to 4 mm. In time, you may want to buy yourself a 12 or 15 mm as an intermediate size.
Oh, just in case I forgot to tell you: don’t point the telescope at the Sun.
What do you think? Answer below!
Modeling and Control of Antennas and Telescopes
Modeling and Control of Antennas and Telescopes
The book shows, step by step, the design, implementation, and testing of the antenna/telescope control system, from the design stage (analytical model) to fine tuning of the RF beam pointing (monopulse and conscan). The purpose of this book is to present the implementation of the new theoretical developments in structural dynamics and control theory in the antenna and telescope industry. Also to present the significant improvement in pointing accuracy of the antenna and telescope when the presented techniques are implemented.
This book fills the need in the antenna/telescope control techniques. For long time, since 1990 when the last book was published, there was no publication on the antenna/telescope/radar modeling and control.
Rating: 
(out of 1 reviews)
List Price: $ 129.00
Price: $ 129.00
We only have two telescopes on Earth that are devoted to detecting asteroids and comets. H?
Question by great l: We only have two telescopes on Earth that are devoted to detecting asteroids and comets. H?
Then how would we detect any commets and asteroids in time? Because it’s impossible for two telescopes to look in the right place at the right time all of the time.
Best answer:
Answer by eri
I personally know of more than that involved in the SpaceWatch program. And the new LSST will be surveying the entire sky every 3 nights and looking for new objects, so we should detect anything big enough to cause serious damage well ahead of time.
Add your own answer in the comments!
Refractor Telescope Reviews
Review of Orion Observer 70mm Equatorial Refractor Telescope.
Review of Orion Observer 60mm Altazimuth Refractor Telescope.
Review of Celestron Omni XLT 102 Refractor Telescope.
Dobsonian Telescope Reviews
Review of Orion SkyQuest XT4.5 Classic Dobsonian Telescope.
A review of Orion SkyQuest XT12g GoTo Dobsonian Telescope.
A review of Orion SkyQuest XT8 Classic Dobsonian Telescope.