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Lawrence first became interested in astronomy when he was a small boy, around the time of the Apollo Moon landings. His parents bought him a 40mm refractor telescope and very soon, after hunting down the planet Saturn with it, he was hooked. He used a copy of the Times Night Sky to locate Saturn and now supplies the monthly chart for the same ...
Many modern telescopes and observatories are located in space to observe astronomical objects in wavelengths of the electromagnetic spectrum that cannot penetrate the Earth's atmosphere (such as ultraviolet radiation, X-rays, and gamma rays) and are thus impossible to observe using ground-based telescopes. [1]
The problem is that, in today's day and age, it's pretty easy to have a 12 to 14-inch refractor. There are probably hundreds if not thousands out there, and only those that are really old were "large" back in their time period, but that is now a historical note and by today's standards they shouldn't be considered "among the largest".
This is a list of large optical telescopes. For telescopes larger than 3 meters in aperture see List of largest optical reflecting telescopes . This list combines large or expensive reflecting telescopes from any era, as what constitutes famous reflector has changed over time.
On Feb 10th, the comet will be slightly above Mars, as seen in this star chart from EarthSky,” The Canada–France–Hawaii Telescope (CFHT) joint facility tweeted. Strange phenomenon on green ...
Optical telescopes can be classified by three primary optical designs (refractor, reflector, or catadioptric), by sub-designs of these types, by how they are constructed, or by the task they perform. They all have their different advantages and disadvantages and they are used in different areas of professional and amateur astronomy .
The Swedish 1-m Solar Telescope, with a lens diameter of 43 inches, is technically the largest, with 39 inches clear for the aperture.The second largest refracting telescope in the world is the Yerkes Observatory 40 inch (102 cm) refractor, used for astronomical and scientific observation for over a century.
Recent examples of this telescope have sold for well into 5 figures. Today, Tele Vue's apochromatic refractor telescopes, which have reduced chromatic aberration, come in diameters ranging from 60mm (2.4 inches) to 127mm (5 inches). [1] The imaging system ("is" series) telescopes are designed primarily for astrophotography.
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