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Powerful Optical Telescope Captures First Binocular Images
The Large Binocular Telescope consists of two 8.4-meter mirrors which function in tandem to provide resolution greater than that of the Hubble Telescope. The LBT's first "binocular" images were captured recently, marking the end to a long and laborious construction process. We previously discussed the LBT when images were captured from the first mirror to be installed. Quoting:
"The LBT ... will combine light to produce the image sharpness equivalent to a single 22.8-meter (75-foot) telescope. 'To have a fully functioning binocular telescope is not only a time for celebration here at LBT, but also for the entire astronomy community,' UA Steward Observatory Director, Regents' Professor and LBT Corp. President Peter A. Strittmatter said. 'The images that this telescope will produce will be like none seen before. The power and clarity of this machine is in a class of its own. It will provide unmatched ability to peer into history, seeing the birth of the universe.'"
I would have named it the Binocular Large Telescope.
No, there's no physical limit to how many you can have. But, of course, cost is a factor. The construction of the LBT was very expensive. Each of the 7.5m mirrors alone cost a fortune to construct.
On another mountain outside of Tucson (Mt. Hopkins) is the MMTO (Multiple Mirror Telescope Observatory). As the name suggests, this was a large telescope made from six smaller mirror segments. It has since been converted into a telescope with a single 6.5m mirror. There's a group at the University of Arizona which does adaptive optics experiments with it (MMTAO).
Elrond, Duke of URL
"This is the most fun I've had without being drenched in the blood of my enemies!"-Sam&Max
Huge portions of the electromagnetic spectrum are absorbed by our atmosphere, for instance infra-red. These spectra are totally unobservable from earth and space based telescopes will always be needed. Other technical issues include how long you can sit observing a target, the earth is constantly rotating and while earth based telescopes can track an object it can only do it for a small portion of the day. A space based telescope can (depending on its location) observe a target uninterrupted for days, weeks, months or as long as needed. Now binocular telescopes with a few huge telescopes on earth and a few huge ones on the moon... or even Mars. Now that id like to see... but not so much fund :)