4

The basic issue with a large optical telescope is to keep all of the mirror in an extremely stable position relative to the rest of the mirror. Depending on the wavelength of your light you probably want to limit deviations from your perfect shape to less than about 100nm, so, you need to account for and deal with somehow any force which might act on one ...


4

It is an image taken with the new narrow field mode of the MUSE instrument using the GALACSI Adaptive optics module on a single (UT4) VLT telescope using laser guide stars. I am having a great deal of difficulty (e.g. from this press release) in working out at what wavelength(s) this image was taken. I do not believe that the AO system is working at blue ...


3

In order to reach the stability required for planet detection, the majority of high resolution echelle spectrographs are mounted off the telescope in a stable environment. This involves pressure and temperature stabilization, often by housing the spectrograph in a vacuum vessel. In order to feed the spectrograph with light from the telescopes, and to ...


2

According to Wikipedia, the angular resolution is inversely proportional to the baseline (the separation between the telescopes). The order of magnitude of the baseline of the Event Horizon Telescope is 10,000 km; the Earth-Moon distance is about 40 times larger, and Earth-Mars at its maximum 25,000 times larger. That means we could theoretically reach 1.5 ...


1

The paragraph you quote continues... The images from SQUEEZE and MiRa have very similar characteristics and are shown in Fig. 1 (see also the Image Reconstruction section in Methods) In that section various tests are described including the reconstruction of simulated data, with similar interferometric coverage and signal to noise, from spotted and ...


1

A space based radio telescope has been tried, although I can see little evidence of it being successful. To get an image you do need baselines at multiple angles, not just a single line. This can be achieved on Earth with just two telescopes by combining measurements made at different times as the Earth rotates, and an Earth-Moon baseline could be treated ...


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