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Optimal telescope size?
Consider a diffraction-limited telescope with unobstructed aperture $D$. Such a scope is capable of yielding an angular resolution $\alpha$ that scales as $\lambda/D$, with $\lambda$ denoting the ...
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Is it possible to surpass the diffraction limit for telescopes?
Telescopes have angular diffraction limit depending on the observed wavelength and aperture diameter.
I've read that it's possible to go beyond the limit for microscopes. But is it possible to do the ...
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Future space-based telescope array
Radio-telescopes (e.g. the Very Large Array (VLA)) can simulate one gigantic dish by using separate smaller dishes.
Q: Could such an array of optical telescopes potentially see an exoplanet at say 20 ...
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What equipment is needed for equatorial drift scanning/TDI with a Dobsonian?
It should be possible to do a "parked scan" along the celestial equator ("stripe 82" and "stripe 10") with a Dobsonian telescope, as no tracking is required. I can foresee two issues, though: first, ...
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Observing through a 90 degrees positioned telescope on a flat surface
Assuming I'm standing in the middle of the ocean with a large telescope, positioned such that it's angle is 90 degrees (i.e, it's parallel to the sea) and assume that there are no light interferences ...
