Did this satellite streak past the Hubble Space Telescope so close that it was out of focus? If so, how close was it?
Why does a mirror bent 'like a potato chip' allow space telescopes to be smaller and have a wider field of view?
Is it possible to block the surrounding light in a solar eclipse if we made the moon bigger or closer to the earth?
How does making a refracting telescope very long reduce the chromatic aberration of an uncorrected lens?
Why does one object (star?) in this JWST image have two sets of six+plus+two diffraction spikes but another, similar object nearby have only one?
Have there been studies of "old photons" to see just how constant things like Planck constant has been?
What is it about the layout of the three gratings in a Bahtinov mask that makes its indicate focus in this way?
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