It's only a "space mirror" if you get it into space. On the ground for decades, it's a money sponge.
A telescope's sensitivity is directly related to the size of the mirror area that collects light from distant objects. A larger area collects more light, just like a bigger bucket collects more water. Webb has the largest space mirror ever. Learn more: https://jwst.nasa.gov/mirrors.html pic.twitter.com/8Y91a0aBwn
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How about a Time telescope to collect Time. May sound nonsensical now because we consistently fail to disabuse our minds that Time must be transient, discrete. We are all hooked on the primitive notion of "passage of time" Mankind bandage to time ends when Einstein dominance ends
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