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Sep30-08, 08:56 AM
I saw part of a documentary about the keck telescope, they used an instrument that vibrated if any thing came near it to align the mirror segments, this instrument has fantastic accuracy apparently, can any one tell me what it is called please.
Step lightly: All-optical transistor triggered by single photon promises advances in quantum applications
The unifying framework of symmetry reveals properties of a broad range of physical systems
What time is it in the universe?