Apollo 11. Mission to land on the moon. On 20th July 1969.
The Hubble space telescope. A space telescope. Has helped a lot with space exploration.
The most important differences between a transmission electron microscope and a scanning electron microscope are: Rather than the broad static beam used in TEM, the SEM beam is focused to a fine point and scans line by line over the sample surface in a rectangular raster pattern
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(jacemorris04)
I would select B or C as the answer because i have no idea what the other ones are :)