I was a bit
worried about driving up to the observatory today, but it turned out to be a short and
not-too-steep drive. Construction on
this observatory began in 1925 and still continues, although a lot of their
telescopes are used for educational purposes, instead of for discovery. The biggest is the Clark telescope, housed
here.
The Pluto
telescope is called that because it is the one used to discover the planet
Pluto. Do you remember reading about how
the researchers used a special machine that flipped negatives of the photos
taken over several weeks period? The
researchers had to look for the one spot of light that “moved” indicating it
was a planet and not a star. They
demonstrated the equipment, except that they had already marked the negatives
with an arrow showing the planet as it jumped from one place to another. Cheating!! The truth is, however, that we would never have noticed that tiny dot of light move without the arrows showing us where it was.
Overall, a very interesting day.
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