Tycho Brahe's Observations
It is important to remember that Tycho Brahe lived before the invention
of the telescope. Astronomical observation were made by the naked eye.
Galilei invents the telescope 9 years after Tycho Brahe's death.
The devices Tycho Brahe used and constructed are therefore
mainly devices for measuring angles and positions.
Also clocks were very limited at that time, the pendulum clock was not
invented either, so to measure time, Tycho usually chose to use the
movements of the stars and planets, with admirably accurate results.
In the evening of the 11th of November 1572, Tycho Brahe for the first
time sees a new star in the constellation Cassiopeia.
Tycho Brahe observes it carefully, and
publishes his findings about the "new star", Stella Nova in latin,
and becomes known as a respected astronomer.
Drawing of Cassipeia, with the position of the stars. "Nova Stella",
the brightest is marked as "I".
Two of Tycho Brahe's instruments.