Introduction to Astrophysics
Instructor-
Golam Dastegir Al-Quaderi
Professor
Department of Physics, DU
1
, Kepler’s Law
• Tycho Brahe (1546–1601) was one of the
foremost naked-eye observer who worked at
the observatory at Uraniborg, on the island of
Hven.
• His observations were so meticulous that he
was able to measure the position of an object
in the heavens to an accuracy of better than
4′ (approximately one-eighth the angular
diameter of the full moon).
2
, Kepler’s Law
• The most important astronomical contributions
of Tycho Brahe were:
• A. He demonstrated for the first time that
comets must be much farther away than the
Moon, rather than being some form of
atmospheric phenomenon.
• B. He observed the supernova of 1572, which
clearly demonstrated that the heavens were
not unchanging as Church doctrine held.
3
, Kepler’s Law
• Tycho Brahe and the Uraniborg:
https://en.wikipedia.org/wiki/Tycho_Brahe 4
Instructor-
Golam Dastegir Al-Quaderi
Professor
Department of Physics, DU
1
, Kepler’s Law
• Tycho Brahe (1546–1601) was one of the
foremost naked-eye observer who worked at
the observatory at Uraniborg, on the island of
Hven.
• His observations were so meticulous that he
was able to measure the position of an object
in the heavens to an accuracy of better than
4′ (approximately one-eighth the angular
diameter of the full moon).
2
, Kepler’s Law
• The most important astronomical contributions
of Tycho Brahe were:
• A. He demonstrated for the first time that
comets must be much farther away than the
Moon, rather than being some form of
atmospheric phenomenon.
• B. He observed the supernova of 1572, which
clearly demonstrated that the heavens were
not unchanging as Church doctrine held.
3
, Kepler’s Law
• Tycho Brahe and the Uraniborg:
https://en.wikipedia.org/wiki/Tycho_Brahe 4
