How did Brahe measure highly accurate planetary positions?
A) By careful measurements of the brightness of the planets, as seen from Earth.
B) With larger and more elegant sighting instruments.
C) By his invention of the technique know as triangulation (measuring the distance between 2 points, and measuring 2 angles, to determine the distance to a 3rd point).
D) With the recently-invented telescope.
E) With a new type of telescope that used mirrors instead of lenses.
B
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The ________ is the totality of all space, time, matter, and energy
Fill in the blank(s) with correct word
Why did Ptolemy have the planets orbiting Earth on "circles upon circles" in his model of the universe?
What will be an ideal response?
Suppose two flat glass plates 30-cm long are in contact along one end and separated by a human hair at the other end. If the diameter of the hair is 50 mm, find the separation of the interference fringes when the plates are illuminated by green light, l = 546 nm
The most significant difference between the astronomical theories of Ptolemy and Copernicus is
A) Ptolemy's is not based on scientific evidence, while Copernicus's is. B) Ptolemy's theory does away with many of the complexities of the Copernican theory. C) Ptolemy's theory is sun-centered, whereas Copernicus's is Earth-centered. D) Ptolemy uses circular planetary orbits while Copernicus uses elliptical orbits. E) Ptolemy's theory is Earth-centered, whereas Copernicus's is sun-centered.