What classification did the IAU give Pluto in 2006?
Answer
Dwarf planet
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Which dwarf planet was formerly counted as the ninth planet from the Sun?
Answer
Pluto
Which planet is second from the Sun in the modern heliocentric order?
Answer
Venus
Which mathematical device from Islamic astronomy appears in Copernicus's lunar model?
Answer
Tusi couple
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Latest trivia questions
In what year did Nicolaus Copernicus die?
Answer
1543
Which named principle says Earth is not in a specially favored central position?
Answer
Copernican principle
Which 1728 discovery by James Bradley gave direct evidence for Earth's motion around the Sun?
Answer
Aberration of light
Which Newton work gave a mathematical basis for Kepler's laws and heliocentric dynamics?
Answer
Principia Mathematica
Which 1619 Kepler book presented his third law of planetary motion?
Answer
Harmonices Mundi
Which geoheliocentric model had the Sun orbit Earth while other planets orbited the Sun?
Answer
Tychonic system