invention articles
What was the initial magnification range of early Dutch spectacle-makers' devices?
In what year did Galileo Galilei receive word of the Dutch perspective glass?
What specific observation in the Moon revealed celestial imperfection to Galileo?
What implication did the discovery of Jupiter’s moons have for the geocentric model?
How did Galileo's observation of Venus support the Copernican heliocentric system?
What major characteristic of the Milky Way was revealed by the telescope?
What methodological shift did Galileo’s work establish in astronomy after 1610?
What specific optical feature made early Galilean refractors problematic for faint astronomical objects?
How did the Keplerian Refractor, proposed around 1611, improve upon the Galilean design?
What primary physical constraint inherent in large lenses drove Isaac Newton toward the reflecting telescope around 1668?
Which observer finally demonstrated stellar parallax in 1838, confirming Earth's motion?