The Telescope Revolution

Tycho Brahe

He constructed a large observatory on the island of Hveen, from which he conducts observations for the next 20 years.

1576

Tycho Brahe constructed a large observatory on the island of Hveen, from which he conducts observations for the next 20 years.

Giordano Bruno,

He is burned at the stake as a heretic after expressing his belief that the sun and Earth are not central or unique in the universe.

1600

Giordano Bruno, an Italian friar, is burned at the stake as a heretic after expressing his belief that the sun and Earth are not central or unique in the universe.

Hans Lippershey

_______, a Dutch eyeglass manufacturer, seeks a patent for a three-times magnification telescope.

1608

Hans Lippershey, a Dutch eyeglass manufacturer, seeks a patent for a three-times magnification telescope.

33

Galileo Galilei discovered four moons orbiting Jupiter using a telescope magnified _____ times.

1610

Galileo Galilei discovered four moons orbiting Jupiter using a telescope magnified 33 times.

1619

The three laws of planetary motion proposed by Johannes Kepler describe the elliptical orbits of planets.

Jeremiah Horrocks

an English astronomer, watches Venus pass across the face of the sun.

1639

Jeremiah Horrocks, an English astronomer, watches Venus pass across the face of the sun.

Christiaan Huygens

a Dutch astronomer, was the first to accurately describe the structure of Saturn's rings.

1659

Christiaan Huygens, a Dutch astronomer, was the first to accurately describe the structure of Saturn's rings.

1675

Giovanni Domenico Cassini correctly deduces that Saturn's rings are not solid after spotting a gap in them.

Giovanni Domenico Cassini

________ correctly deduces that Saturn's rings are not solid after spotting a gap in them.

Dane Ole Rmer

He observes the eclipses of Jupiter's moon Io to determine the speed of light.

1676

Dane Ole Rmer observes the eclipses of Jupiter's moon Io to determine the speed of light.

1687

In his book *Principia*, Isaac Newton outlines his general law of gravitation.

1705

Edmond Halley, an English astronomer, forecasts the return of the comet that bears his name.

1725

James Bradley demonstrates that the Earth is moving by demonstrating a phenomenon known as stellar aberration.

stellar aberration

James Bradley demonstrates that the Earth is moving by demonstrating a phenomenon known as ____.

Johannes Kepler

After Tycho Brahe passed away, his assistant ______received the records of his observations. Kepler was persuaded by Copernicus's justifications that the planets orbit the sun.

*gravitas*

weight; where the name **gravity** came from.

aerial

or instance, Giovanni Domenico Cassini observed Saturn in the 1670s using long "______" telescopes without a tube.

1668

In _____, Newton designed and built the first working version of a reflecting telescope that did not have the color problem.

John Hadley

In the 18th century, reflecting telescopes of Newton's design were widely used after _________ developed techniques for fabricating sizable, precisely curved mirrors from shiny speculum metal.

James Bradley

Oxford professor, astronomer, and later Astronomer Royal, was impressed with telescopes and acquired a reflector.

Chester Moore Hall

In the early 18th century, ___, an English inventor, created a two-part lens that significantly reduced color distortion.

John Dollond

an optician, used this discovery to create significantly better refracting telescopes.