New Windows Into The Cosmos Open
In the 19th century, scientists began discovering forms of light which were invisible to the naked eye: X-Rays, gamma rays, radio waves, microwaves, ultraviolet radiation, and infrared radiation. This had a major impact on astronomy, spawning the fields of infrared astronomy, radio astronomy, x-ray astronomy and finally gamma-ray astronomy. With the advent of spectroscopy it was proven that other stars were similar to our own sun, but with a range of temperatures, masses and sizes. The existence of our galaxy, the Milky Way, as a separate group of stars was only proven in the 20th century, along with the existence of "external" galaxies, and soon after, the expansion of the universe seen in the recession of most galaxies from us.
Read more about this topic: History Of Astronomy
Famous quotes containing the words windows, cosmos and/or open:
““Try speaking. Say ‘Hello!’”
“Hello. Hello.”
“What do you hear?”
“I hear an empty room—
You know it sounds that way. And yes, I hear
I think I hear a clock and windows rattling....””
—Robert Frost (1874–1963)
“The cosmos is about the smallest hole that a man can hide his head in.”
—Gilbert Keith Chesterton (1874–1936)
“Betray, kind husband, Thy spouse to our sights,
And let mine amorous soul court Thy mild Dove,
Who is most true and pleasing to Thee then
When she is embraced and open to most men.”
—John Donne (1572–1631)