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| | ipedia.com: History of astronomy Article (Site not responding. Last check: 2007-10-20) |
 | | Cosmology, a discipline that has a large intersection with astronomy, made huge advances during the 20th century, with the model of the hot big bang heavily supported by the evidence provided by astronomy and physics, such as the cosmic microwave background radiation, Hubble's law and cosmological abundances of elements. |
 | | Late in the 19th century, scientists began discovering forms of light which were insible to the naked eye: X-Rays, gamma rays, radio waves, microwaves, ultraviolet radiation, and infrared radiation. |
 | | Stars were found much later to be far away objects, and with the advent of spectroscopy it was proved that they were similar to our own sun, but with a range of temperatures, masses and sizes. |
| www.ipedia.com /history_of_astronomy_1.html (2126 words) |
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