HOW TELESCOPES WORK
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HOW TELESCOPES WORK
Telescopes in by-gone days. Refracting telescopes. Reflecting telescopes. Large telescopes. The job of modern-day telescopes. The Milky Way, black holes and the beginnings of the Universe. Summary.
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INTRODUCTION
- From ancient times, scientists have attempted to understand the shape and behaviour of the Universe.
- The telescope
- The light coming from Universe
REFRACTORY TELESCOPES
- Galileo Galilei: the first telescope ever used for scientific purposes
- The Refractory quality of light
- How does a telescope using refractory light work?
- The inconvenience of refractory telescopes is that they alter the colours of objects. Chromatic aberration.
REFLECTING TELESCOPES
- Light has the capacity of reflecting itself on certain surfaces.
- Isaac Newton: the reflecting telescope.
- How does a reflecting telescope work?
- The Gregory and Cassegrain telescopes.
- The Herschel telescope
LARGE TELESCOPES
- Almost all the investigations are carried out photographically and by using powerful computers.
- Telescopes are generally constructed in high areas, above the denser atmospheric layers.
- Different studies. The Sun and its characteristics. The planets of the solar system. Other galaxies and their movements. The centre of the Milky Way. Black holes
- The Hubble space telescope.
SUMMARY |
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