The optical telescope has been the backbone of astronomy since it’s invention in the early 17th century. It helped to settle an old argument of whether the Earth or the Sun was at the centre of the Universe. Since then we have learned that the Universe has no centre. The Sun is but one out of a billion stars in a galaxy called the Milky Way. However, it has turned out to be a pretty exciting place.
In 1923, a junior astronomer named Edwin Hubble discovered another galaxy, which is now called Andromeda. From his observations, he learned that the stars in this galaxy were much further away than any other star in the Milky Way. He also realized that the Universe is expanding. Using modern telescopes, we have observed light from the most distant galaxies. This light has travelled about 13 billion years to reach us here on Earth.
We need a big telescope to observe the furthest parts of the Universe. One of the biggest telescopes in the world is the Very Large Telescope in Chile, South America. It actually consists of four individual telescopes. Each one has a main mirror of 8.2 meters in diameter.
Technological advancements have helped us to create these large telescopes. However, it’s still the same basic physical principles that are used to design telescopes today. In this course, you will learn about these principles and how they can be applied to design your own telescope.
- Geometric optics.
- Snell’s law.
This is our prototype course. So if you spot any bugs or issues please let us know.