The window of universe — Various types of Telescope

NGC 6357 under X-ray telescope by NASA. Image from Gizmodo

The science of astronomy is about the telescopes. Without them, our naked eyes can only see thousands of stars in the night sky away from city lights. We get to see galaxies, stars, nebulas and other celestial objects that are light years away from us through telescopes. Furthermore, as the technology improved over the last century, we developed various kinds of telescopes beside optical telescope. Here is some short description about them:

It is a kind of telescope to detect high energy gamma ray photons in the universe range of 50 GeV to 50 TeV. They are usually not in the space but on the Earth.

Infrared image from NASA’s Spitzer Space telescope. Image from Space

All celestial objects with a temperature above absolute zero emit some form of electromagnetic radiation. Astronomers use infrared telescope to detect celestial objects.

Radio telescopes are used to receive electromagnetic radiations from stars in the radio wave range. They are usually huge parabolic antennas. Radio telescope is essential to radio astronomy study.

Parkes CSIRO radio telescope. Image from wikipedia
  • Ultraviolet telescope, X-ray telescope and Submillimeter telescope

These are just other kinds of telescopes that astronomers used to detect electromagnetic waves in ultraviolet range, X-ray range and Submillimeter range edited by celestial objects in the universe

These various kinds of telescope allow us to picture and study universe in different perspective and enable us to see much more stuff than optical telescope can. Our development in astronomy is all based on these telescopes and that’s why people are saying the astronomy is the science of telescope.