Radio telescopes, invented in the 1930s, and the discoveries they made have revolutionised astronomy, and thanks to space technology, we now have access to the whole electromagnetic spectrum, as well as particles from the Sun and other objects. Spacecraft carry telescopes and other astronomical instruments above the Earth's atmosphere, and to other planets in our solar system. Radio telescopes can detect radio objects that are extremely far away and are hard or impossible to see optically. Pulsars, quasars, and radio galaxies were discovered this way. The 'mirror' of a radio telescope is typically a dish of metal or wire mesh.
Some radio telescopes are simply rows of wire antennae in a field.
X-rays can be received by satellites carrying special detectors. These satellites have observed supernovae, and black holes which emit X-rays as they suck in gases from nearby stars. Gamma rays have very high energy, and come from many objects, e.g. galaxies, and pulsars - the remnants of novae. Neutrino detectors placed deep underground can intercept a few of them, and the data used to analyse the Sun and novae. Visible light received by ground telescopes has to pass through the Earth's atmosphere, which filters and distorts it.