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An infrared space telescope launched in 2003 and operated until 2020, part of NASA's Great Observatories.

Twin optical/infrared telescopes located at the Mauna Kea Observatories in Hawaii, each with a 10m primary mirror.

The largest space telescope designed to conduct infrared astronomy, expected to study the earliest galaxies and exoplanets' atmospheres.

A large radio telescope located in Puerto Rico known for its 305m fixed spherical reflector, operational from 1963 until its collapse in 2020.

The Panoramic Survey Telescope and Rapid Response System is a wide-field astronomical imaging and surveying system at Haleakalā Observatory, Hawaii.

A space-based X-ray telescope for high-resolution imaging and study of X-ray emissions from hot regions of the Universe.

A global network of radio telescopes combined to create a virtual Earth-sized telescope, primarily to study supermassive black holes.

A space observatory used to study astronomical objects emitting gamma rays, to probe astrophysical and cosmological phenomena.

A pair of space probes, Voyager 1 and 2, launched in 1977 to study the outer planets and now continue in their extended mission to explore the boundaries of the heliosphere.

The Stratospheric Observatory for Infrared Astronomy is an airborne observatory using a modified Boeing 747SP aircraft to carry a 2.5-meter diameter infrared telescope.

A ground-based optical and infrared telescope located in the Atacama Desert, composed of four individual telescopes that can work together.

The Atacama Large Millimeter/submillimeter Array is an array of radio telescopes in Chile for studying cool cosmic dust and gas.

A wide-field optical survey telescope located at the ESO's Paranal Observatory in Chile, used to map the southern sky.

A space-based observatory launched in 1990 for visible light, ultraviolet, and infrared observations.