Gamma-ray telescopes are specialized instruments designed to detect and study gamma rays, which are the most energetic form of electromagnetic radiation.

The Hubble Space Telescope (HST) is not a gamma-ray telescope. It is an optical and ultraviolet space telescope designed to study objects in visible and ultraviolet light.

The Compton Gamma-Ray Observatory (CGRO) was the first gamma-ray telescope launched into space. It was operational from 1991 to 2000 and made significant contributions to our understanding of gamma-ray sources and phenomena.

The Swift Gamma-Ray Burst Mission is a space telescope specifically designed to detect and study gamma-ray bursts, which are brief, intense flashes of gamma rays.

The primary scientific goal of the Fermi Gamma-ray Space Telescope is to study the origin of cosmic rays, which are high-energy particles that originate from outside our solar system.

The INTEGRAL Gamma-Ray Observatory is known for its wide field of view and ability to survey large areas of the sky, making it suitable for studying diffuse gamma-ray emission and large-scale structures.

The High-Energy Stereoscopic System (H.E.S.S.) is a ground-based gamma-ray telescope that was launched in 2018. It is designed to study the most energetic gamma rays, known as very high-energy gamma rays.

Ground-based gamma-ray telescopes have a wider field of view compared to space-based telescopes, allowing them to survey larger areas of the sky.

The Very Energetic Radiation Imaging Telescope Array System (VERITAS) is a ground-based gamma-ray telescope known for its ability to detect gamma rays with energies above 100 TeV.

The James Webb Space Telescope (JWST) is a space telescope launched in 2019. While it is not specifically a gamma-ray telescope, it has the capability to detect gamma rays in addition to other wavelengths of light, allowing it to study the early universe.

The Neutron Star Interior Composition Explorer (NICER) is a space telescope launched in 2017. It is known for its ability to detect and study gamma-ray pulsars, which are neutron stars that emit gamma rays.

The primary scientific goal of the Cherenkov Telescope Array (CTA) is to study the origin of cosmic rays, which are high-energy particles that originate from outside our solar system.

The Solar Dynamics Observatory (SDO) is a space telescope launched in 2010. While it is not specifically a gamma-ray telescope, it has the capability to detect gamma rays from solar flares, providing valuable insights into solar activity.

AstroSat is a space telescope launched in 2017 by the Indian Space Research Organisation (ISRO). It is known for its ability to study gamma-ray bursts and other transient phenomena.

The Gamma-Ray Spectrometer (GRS) is a gamma-ray telescope known for its ability to detect and study gamma-ray lines, which are narrow features in the gamma-ray spectrum that provide valuable information about the composition and properties of cosmic sources.