The Cosmic Background Explorer (COBE) was launched in 1990 and was the first space observatory designed to study the cosmic microwave background radiation, the remnant radiation from the Big Bang.

The Chandra X-ray Observatory (CXO) was launched in 1999 and is designed to study X-ray emissions from celestial objects, such as black holes, neutron stars, and supernova remnants.

The Compton Gamma Ray Observatory (CGRO) was launched in 1991 and was designed to study gamma ray emissions from celestial objects, such as pulsars, blazars, and supernova remnants.

The Spitzer Space Telescope (SST) was launched in 2003 and is designed to study infrared emissions from celestial objects, such as star-forming regions, galaxies, and planets.

The Hubble Space Telescope (HST) was launched in 1990 and is designed to study ultraviolet and visible light emissions from celestial objects, such as stars, galaxies, and planets.

The James Webb Space Telescope (JWST) was launched in 2021 and is designed to study the polarization of light from celestial objects, such as stars, galaxies, and planets.

The Athena X-ray Observatory (AXO) is scheduled to be launched in 2027 and is designed to study X-ray emissions from celestial objects, such as black holes, neutron stars, and supernova remnants.

The Nancy Grace Roman Space Telescope (RST) is scheduled to be launched in 2027 and is designed to study infrared emissions from celestial objects, such as star-forming regions, galaxies, and planets.

The LUVOIR Space Telescope (LST) is scheduled to be launched in 2039 and is designed to study ultraviolet and visible light emissions from celestial objects, such as stars, galaxies, and planets.

The Origins Space Telescope (OST) is scheduled to be launched in 2045 and is designed to study the polarization of light from celestial objects, such as stars, galaxies, and planets.

The Lynx X-ray Observatory (LXO) is scheduled to be launched in 2050 and is designed to study X-ray emissions from celestial objects, such as black holes, neutron stars, and supernova remnants.

The HabEx Space Telescope (HST) is scheduled to be launched in 2055 and is designed to study infrared emissions from celestial objects, such as star-forming regions, galaxies, and planets.

The Starshade Space Telescope (SST) is scheduled to be launched in 2060 and is designed to study ultraviolet and visible light emissions from celestial objects, such as stars, galaxies, and planets.

The Origins Space Telescope (OST) is scheduled to be launched in 2065 and is designed to study the polarization of light from celestial objects, such as stars, galaxies, and planets.