April 7, 1991: Compton Gamma Ray Observatory is deployed

<p>NASA’s Great Observatories – the Hubble Space Telescope, the Compton Gamma Ray Observatory (CGRO), the Chandra X-ray Observatory, and the Spitzer Space Telescope – were launched between 1990 and 2003, each intended to observe the universe in a different wavelength. Hubble, launched in 1990 and still operational today, observes primarily in visible light and near-ultraviolet.<a class="more-link" href="https://www.astronomy.com/today-in-the-history-of-astronomy/april-7-1991-compton-gamma-ray-observatory-is-deployed/">Continue reading <span class="screen-reader-text">"April 7, 1991: Compton Gamma Ray Observatory is deployed"</span></a></p> <p>The post <a href="https://www.astronomy.com/today-in-the-history-of-astronomy/april-7-1991-compton-gamma-ray-observatory-is-deployed/">April 7, 1991: Compton Gamma Ray Observatory is deployed</a> appeared first on <a href="https://www.astronomy.com">Astronomy Magazine</a>.</p>