The CGRO, launched in 1991 and now decommissioned, detected high-energy, violent spectacles in the 30 kiloelectron volts (keV) to 30 gigaelectron volts (GeV) spectrum, including the energy-spewing nuclei of active galaxies.Appropriately named for Edwin Hubble, the astronomer who discovered many of the events that it was built to investigate, the telescope has since become one of the most productive instruments in scientific history, bringing phenomena like star birth and death, galactic evolution and black holes from theory to observed fact.

The school-bus-sized Hubble, which sees primarily in the visible spectrum with some ultraviolet and near-infrared coverage, kicked off the program in 1990 and, with further servicing, will complement and work with Webb.

The four overlapping missions have enabled scientists to observe the same astronomical objects in the visible, gamma ray, X-ray and infrared spectra. Webb's mission builds upon and expands the work of NASA's Great Observatories, four remarkable space telescopes whose instruments cover the waterfront of electromagnetic spectra. The Hubble Heritage Team (STScI/AURA), and J. The James Webb Telescope will focus on infrared imaging. This image shows the difference between Hubble's visible and infrared views of the Monkey Head Nebula. It also will take astronomers closer than ever to the beginning of time, granting glimpses of sights long hypothesized but never before seen, from the birth of galaxies to light from the very first stars. 22, 2021, launch date from Europe's Spaceport in Kourou, French Guiana, Webb was built by an international collaboration between NASA, the European Space Agency (ESA) and the Canadian Space Agency (CSA), and is charged with answering some very ambitious questions. Now, the James Webb Space Telescope stands poised to place its back to the sunlight, step away from Earth and make the keen, delicate observations possible only in the cold, dark spaces beyond the moon. More than three decades of the Earth-orbiting Hubble Space Telescope helped pierce the veil of time, photograph stellar nurseries and prove that galaxies collide. Before the Kepler Space Telescope, we thought exoplanets were rare in the universe now we suspect they might outnumber stars. In the mid-20th century, radio telescopes showed that galaxies - far from static blobs - were in fact active and bursting with energy. Around 400 years ago, the telescope revealed unsuspected moons, planets and sunspots, sparking a succession of new cosmic theories and better tools to test them, revealing billowing nebulae and congregating stars along the way.

James webb space telescope