they use gamma rays... i think. top that peeps!
There are four: Hubble Space Telescope, Compton Gamma Ray Observatory, Chandra X-ray Observatory, and the Spitzer Space Telescope.
Five artificial satellites that are orbiting the earth are ACRIMSAT, HAMSAT, OSCAR 3, PicoSAT and RADARSAT. There are scores of satellites that orbit the Earth for one reason or another.
The Compton Gamma Ray Observatory was launched in 1991 and its cost was approximately $617 million.
Do you mean the Chandra X-ray observatory? Chandra does not operate in the gamma ray wavelengths, it typically can observe light in the "soft" X-ray wavelengths (from about 10 to .10 nm). Gamma rays generally have wavelengths of .001 nm or smaller. Earth's atmosphere actually absorbs most X-rays, so in order to see at that wavelength, a space telescope was needed. Also, X-rays and gamma rays are so energetic that they cannot be gathered by normal means such as a curved optical mirror used in most "optical" telescopes (for visible wavelengths and even some infrared/ultraviolet imaging). X-ray light will pass right through these kinds of mirrors. Chandra uses a series of concentric parabolic mirrors that slightly deflect the paths of x-ray photons towards a detector. Here are some images to compare optical mirrors to Chandra's mirrors. wisconsinastronomy.org/images/scopes/NewtCut_m.jpg spie.org/Images/Graphics/Newsroom/Imported/11_243_0_2006-01-17/11_fig2.jpg Hope this helps.
The Compton Gamma Ray Observatory (CGRO) is a artificial satellite that NASA launched into Earth orbit aboard the space shuttle Atlantis in 1991. The CGRO can be compared to the Hubble Space Telescope and other such space observatories such as the Chandra X-ray observatory. Therefor, no the observatory is not manned but rather controlled by ground personnel. After loosing one of its gyroscopes (used to maintain altitude and orientation) NASA decided that it would be in the best interest for the inhabitants of planet Earth (for safety reasons) to de-orbit the CGRO. On the 4th of June 2000, the CGRO burned up over the Pacific Ocean in a controlled reentry procedure.
The space shuttle Atlantis launched the Magellan and Galileo planetary probes, as well as the Compton Gamma Ray Observatory.
As far as NASA satellites, both SWIFT and GLAST "study gamma rays", just in different ways
The Compton gamma-ray telescope detects high-energy gamma rays, which are a type of electromagnetic radiation with the shortest wavelengths and highest frequencies in the electromagnetic spectrum. These gamma rays are produced by astrophysical processes such as supernovae, pulsars, and black holes.
Seth Digel has written: 'GLAST' -- subject(s): Gamma ray bursts, Space mission, Gamma ray telescopes, Imaging techniques, Gamma ray observatory
One of the 7 types of of light. Gamma-rays have the smallest wavelengths and the most energy of any other wave in the electromagnetic spectrum. These waves are generated by radioactive atoms and in nuclear explosions. Gamma-rays can kill living cells, a fact which medicine uses to its advantage, using gamma-rays to kill cancerous cells. Gamma-rays travel to us across vast distances of the universe, only to be absorbed by the Earth's atmosphere. Different wavelengths of light penetrate the Earth's atmosphere to different depths. Instruments aboard high-altitude balloons and satellites like the Compton Observatory provide our only view of the gamma-ray sky.
The Hubble Space Telescope primarily observes visible and ultraviolet light from objects in space. It is not used to directly measure radiation, such as gamma rays or X-rays. Other telescopes, like the Chandra X-ray Observatory or Fermi Gamma-ray Space Telescope, are specifically designed to detect and analyze high-energy radiation in space.
Hubble Space Telescope - it has been operational since 1990 and has provided numerous groundbreaking discoveries in astronomy. Chandra X-ray Observatory - it has been studying the universe in X-ray wavelengths since 1999, helping to uncover high-energy phenomena. Fermi Gamma-ray Space Telescope - launched in 2008, it observes the universe in gamma-ray wavelengths, enabling the study of extreme astrophysical processes.