What is happening to produce this much energy? What happens to the surrounding environment near these phenomena? How will studying these energetic objects add to our understanding of the very nature of the Universe and how it behaves?
With Fermi, astronomers at long last have a superior tool to study how black holes, notorious for pulling matter in, can accelerate jets of gas outward at fantastic speeds. Physicists are able to study subatomic particles at energies far greater than those seen in ground-based particle accelerators.
And cosmologists are gaining valuable information about the birth and early evolution of the Universe. The Fermi Gamma-Ray Telescope is a space observatory designed to study the universe in highly energetic frequencies known as gamma-rays.
Department of Energy, and several partners both in the United States and internationally. The mission was launched in and remained operational as of mid In , the National Academies of Sciences' Decadal Survey, which identifies the scientific community's top priorities for research in the coming years, a mission studying energetic gamma-rays was the top priority for a mid-sized project , according to NASA.
NASA said that Fermi's field of view and sky survey capabilities were twice as large as one of Compton's instruments, and 30 times as sensitive. Fermi was also designed as a complement to the Neil Gehrels Swift Observatory; Swift is optimized to look at the locations of gamma-ray bursts, as well as their afterglows.
Department of Energy. International partners from France, Germany, Italy, Japan and Sweden also contributed, as well as other institutions in the United States. It was placed into a circular orbit around Earth with an altitude of about miles kilometers. It circles the planet every 90 minutes.
Fermi was designed to last five to 10 years. The mission passed its 10th anniversary in June and was still operational as of mid, although it is expected to end operations in fall Fermi is designed to examine gamma-ray radiation, the most energetic form of light that there is. Like the visible light that humans can see, gamma-rays are on the spectrum of electromagnetic radiation. Gamma-rays, however, have billions of times more energy than visible light. In gamma-rays, several types of exotic objects shine brightly.
Researchers have seen gamma-ray bursts, which are the most energetic types of explosions in the universe and may have caused a large extinction on Earth.
Solar flares — eruptions from our sun — are bright both in visible light and in gamma-rays. Rapidly rotating and ultra-dense stars known as pulsars are also sources of gamma-rays. Researchers also want to examine gamma-rays to better understand a substance known as dark matter.
Initially, scientists thought that "excess" gamma-rays might be a signal of dark matter, but later research put this hypothesis into doubt.
Fermi was launched on 11 June ; the satellite is named after the Italian nuclear physicist and Nobel laureate Enrico Fermi Gamma radiation, the range in the electromagnetic spectrum with the shortest wavelength, is so energetic that it would pass through a lens or a mirror straightaway, and therefore cannot be observed with conventional optical telescopes. When a gamma ray reaches the telescope, it impacts on a metal foil producing a pair of charged particles which continue to fly through the detector.
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