* A new powerful satellite will constantly scan the sky for gamma rays – energy from power gamma ray bursters, which are some of the most mysterious objects in space. A consortium of 6 nations has built the satellite: France, Italy, Japan, Germany, Sweden and US. The satellite will scan the entire sky every 3 hours. It orbits the earth at an altitude of 530 km.
* The gamma ray tracker contains 16 towers of silicon and lead sheets.
* Incoming gamma ray strikes top of tower, converts into one electron and one positron.
* Electron and positron trigger sensors that determine precisely where in sky the ray came from.
* Lower stack of cesium-iodide sensors determines the ray’s energy.
* Satellite then transmits data to scientists on earth.
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