At issue was theorized 100 years ago by the, famous physicist Albert Einstein
Paris, France. | AFP.
Europe launched on Wednesday from French Guiana a satellite, the Lisa Pathfinder, called to pave the way for a future space observatory able to detect famous gravitational waves theorized by Albert Einstein 100 years ago.
The famous physicist hundred years ago established that under the effect of gravity, matter in motion distorts space and time, creating waves that move in space, as do the circles caused by the fall of a stone in the water surface.
Currently, several observatories primarily in the United States and Italy are actively seeking direct evidence of the existence of these extremely faint gravitational waves, propagating at the speed of light.
“ Having an observatory in space allow you to see the large displacements of mass in the Universe and very violent events, such as a collision of galaxies or the merger of two black holes “, told AFP the French physicist Pierre Binetruy of University Paris Diderot. “We hope to reconstruct the history of the Universe and traced to very primordial events” that followed the Big Bang, adds the professor involved in the project of the future European Observatory.
Named Lisa, the observatory could be released by 2030 if the satellite LISA Pathfinder mission accomplished. As its name implies, is a “browser”.
This will test the technologies and tools of the three satellites Lisa, distant among them a million kilometers and form a triangle.
“ will be sent laser to measure the distance between them. If there is a small periodic variation, will be tested over a gravitational wave “, explains Binetruy. The European launcher Vega sent into space Lisa Pathfinder, built by Airbus Defense & amp; Space within the framework of a project of the European Space Agency (ESA). Its launch is scheduled on Wednesday at the local 01H15 (04H15 GMT) from the Guiana Space Center in Kourou.
After 1 hour and 45 minute flight, Lisa Pathfinder will separate from Vega, beginning a long journey that will take in late January to operational 1.5 million km from Earth orbit.
Equipped fixed solar panels, its scientific module comprises a laser capable of measuring changes in distance between two bodies floating freely, they separated 38 centimeters between them. ESA disbursed “about 430 million euros” for this ambitious mission that began in 2004, according to Garcia. The participating countries are Germany, Spain, France, Britain, Holland, Italy and Switzerland.
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