الوضع الليلي
7:41:41 
2018-10-22 
1486
European and Japanese space agencies said an Ariane 5 rocket successfully lifted a spacecraft carrying two probes into orbit Saturday for a joint mission to Mercury, the closest planet to the sun.
The European Space Agency and the Japan Aerospace Exploration Agency said the unmanned BepiColombo spacecraft successfully separated and was sent into orbit from French Guiana as planned to begin a seven-year journey to Mercury.
They said the spacecraft, named after Italian scientist Giuseppe "Bepi" Colombo, was in the right orbit and has sent the first signal after the liftoff.
ESA says the EUR 1.3 billion ($1.5 billion) mission is one of the most challenging in its history. Mercury's extreme temperatures, the intense gravity pull of the sun and blistering solar radiation make for hellish conditions.
The BepiColombo spacecraft will have to follow an elliptical path that involves a fly-by of Earth, two of Venus and six of Mercury itself so it can slow down before arriving at its destination in December 2025.
When it arrives, BepiColombo will release two probes - Bepi and Mio - that will independently investigate the surface and magnetic field of Mercury. The probes are designed to cope with temperatures varying from 430 degrees Celsius (806 F) on the side facing the sun, and -180 degrees Celsius (-292 F) in Mercury's shadow.
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