Europe and Japan prepare spacecraft for seven-year journey to Mercury
Japan Times -- Oct 20
Final preparations were under way Friday for the launch of a joint mission by European and Japanese space agencies to send twin probes to Mercury, the closest planet to the sun.

An Ariane 5 rocket is scheduled to lift the BepiColombo spacecraft into orbit from French Guiana late Friday, after which it will begin its seven-year journey to the solar system’s innermost planet.

The European Space Agency says the €1.3 billion ($1.5 billion) BepiColombo 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 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 sufficiently before arriving at its destination in December 2025.

Newly developed electrical ion thrusters will help nudge the spacecraft, which is named after Italian scientist Giuseppe ‘Bepi’ Colombo, into the right orbit.

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 equipped with special insulation to cope with temperatures varying from 430 degrees Celsius (806 Fahrenheit) on the side facing the sun, and minus 180 degrees Celsius (minus 292 Fahrenheit) in Mercury’s shadow.

News source: Japan Times
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