Europe’s BepiColombo mission has achieved a significant milestone during the final leg of its eight-year interplanetary journey to Mercury. The robotic science probe, commissioned by the European Space Agency with contributions from Japan and the United States, is now positioned for its final approach to the Solar System’s innermost planet.
Launched in 2018, the nearly $2 billion mission has utilized a complex trajectory involving plasma propulsion and multiple gravitational slingshots around Earth, Venus, and Mercury. These maneuvers have progressively reduced the spacecraft’s velocity, steering it toward a historic orbital capture encounter later this year.
When BepiColombo next reaches Mercury, its speed will be precisely calibrated for the planet’s gravity to capture it into orbit. The mission highlights the immense energy requirements, or delta-v, needed to reach and orbit Mercury compared to other deep-space destinations. For context, NASA’s New Horizons probe took approximately a decade to travel from Earth to Pluto, yet traveling to Mercury’s orbit demands even greater propulsive effort due to the need to counteract the Sun’s intense gravitational pull.
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