Two Spacecraft are set to leap Venus within hours of each other this week, using the procedure to do a little bit of bonus science on the way to their main missions at the center of our solar system. The European Space Agency’s Solar Orbiter probe, in cooperation with NASA, will swing around Venus early Monday, using the planet’s gravity to help put it on a course to observe the Sun’s poles.
About 33 hours later, the European-Japanese spacecraft BepiColombo will get even closer to Venus in a maneuver designed to help it slow down sharply and safely steer into the orbit of Mercury in 2025.
Elsa Montagnon, the spacecraft operations manager for BepiColombo, said that without the flyby, they would not be able to reach our target planet. The energy required to enter into the orbit of Mercury would be prohibitively expensive in terms of propellant. Both probes have numerous scientific instruments on board, some of which will be used to take a closer look at Venus as they zoom past.The measurements will add to those taken by the Japanese probe Akatsuki, which is already in orbit around Earth’s hotter neighbor. NASA and the European Space Agency are planning to send three more missions to toward the end of the decade.
The two Spacecraft need the gravitational swingby to help them lose a little orbital energy to reach their destinations towards the center of the Solar System. The double flyby also offers an unprecedented opportunity to study the Venus environment from different locations at the same time and in locations that are not typically visited by a dedicated planetary orbiter.