Q&A with Michel Denis, ExoMars flight director

The European Space Agency has reserved an Ariane launcher to send a spacecraft toward Jupiter in May 2022, and the mission’s project manager said Tuesday officials could assign the probe to Europe’s new Ariane 6 rocket, assuming the vehicle has a successful debut by the end of 2020.

Arianespace has split its third order of Vega rockets from Italy’s Avio between old and new versions of the solid-fueled booster, as officials prepare to build a final batch of around 18 Ariane 5 rockets before switching to the next-generation Ariane 6 in the early 2020s.

In a rapid-fire crew rotation, a Russian cosmonaut, a NASA astronaut and an Italian flier plan to close out a 139-day mission aboard the International Space Station with a fiery plunge back to the frigid steppe of Kazakhstan aboard their Soyuz MS-05 spacecraft early Thursday.