Q&A with Marc Rayman, chief engineer on NASA’s Dawn mission (members only)

Approaching the one-year anniversary since its arrival at asteroid Ryugu, Japan’s Hayabusa 2 spacecraft has deployed a target marker near an artificial crater created by an explosive charge in April, a guide post that could help the probe steer toward another pinpoint touchdown to collect a second batch of samples for return to Earth.

If China’s lunar exploration program goes according to plan, scientists could send a robotic lander to pick up samples from the far side of the moon and return them to Earth by the early 2020s, a top Chinese space official said.

A NASA spacecraft set to explore a metallic asteroid for the first time will launch in 2022, a year earlier than originally planned, and reach its destination in 2026, four years ahead of schedule, giving ground teams a shorter wait for the mission’s scientific payoff and shaving $100 million off the project’s total cost, officials said Wednesday.