missions

SummaryThe European Space Agency (ESA) last week revealed the science themes it wants to pursue in billion-euro missions to be launched between 2035 and 2050. They include taking a close look at ocean-bearing moons around Jupiter and…

SummaryWhen NASA announced it would spend $1 billion developing two new missions to Venus—the agency's first visits in decades to Earth's hothouse twin—planetary scientists were elated, and not just because a long wait had ended. A dramatic…