Dawn Ceres
NASA's Dawn spacecraft, seen here in orbit around Ceres, will remain there through the rest of its mission, likely to end in the second half of 2018.

Two NASA science missions, one studying the largest objects in the asteroid belt and the other searching for planets around other stars, are expected to come to an end in the coming weeks when each exhausts their remaining hydrazine fuel.

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Jeff Foust has more than a decade of experience writing about space policy, entrepreneurial ventures and regulatory affairs. In 2001, he established spacetoday.net to aggregate and summarize the day's space-related news stories. In 2003, he started The...