Unprecedented Scrutiny of Mercury Drawing to a Dramatic Close

HOUSTON—NASA’s long-running Messenger spacecraft orbiting Mercury used the last of its hydrazine propellant this week in a bid to carry out a low-altitude, monthlong final mission extension to study polar ice deposits and other surface features that distinguish the planet closest to the Sun. With...
Mark Carreau

Mark is based in Houston, where he has written on aerospace for more than 25 years. While at the Houston Chronicle, he was recognized by the Rotary National Award for Space Achievement Foundation in 2006 for his professional contributions to the public understanding of America's space program through news reporting.

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