NASA engineers have shut down another instrument on Voyager 1 to preserve the power of the most distant spacecraft ever sent into space.
Liquid water is the primary ingredient for life as far as we can determine. The search for habitable exoplanets focuses on this fact. Exoplanet scientists sift through data trying to determine which worlds might be in their stars' habitable zones, a zone with just the right amount of star energy to maintain liquid surface water.

