All Items Tagged

“NASA Messenger”

Mar 16, 2014 02:00 PM ET // Larry O'Hanlon
An obsolete theory of the Earth works better than ever on Mercury, where new data reveals how much the hot little planet has shriveled since it first formed.
Feb 25, 2013 11:28 AM ET // Markus Hammonds
Data acquired from NASA's MESSENGER probe suggest that Mercury used to have an ocean of molten rock. ->
Mar 22, 2012 05:18 PM ET // Ian O'Neill
Mercury is the closest planet to the sun; it is therefore the least likely place to find a reservoir of water ice. It seems surprising, then, that water ice may be present inside its shady craters.
Sep 29, 2010 08:14 AM ET // Ray Villard
As if the debate over what is and what is not a planet hasn't gotten confusing enough, we are beginning to see a class of object that could be called "Comet-Planets."
Nov 30, 2012 03:38 AM ET // Irene Klotz
A surprising discovery has been made during a successful search for ice inside the small planet's shadowed craters.