Permanent Human Settlement of the Earth, Space and Ocean Frontiers

Saturday, January 19, 2008

MESSENGER at Mercury

Ralph Buttigieg
Sydney, NSW
While the New Horizons spacecraft is still making its way to the frozen realms of Pluto and the Kuiper Belt, NASA's MESSENGER space probe has reached hot Mercury.

The car-sized spacecraft zipped past Mercury in a Monday flyby and is relaying more than 1,200 new images and other data back to eager scientists on Earth.

"Now it's time for the scientific payoff," MESSENGER principal investigator Sean Solomon of the Carnegie Institution of Washington told after the flyby. "It's just a complete mix of results that we're going to get."

In one new image, released today, the planet's stark surface is shown peppered with small craters, each less than a mile (1.6 km) in diameter and carved into an area about 300 miles (482 km) across. MESSENGER used its narrow-angle camera to photograph the scene, which is dominated by a large, double-ringed crater dubbed Vivaldi after the Italian composer. While the crater was last seen by NASA's Mariner 10 probe, MESSENGER's camera observed it with unprecedented detail, researchers said.......

MESSENGER, short for MErcury Surface, Space ENvironment, GEochemistry, and Ranging, trained its seven instruments on Mercury on Monday for the first of three planned flybys to guide itself toward a March 18, 2011, arrival into orbit around the small, rocky planet. The mission is the first to visit Mercury since 1975, when Mariner 10 made its third and final swing past the planet. ......

Being so close the the Sun makes it difficult for Earthbound astronomers to study Mercury. I remember being thought that Mercury had one hemisphere constantly facing the Sun. This was latter discovered to be completely incorrect, Mercury does in fact rotate with a 59 day Sol. Its still a world of mystery its denser then any other planet and there may be ice at the poles. If there is water ice there may be a remote chance of finding some sort of life but I doubt if anyone will ever go sailing with the insect men of Mercury.