Mercury Densest Planet

Spacecraft Maryland-built Messenger who is on its mission of Mercury Planet has amazed the scientists with his explorations and now, they are bound to think on their previous classic theories about the evolution and origin of Planet Mercury.
In their latest discussion about the Mercury’s Scientific Mission scientists said that they have found the evidences of volcanic activities including explosive eruptions which was unexpectedly continued some one billion year ago. These evidences have been found through recent photos of a Volcanic Crater by Spacecraft. Crater is 180 miles wide and contains a double ring around it. Crater has a smooth interior and free of subsequent meteor impact craters which shows that there were Lawa flowing into the center some one billion years ago.
Previously, they were believed that mercury volcanism was ceased some 3 billion years ago. Another thing is that neutron spectroscopy has showed higher concentrations of iron and titanium on the surface than had been thought.

“Models of Mercury’s formation and evolution will have to be reassessed to account for a large iron and titanium content. … It will keep people busy for a while trying to understand this,” said David J. Lawrence, a scientist with the mission from the Johns Hopkins Applied Physics Laboratory near Laurel.

Previous observations are claiming mercury, the densest planet of solar system with a large iron core. However, surface measurement is showing rich rocky silicates surface which is poor in iron.
Messenger Spacecraft was built in $446 Million Dollors and is managed through a control center. It was launched in august 2004 and on its way to enter in mercury’s orbit and hopefully, it will till March 2011.