Results tagged “Mercury”

The MESSENGER spacecraft has completed 1,000 Earth days of flight operations in orbit around Mercury.

Craters in the Caloris Basin on Mercury

This image features several craters near the eastern edge of the Caloris basin. The larger craters have excavated low reflectance material, and both have hollows forming within their floors.

Planetary scientists are announcing today a new explanation of the current rotational state of the planet Mercury. The report is being presented by Dr. Benoit Noyelles of the University of Namur, Belgium, to the meeting of the Division for Planetary Sciences of the American Astronomical Society, held in Denver, CO.

Mercury - Peaking into the Dark

In this dramatic scene, an unnamed crater in Mercury's northern volcanic plains is bathed in darkness as the sun sits low on the horizon.

MESSENGER began its 2,000th orbit around Mercury earlier this week, on May 22. The spacecraft completed its primary mission on March 17, 2012, and its first extended mission on March 17, 2013.

The planetary perturbations on Mercury's orbit lead to long-period forced librations of Mercury's mantle. These librations have previously been studied for a planet with two layers: a mantle and a liquid core.

Radar Exposes Mercury's Interior

Researchers working with high-precision planetary radars, including the Goldstone Solar System Radar of NASA's Jet Propulsion Laboratory, Pasadena, Calif., have discovered strong evidence that the planet Mercury has a molten core

The Sun Sends Two CMEs Toward Mercury

On the night of April 24 and the morning of April 25, 2013, the sun erupted with two coronal mass ejections (CMEs), solar phenomena that can send billions of tons of solar particles into space that can affect electronic systems in satellites.

First Meteorite From Mercury Found?

Early in 2012, someone in Southern Morocco picked up 35 greenish stones, including the one shown above. Purchased by a dealer in Erfoud, Morocco, it was then resold to Stefan Ralew, a meteorite collector from Berlin.

Newly Named Craters on Mercury

The International Astronomical Union (IAU) - the arbiter of planetary and satellite nomenclature since its inception in 1919 - recently approved a proposal from the MESSENGER Science Team to assign names to nine impact craters on Mercury. In keeping with the established naming theme for craters on Mercury, all of the newly designated features are named after famous deceased artists, musicians, or authors or other contributors to the humanities.

NASA's MESSENGER spacecraft has identified large concentrations of hydrogen at Mercury's north pole, thought to be in the form of water ice, researchers announced today.

MESSENGER has discovered assemblages of tectonic landforms unlike any previously found on Mercury or elsewhere in the Solar System.

MESSENGER completed its 1,000th orbit of the planet closest to the Sun at 11:22 p.m. EDT on 22 June 2012. "Reaching this milestone is yet another testimony to the hard work and dedication of the full MESSENGER team that has designed, launched, and operated this highly successful spacecraft," says the mission trajectory lead Jim McAdams of the Johns Hopkins University Applied Physics Laboratory in Laurel, Md.

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