39th Lunar and Planetary Science Conference

Geosteph and I are leaving this weekend to travel to TX for the 39th Lunar and Planetary Science Conference. It's a week-long conference for international planetary scientists and educators to present their current research and mission results. The conference consists of both talks and poster presentations on a variety of subjects. View the enitre program, which includes links to the abstracts.

On Sunday, Geosteph will help lead a workshop called Reaching the Moon for planetary scientists and educators. Then on Wednesday we'll both lead a workshop for educators called Fire and Ice about the MESSENGER mission to Mercury and the New Horizons mission to Pluto. There may still be slots available for these workshops. Click here to learn more.

On Tuesday, we will be presenting a poster on Tuesday night in the Education and Public Outreach Programs session to accompany our abstract, which is about how NASA might use Second Life for informal space science education and participatory exploration.

If we're lucky, Geosteph might tweet from the meeting so stay tuned!

How much ice might be on Mercury? Use math to find out!

The NASA MESSENGER spacecraft performed its first flyby of Mercury on January 14, 2008. In addition to mapping the entire surface of the planet, one of its goals is to shed new light on the existence of ice in the polar regions of this hot planet. Ice on Mercury? It's not as strange as it seems! Click here to learn more and to access a pdf that provides a series of space math questions (and an answer key) related to this topic. For more classroom activities related to ice in on Mercury and elsewhere in our solar system click here. For more space math problems visit http://spacemath.gsfc.nasa.gov. A new space math problem is added every week!

Latest image from the Mercury Flyby

Craters with Dark Halos on Mercury

As MESSENGER flew by Mercury, the Narrow Angle Camera (NAC) of the Mercury Dual Imaging System (MDIS) captured this view on January 14, 2008. Two of the larger craters in this image appear to have darkened crater rims and partial “halos” of dark material immediately surrounding the craters. Both craters appear to have nearly complete rims and interior terraced walls, suggesting that they formed more recently than the other nearby shallower craters of similar size. There are two possible explanations for their dark halos: (1) Darker subsurface material may have been excavated during the explosions from the asteroid or comet impacts that produced the craters. (2) Large cratering explosions may have melted a fraction of the rocky surface material involved in the explosions, splashing so-called “impact melts” across the surface; such melted rock is often darker (lower albedo) than the pre-impact target material.

For more images check out http://messenger.jhuapl.edu/gallery/sciencePhotos/view.php?gallery_id=2

Hello Mercury!!

The MESSENGER spacecraft will make its first flyby of Mercury today at 2:04:39 pm EST!! This image of Mercury was taken yesterday on January 13 when the spacecraft was at a distance of about 760,000 kilometers (470,000 miles) from Mercury. Mercury is about 4880 kilometers (about 3030 miles) in diameter, and the smallest feature visible in this image is about 20 kilometers (12 miles) across.

During the historic encounter today, extensive scientific data will be gathered. The Mercury Dual Imaging System cameras will acquire more than 1,200 images of Mercury, including images of portions of the surface never before viewed by a spacecraft. The Mercury Atmospheric and Surface Composition Spectrometer will observe Mercury's surface as well as its tenuous atmosphere. The Magnetometer will accurately measure Mercury's magnetic field, and the Energetic Particle and Plasma Spectrometer will characterize Mercury's space environment and interactions with the solar wind. The Mercury Laser Altimeter will sense surface topography along a narrow profile. The Gamma-Ray and Neutron Spectrometer and X-Ray Spectrometer will make the first measurements of Mercury’s surface elemental composition.

MESSENGER will begin to transmit the new data to Earth once all of the scientific measurements are completed, about 22 hours after the spacecraft's closest approach to Mercury. These flyby data will shed light on fundamental scientific questions related to the formation and evolution of the planet Mercury. As scientists analyze the data, the MESSENGER spacecraft will continue on its planned journey, which includes two more encounters of Mercury in October 2008 and September 2009, before entering an orbit around Mercury in March 2011.

Additional information and features from this first flyby will be available online at http://messenger.jhuapl.edu/mer_flyby1.html, so check back frequently. Following the flyby, be sure to check for the latest released images and science results!

Mercury Here We Come!!

This Monday, January 14, 2008, the MESSENGER spacecraft will make its first flyby of Mercury! Monday's flyby, which is taking place more than three decades after the last spacecraft visit of Mercury (Mariner 10), will take MESSENGER to about 200 kilometers above Mercury's surface. To learn more about the flyby, click here. The following movie features Sean C. Solomon, Principal Investigator for the MESSENGER mission.

Update on MESSENGER mission to Mercury

On Friday, November 30, the MESSENGER team resumed daily contact with its Mercury-bound spacecraft. Engineers had suspended contact on November 13 when the spacecraft’s trajectory moved it to the opposite side of the Sun from Earth and out of radio contact with NASA’s Deep Space Network for several weeks. Read the complete story here.

As of right now, there are 36 days, 22 hours, 24 minutes, and 57 seconds until MESSENGER's first flyby of Mercury on January 14, 2008! View the countdown clock at http://messenger.jhuapl.edu/.