PIA19284: Mercury's Calcium Exosphere

Mercury’s Calcium Exosphere


The graphic shown here is more than just an artistic representation of Mercury's calcium exosphere - it is the result of a detailed model based on over four years of MASCS observations! This model image of Mercury's calcium exosphere shows the source region is on the dawn hemisphere of the planet.

Instrument: Mercury Atmospheric and Surface Composition Spectrometer (MASCS)

Background Info:

The MESSENGER spacecraft is the first ever to orbit the planet Mercury, and the spacecraft's seven scientific instruments and radio science investigation are unraveling the history and evolution of the Solar System's innermost planet. In the mission's more than four years of orbital operations, MESSENGER has acquired over 250,000 images and extensive other data sets. MESSENGER's highly successful orbital mission is about to come to an end , as the spacecraft runs out of propellant and the force of solar gravity causes it to impact the surface of Mercury in April 2015.

For information regarding the use of images, see the MESSENGER image use policy .

Cataloging Keywords:

Name Value Additional Values
Target Mercury
System Mercury
Target Type Planet
Instrument Host MESSENGER
Host Type Orbiter
Instrument Mercury Atmospheric and Surface Composition Spectrometer (MASCS)
Extra Keywords Artwork, Atmosphere, Color, Radio
Acquisition Date
Release Date 2015-04-14
Date in Caption
Image Credit NASA/Johns Hopkins University Applied Physics Laboratory/Carnegie Institution of Washington
Source photojournal.jpl.nasa.gov/catalog/PIA19284
Identifier PIA19284