MAVEN spacecraft returns first Mars observations

MAVEN spacecraft returns first Mars observations
Credit: Laboratory for Atmospheric and Space Physics, University of Colorado; NASA

NASA's Mars Atmosphere and Volatile Evolution (MAVEN) spacecraft has obtained its first observations of the extended upper atmosphere surrounding Mars.

The Imaging Ultraviolet Spectrograph (IUVS) instrument obtained these false-color images eight hours after the successful completion of Mars orbit insertion by the spacecraft at 10:24 p.m. EDT Sunday, Sept. 21, after a 10-month journey.

The image shows the planet from an altitude of 36,500 km in three ultraviolet wavelength bands. Blue shows the from the sun scattered from atomic hydrogen gas in an extended cloud that goes to thousands of kilometers above the planet's surface. Green shows a different wavelength of ultraviolet light that is primarily sunlight reflected off of , showing the smaller oxygen cloud. Red shows ultraviolet sunlight reflected from the planet's surface; the bright spot in the lower right is light reflected either from polar ice or clouds.

The oxygen gas is held close to the planet by Mars' gravity, while lighter hydrogen gas is present to higher altitudes and extends past the edges of the image. These gases derive from the breakdown of water and carbon dioxide in Mars' atmosphere. Over the course of its one-Earth-year primary science mission, MAVEN observations like these will be used to determine the loss rate of hydrogen and oxygen from the Martian atmosphere. These observations will allow us to determine the amount of water that has escaped from the planet over time.

MAVEN is the first spacecraft dedicated to exploring the tenuous of Mars.


Explore further

MAVEN Mars spacecraft to begin orbit of Red Planet

Provided by NASA
Citation: MAVEN spacecraft returns first Mars observations (2014, September 25) retrieved 17 July 2019 from https://phys.org/news/2014-09-maven-spacecraft-mars.html
This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only.
0 shares

Feedback to editors

User comments

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more