Mars Orbiter Mission: "A shot of Martian atmosphere. I’m getting better at it. No pressure." (posted to the probe’s Twitter account, @MarsOrbiter)
The view is nice up here. pic.twitter.com/VmAjNI76lm— ISRO’s Mars Orbiter (@MarsOrbiter) September 25, 2014
NASA’s Mars Atmosphere and Volatile Evolution (MAVEN) spacecraft has obtained its first observations of the extended upper atmosphere surrounding Mars.Credit: Laboratory for Atmospheric and Space Physics /University of Colorado and NASA
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 ultraviolet light 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 atomic oxygen, 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 upper atmosphere of Mars.
A NASA news conference was held to announce the arrival of the MAVEN spacecraft into Mars’ orbit at 10:24 p.m. EDT Sunday, Sept. 21, where it now will prepare to study the Red Planet’s upper atmosphere as never done before.(Video credit: NASA)
MAVEN is the first spacecraft dedicated to exploring the tenuous upper atmosphere of Mars. After a 10-month journey, confirmation of successful orbit insertion was received at 10:24 p.m. from MAVEN data, observed at the Lockheed Martin operations center in Littleton, Colorado, as well as from tracking data monitored at NASA’s Jet Propulsion Laboratory (JPL) navigation facility in Pasadena, California. The telemetry and tracking data were received by NASA’s Deep Space Network antenna station in Canberra, Australia.
Following orbit insertion, MAVEN will begin a six-week commissioning phase that includes maneuvering into its final science orbit and testing the instruments and science-mapping commands. MAVEN then will begin its one Earth-year primary mission, taking measurements of the composition, structure and escape of gases in Mars’ upper atmosphere and its interaction with the sun and solar wind.
A giant arch of plasma rose up out of the Sun and then stretched itself until it had reached back to a point behind our view of the Sun (Sept, 17-18, 2014). Since it emerged from a magnetically intense active region, the arch is likely connecting to another active region over the Sun’s horizon. We rarely see material extend this distance. The images were observed in the extreme ultraviolet wavelength of 171 Angstroms. Credit: Solar Dynamics Observatory/NASA.
Launch of Apollo 17, the only night launch of a Saturn V rocket. NASA estimated at the time that the launch would be visible from 500 miles away.
"Star Tracker" Tracks Comet ISON (UW-Madison, December 2013)
MAVEN: NASA media briefing ahead of Mars orbit insertion on September 21st, 2014
Gaofen-1: “Farms along the beach of an estuary”, part of an image release from China’s new earth resources satellite.