Tuesday, December 6, 2016
Wednesday, November 30, 2016
Tuesday, November 29, 2016
Mars Profile
Mars Planet Profile
| Equatorial Diameter: | 6,792 km |
| Polar Diameter: | 6,752 km |
| Mass: | 6.42 x 10^23 kg (10.7% Earth) |
| Moons: | 2 (Phobos & Deimos) |
| Orbit Distance: | 227,943,824 km (1.52 AU) |
| Orbit Period: | 687 days (1.9 years) |
| Surface Temperature: | -153 to 20 °C |
| First Record: | 2nd millennium BC |
| Recorded By: | Egyptian astronomers http://space-facts.com/mars/ |
Sunday, November 27, 2016
Saturday, November 26, 2016
Starburst Spider
Mars' seasonal cap of carbon dioxide ice has eroded many beautiful terrains as it sublimates (goes directly from ice to vapor) every spring. In the region where the High Resolution Imaging Science Experiment (HiRISE) camera on NASA's Mars Reconnaissance Orbiter took this image on Feb. 4, 2009, we see troughs that form a starburst pattern.
Wind at Work on the Martian Surface
Wind is one of the most active forces shaping Mars' surface in today's climate. The wind has carved the features we call "yardangs," one of many in this scene, and deposited sand on the floor of shallow channels between them. On the sand, the wind forms ripples and small dunes.
https://www.nasa.gov/mission_pages/mars/images/index.html
Martian Morse Code ?
This image of dark dunes on Mars was taken on Feb. 6, 2016, by the HiRISE camera on NASA's Mars Reconnaissance Orbiter. These dunes are influenced by local topography. The shape and orientation of dunes can usually tell us about wind direction, but in this image, the dune-forms are very complex, so it’s difficult to know the wind direction.
https://www.nasa.gov/mission_pages/mars/images/index.html
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