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#MarsGale

August 16, 2012 Leave a comment

Curiosity on Mars: A Wall of Gale Crater 

“If you could stand on Mars, what would you see? The above image is a digitally re-colored approximation of what you might see if the above Martian landscape had occurred on Earth. Images from Mars false-colored in this way are called white balanced and useful for planetary scientists to identify rocks and landforms similar to Earth. The image is a high resolution version of a distant wall of Gale Crater captured by the Curiosity rover that landed on Mars last week. A corresponding true color image exists showing how this scene actually appears on Mars. The robotic Curiosity rover continues to check itself over and accept new programming from Earth before it begins to roll across Mars and explore a landscape that has the appearance of being an unusually layered dried river bed.”

Image Credit: NASAJPL-CaltechMSSS

Categories: Astronomy, Mars, NASA

Perseid Below

August 10, 2012 Leave a comment

Remember the upcoming Perseid Meteor Shower this weekend!

Perseid Below
Credit: Ron Garan, ISS Expedition 28 CrewNASA

Denizens of planet Earth watched last year’s Perseid meteor shower by looking up into the bright moonlit night sky. But this remarkable view captured on August 13, 2011 by astronaut Ron Garan looks down on a Perseid meteor. From Garan’s perspective onboard the International Space Station orbiting at an altitude of about 380 kilometers, the Perseid meteors streak below, swept up dust left from comet Swift-Tuttle heated to incandescence.

The glowing comet dust grains are traveling at about 60 kilometers per second through the denser atmosphere around 100 kilometers above Earth’s surface. In this case, the foreshortened meteor flash is right of frame center, below the curving limb of the Earth and a layer of greenish airglow, just below bright star Arcturus.

Want to look up at this year’s Perseid meteor shower? You’re in luck. This weekend the shower should be near its peak, with less interference from a waning crescent Moon rising a few hours before the Sun.

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