by APOD Robot » Sun May 29, 2016 4:06 am
Valles Marineris: The Grand Canyon of Mars
Explanation: Mars will look good in Earth's skies over the next few days -- but not this good. To get a view
this amazing, a spacecraft had to actually visit the red planet. Running across the image center, though, is one the largest canyons in the
Solar System. Named
Valles Marineris, the grand valley extends over 3,000 kilometers long, spans as much as 600 kilometers across, and delves as much as 8 kilometers deep. By comparison, the
Earth's Grand Canyon in Arizona, USA is 800 kilometers long, 30 kilometers across, and 1.8 kilometers deep. The origin of the
Valles Marineris remains unknown, although a leading hypothesis holds that it started as a
crack billions of years ago as the planet cooled. Several geologic processes have been identified in
the canyon. The
featured mosaic was
created from over 100 images of
Mars taken by
Viking Orbiters in the 1970s.
Tomorrow, Mars and Earth will
pass the closest in 11 years, resulting in the red planet being
quite noticeable toward the southeast after sunset.
[/b]
[url=http://apod.nasa.gov/apod/ap160529.html][img]http://apod.nasa.gov/apod/calendar/S_160529.jpg[/img] [size=150]Valles Marineris: The Grand Canyon of Mars[/size][/url]
[b] Explanation: [/b] Mars will look good in Earth's skies over the next few days -- but not this good. To get a view [url=http://nssdc.gsfc.nasa.gov/photo_gallery/photogallery-mars.html]this amazing[/url], a spacecraft had to actually visit the red planet. Running across the image center, though, is one the largest canyons in the [url=http://space.jpl.nasa.gov/]Solar System[/url]. Named [url=http://www.youtube.com/watch?v=crsqzZNUXsY]Valles Marineris[/url], the grand valley extends over 3,000 kilometers long, spans as much as 600 kilometers across, and delves as much as 8 kilometers deep. By comparison, the [url=http://en.wikipedia.org/wiki/Grand_Canyon]Earth's Grand Canyon[/url] in Arizona, USA is 800 kilometers long, 30 kilometers across, and 1.8 kilometers deep. The origin of the [url=http://en.wikipedia.org/wiki/Valles_Marineris]Valles Marineris[/url] remains unknown, although a leading hypothesis holds that it started as a [url=http://apod.nasa.gov/apod/ap980310.html]crack[/url] billions of years ago as the planet cooled. Several geologic processes have been identified in [url=http://www.windows2universe.org/mars/interior/Valles_Marineris.html]the canyon[/url]. The [url=http://nssdc.gsfc.nasa.gov/photo_gallery/photogallery-mars.html]featured mosaic[/url] was [url=http://nssdc.gsfc.nasa.gov/photo_gallery/caption/marsglobe1.txt]created[/url] from over 100 images of [url=http://mars.jpl.nasa.gov/allaboutmars/facts/]Mars[/url] taken by [url=http://pds.jpl.nasa.gov/planets/welcome/viking.htm]Viking[/url] Orbiters in the 1970s. [url=http://3.bp.blogspot.com/-7ypke0sjV1U/UQzBFZCoscI/AAAAAAAAIQA/MWBVUGcnzqU/s1600/funny-definition-tomorrow-picture.jpg]Tomorrow[/url], Mars and Earth will [url=https://www.youtube.com/watch?v=TQ-qbykREXE]pass the closest[/url] in 11 years, resulting in the red planet being [url=http://mars.nasa.gov/allaboutmars/nightsky/mars-close-approach/]quite noticeable[/url] toward the southeast after sunset.
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