Tag Archives: USGS

Map of Mars by the U.S. Geological Survey

July 16th, 2014 | Space
Map of Mars US Geological Survey 1

via USGS

Geologic map of Mars on the left, elevation map on the right

Geologic map of Mars on the left, elevation map on the right

Over the past 16 years, the United States Geological Survery (USGS) has worked to create a global geographic map of Mars. The data to create the map principally came from 4 spacecraft: the Mars Global SurveyorMars OdysseyMars Express and Mars Reconnaissance Orbiter.

One of the most interesting findings to emerge from this data set is that the oldest geological region of Mars (~4 billion years, brown color region) is 3 times larger than originally suspected. In addition, the data backs up recent research which demonstrates that Mars was a geologically active planet until recently. But what does the word “recently” really mean in terms of planetary science?
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Well, many scientists believe that Mars was last active approximately 10 million years ago, which was before the common ancestor of the chimpanzee and the human split (~6 million years ago). But that’s still just a small time period for the history of the planet.
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The reason we care about geological activity is that active planets are believed to provide richly chaotic environments necessary for life to develop. Gaining a better understanding of Mars will give us a clearer picture of what to expect elsewhere in the Universe.
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For a more detailed view at the map above, please visit the USGS site.

-RSB

[via Wired]

All Of The Water On Earth

May 11th, 2012 | Space

The image above represents all of the water on the face of the Earth formed into a Moon-like sphere.  First of all, it looks pretty crazy to see the Earth without the oceans, pretty desolate actually.
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 And secondly, I expected all of the water to look like a LOT MORE WATER.

Here’s an excerpt from the USGS:

This picture shows the size of a sphere that would contain all of Earth’s water in comparison to the size of the Earth. The blue sphere sitting on the United States, reaching from about Salt Lake City, Utah to Topeka, Kansas, has a diameter of about 860 miles (about 1,385 kilometers) , with a volume of about 332,500,000 cubic miles (1,386,000,000 cubic kilometers).
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The sphere includes all the water in the oceans, seas, ice caps, lakes and rivers as well as groundwater, atmospheric water, and even the water in you, your dog, and your tomato plant.

If you’d like to see how this water is distributed, check out the graph below:

I also expected that biological water would take up a bigger piece of the pie.

-RSB

[via TheFoxIsBlack]