Percival Lowell's Canals of Mars

Percival Lowell's Canals of Mars

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Coming soon!  Real World Globes is superimposing the observed canal systems of Mars on its antiqued topographic surface to make a unique Science Fiction Classic which you will want for your personal collection.

 

Percival Lowell published Mars and its Canals in 1906 and dedicated his work to Giovanni V. Schiaparelli.  In 1877 Mars was in the best viewing position for 30 years.  Schiaparelli named the large southern impact crater Hellas Planitia along with another 300 Martian features including linear features he thought connected light and dark patches.

Some of Lowells' text is annotated here.  

 In 1892 W.H. Pickering at “Arequipa”(1) was the chief observer of the planet Mars, he detected small round spots scattered over the surface of the planet and connected with the canal system, which he called lakes.  He also detected more or less irregular lines traversing the Mare Erythraeum which he called river systems, sometimes schematically "canals."

 In 1894 Mr Douglass assistant to Lowell at Flagstaff, AZ found the seas to be crossed by lines as regular and as regularly connected as the canals in the light regions.

Werner Von Braun essay Collier’s, March,1952 “the Martian Project” outlined the exploration of Mars.

Sputnik launched by the Soviet Union Oct 4,1957 spurred the Americans into action.

NASA founded July 29, 1958, T. Keith Glenman was first Director of NASA, he consolidated Army and Navy operations and gained control of JPL in Pasadena, CA in 1958.

Mariner 4 arrived 6000 miles above Mars July15, 1965 providing the first close-up pictures showing heavily cratered surface more like the moon than earth.  The theories of Schiaparelli and Lowell were exposed as pure myth.

Viking 1 and 2  launched in Fall, 1975, they had analysers on board which landed on Mars.  Carl Sagan of the Viking team wrote in 1977 that they found no evidence of life.  The landers were not mobile.  The next successful landing in 1997 was Pathfinder which showed that mobile exploration could be done.

 

 

(1)(Boyden Observatory, established by Harvard in 1891 near the second most populous city of Peru, http://oasis.lib.harvard.edu/oasis/deliver/~hua04008 ) .

 

 

 

From:

http://www.space.com/32917-mars-tsunamis-ancient-oceans.html

 

Traces of tsunamis on Mars are the newest clues yet that the Red Planet once had oceans, which could have supported life, researchers said.

These killer waves might have been triggered by giant meteor impacts, scientists added.

Although the surface of Mars is now cold and dry, there is a great deal of evidence suggesting that an ocean's worth of water covered the Red Planet billions of years ago. Since life is found on Earth virtually wherever there is liquid water, some researchers have suggested that life might have evolved on Mars when the planet was wet. Life could survive there even now, hidden underground, some scientists have said.

From:

https://www.nasa.gov/press/2015/march/nasa-research-suggests-mars-once-had-more-water-than-earth-s-arctic-ocean

 A primitive ocean on Mars held more water than Earth’s Arctic Ocean, according to NASA scientists who, using ground-based observatories, measured water signatures in the Red Planet’s atmosphere.

Scientists have been searching for answers to why this vast water supply left the surface. Details of the observations and computations appear in Thursday’s edition of Science magazine.

“Our study provides a solid estimate of how much water Mars once had, by determining how much water was lost to space,” said Geronimo Villanueva, a scientist at NASA’s Goddard Space Flight Center in Greenbelt, Maryland, and lead author of the new paper. “With this work, we can better understand the history of water on Mars.”

Perhaps about 4.3 billion years ago, Mars would have had enough water to cover its entire surface in a liquid layer about 450 feet (137 meters) deep. More likely, the water would have formed an ocean occupying almost half of Mars’ northern hemisphere, in some regions reaching depths greater than a mile (1.6 kilometers).

The new estimate is based on detailed observations made at the European Southern Observatory’s Very Large Telescope in Chile, and the W.M. Keck Observatory and NASA Infrared Telescope Facility in Hawaii. With these powerful instruments, the researchers distinguished the chemical signatures of two slightly different forms of water in Mars’ atmosphere. One is the familiar H2O. The other is HDO, a naturally occurring variation in which one hydrogen is replaced by a heavier form, called deuterium.

By comparing the ratio of HDO to H2O in water on Mars today and comparing it with the ratio in water trapped in a Mars meteorite dating from about 4.5 billion years ago, scientists can measure the subsequent atmospheric changes and determine how much water has escaped into space.

The team mapped H2O and HDO levels several times over nearly six years, which is equal to approximately three Martian years. The resulting data produced global snapshots of each compound, as well as their ratio. These first-of-their-kind maps reveal regional variations called microclimates and seasonal changes, even though modern Mars is essentially a desert.

The research team was especially interested in regions near Mars’ north and south poles, because the polar ice caps hold the planet’s largest known water reservoir. The water stored there is thought to capture the evolution of Mars’ water during the wet Noachian period, which ended about 3.7 billion years ago, to the present.

From the measurements of atmospheric water in the near-polar region, the researchers determined the enrichment, or relative amounts of the two types of water, in the planet’s permanent ice caps. The enrichment of the ice caps told them how much water Mars must have lost – a volume 6.5 times larger than the volume in the polar caps now. That means the volume of Mars’ early ocean must have been at least 20 million cubic kilometers (5 million cubic miles).

Based on the surface of Mars today, a likely location for this water would be in the Northern Plains, considered a good candidate because of the low-lying ground. An ancient ocean there would have covered 19 percent of the planet’s surface. By comparison, the Atlantic Ocean occupies 17 percent of Earth’s surface.

“With Mars losing that much water, the planet was very likely wet for a longer period of time than was previously thought, suggesting it might have been habitable for longer,” said Michael Mumma, a senior scientist at Goddard and the second author on the paper.

NASA is studying Mars with a host of spacecraft and rovers under the agency’s Mars Exploration Program, including the Opportunity and Curiosity rovers, Odyssey and Mars Reconnaissance Orbiter spacecraft, and the MAVEN orbiter, which arrived at the Red Planet in September 2014 to study the planet’s upper atmosphere.

In 2016, a Mars lander mission called InSight will launch to take a first look into the deep interior of Mars. The agency also is participating in ESA’s (European Space Agency) 2016 and 2018 ExoMars missions, including providing telecommunication radios to ESA’s 2016 orbiter and a critical element of the astrobiology instrument on the 2018 ExoMars rover. NASA’s next rover, heading to Mars in 2020, will carry instruments to conduct unprecedented science and exploration technology investigations on the Red Planet.

NASA’s Mars Exploration Program seeks to characterize and understand Mars as a dynamic system, including its present and past environment, climate cycles, geology and biological potential. In parallel, NASA is developing the human spaceflight capabilities needed for future round-trip missions to Mars in the 2030s.

To view a video of this finding, visit:

http://youtu.be/WH8kHncLZwM

More information about NASA's Mars programs is online at:

http://www.nasa.gov/mars

-end-

Dwayne Brown
Headquarters, Washington
202-358-1726
dwayne.c.brown@nasa.gov

Nancy Neal Jones/Elizabeth Zubritsky
Goddard Space Flight Center, Greenbelt, Md.
301-286-0039 / 301-614-5438
nancy.n.jones@nasa.gov / elizabeth.a.zubritsky@nasa.gov

Last Updated: July 30, 2015

Editor: Karen Northon

Tags:  Goddard Space Flight CenterMarsPlanetsSolar System

 

 

 

H.G. Wells wrote War of The Worlds published 1898; here is an excerpt about seeing Martians in New Jersey:

Seen nearer, the Thing was incredibly strange, with a ringing metallic pace, and long, flexible, glittering tentacles swinging and rattling about its strange body.… Behind the main body was a huge mass of white metal like a gigantic fisherman’s basket, and puffs of green smoke squirted out from the joints of the limbs as the monster swept by me. And in an instant it was gone.—Book 1, Chap. 10, ¶15

 

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