Upstream | February 10, 2012 | 54 comments

Is Venus’ Rotation Slowing Down?

Image
pjacobs51
New measurements from ESA’s Venus Express spacecraft shows that Venus’ rotation rate is about 6.5 minutes slower than previous measurements taken 16 years ago by the Magellan spacecraft. Using infrared instruments to peer through the planet’s dense atmosphere, Venus Express found surface features weren’t where the scientists expected them to be.

Using the VIRTIS infrared instrument, scientists discovered that some surface features were displaced by up to 20 km from where they should be given the accepted rotation rate as measured by the Magellan orbiter in the early 1990s.

Over its four-year mission, Magellan determined the length of the day on Venus as being equal to 243.0185 Earth days. But the data from Venus Express indicate the length of the Venus day is on average 6.5 minutes longer.

What could cause the planet to slow down? One possibility may be the raging weather on Venus. Recent atmospheric models have shown that the planet could have weather cycles stretching over decades, which could lead to equally long-term changes in the rotation period. The most important of those forces is due to the dense atmosphere – more than 90 times the pressure of Earth’s and high-speed weather systems, which are believed to change the planet’s rotation rate through friction with the surface.

Earth experiences a similar effect, where it is largely caused by wind and tides. The length of an Earth day can change by roughly a millisecond and depends seasonally with wind patterns and temperatures over the course of a year.

But a change of 6.5 minutes over a little more than a decade is a huge variation.


http://www.universetoday.com/93494/is-venus-rotation-slowing-down/
  1. groups:
    Community,   Upstream,   Odd News,   Space,   3 more
  2. tags:
    Venus
  3. recommended by:
    pjacobs51
  4.     
    |

54 comments // Is Venus’ Rotation Slowing Down?

  • PressCore
    • +5
      PressCore  
    • Saw the documentary on H2 ( History International ) channel yesterday.
      Definitely worth watching. On the Winter solstice circa Dec, 21, 2012,
      the Earth will be entering the New Age # 6, as the Sun rises in conjunction
      with the center of the Galactic core where a supermassive black hole is
      located. Venus is supposed to pass in front of the Sun in an eclipse which
      is a somewhat rare occassion that per se happens only once every 100
      years. The ancient Mayans ostensibly developed their cosmic clock cal
      culations because they were visited by E.T.s long before who geneticly engineered. them to mine Gold for their ships. Otherwise they were brutal savages making bloody human sacrifices as the Aztecs did. But due to the
      E.T.'s influence the Mayan kings saw themselves as masters of time and
      space itself. They had a lot of cohones after their E.T. visitations. They
      ventured many many leagues in open boats to a small island in the South
      Pacific, where their king had a large labor force carve a monument out
      of the volcanic rock ledge which was several hundred feet high.

      From this one spot only on all the earth, they were told they could watch
      the Venus eclipse at the reset of their cosmic clock in the next Age which
      happens only on one day in many thousands of years. Venus, and all
      the other planets in our solar system were believed to be Gods to the
      ancient Mayans. Venus was their highest God. And whenever Venus
      had a special transit with the Sun, it was considered a spiritual experience
      they had with their Gods, and with their dead ancestors. One Historical
      fact is that during the beginning of the last Mayan Age, the influence
      of the black hole's emission of gamma radiation bursts made extinct
      hundreds of animal species, caused widespread sizemic disruptions
      in erupting volcanos, and earthquakes. But the interesting fact of that
      last occurrence was that it happened on the Summer Solstice. Supposedly,
      it has the opposite effect of destruction alternating between the Solstices.
      The H2 documentary is called Apocalypse Island. And it IS fascinating.

    • 4 months ago
  • circlesquared
    • +3
      circlesquared  
    • PressCore:

      cool, gonna take a break and check it out. Would like to point out the Mayans stopped most blood sacrifice when Quetzalcoatl arrived and brought them renewed understanding of life and it's value.

    • 4 months ago
  • PressCore
    • +4
      PressCore  
    • circlesquared:

      The documentary claimed that only 4 of the ancient Mayan's books survive
      to this day because the Christian missionaries had such an overreaction to
      seeing their blood sacrifices that they wanted to repress any recorded
      materials associated with their cultural traditions. They likened it to future
      modern people visiting New York City after an Apocolypse had destroyed
      all their libraries of stored books, and trying to envision what their culture
      was like from only their engravings in granite, and stone. What a world.
      It's true what they say though. That the ancient Peruvian landing strips
      shaped like icons and carved out of solid rock, could have been seen
      from space. The E.T.s must have been visiting the Mayans for a long
      long time. Maybe they had the most advanced metal detector of all. The
      E.T.s did the same thing in Eqypt when they enabled the ancient Eqyptians
      to build the pyramids which were all deliberately oriented toward very
      specific constellations. The pyramids themselves theorized to being
      hydrogen fuel factories. And solid Gold artifacts of airplanes dating back
      many thousands of years. These artifacts were computer scanned &
      measured, then reproduced. They flew perfectly, being found to have
      perfect aerodynamics not present on even the most modern human
      only engineered aircraft. A A A A Aliens !

    • 4 months ago
  • circlesquared
    • +2
      circlesquared  
    • PressCore:

      the Egyptians also traveled the planet...pyramids in China, underground cities in the Grand Canyon and Death Valley, and a tomb to a pharaohs son bitten by a snake in Australia. History and books have been destroyed on purpose since the beginning of things always in the name of righteousness...would love to have seen the Great Library...could have spent a great deal of time studying there.

    • 4 months ago
  • The_Wanderer_Kansas
    • +1
      The_Wanderer_Kansas  
    • circlesquared:

      OK I wanna see a link on information for this tomb in Australia. The underground cities in North America I will argue are not of Egyptian influence, I have been to many of them and the quality of the stonework is not even in the same realm as Egyptian artisanry. To give them credit for this takes much away from my native ancestors. The pyramids in China are more convincing, but again there is only one similarity between the chinese structures and those of egyptians and thats the overall shape of the structures, all the details and construction methods are quite different. I am however very curious about this Australian tomb.

    • 4 months ago
  • circlesquared
  • circlesquared
  • circlesquared
    • +1
      circlesquared  
    • Image
    • The_Wanderer_Kansas:

      as for China...there are more pyramids there than in Egypt, the largest is 4 times that of the Great Pyramid, but even most Chinese don't even know they are there when I ask about them. Strange that the Great Pyramid is taught to be one of the largest man made structures on Earth, yet we know nothing of one so much bigger in China.

    • 4 months ago
  • The_Wanderer_Kansas
    • +1
      The_Wanderer_Kansas  
    • circlesquared:

      Thank you, and I wouldn't have doubted it before but I will take this as evidence that they were traveling. However they were on an exploratory mission here, not one of apparent colonial or diplomatic intentions. It's highly interesting to see the script about their damaged "ship" harbored in shallows tied off by rope. This is a solid piece of evidence actually against the "egyptians were technologically superior even to modern people". If these people were capable of flight why would the son of the Pharoah be made to travel by sail and foot if the supposed tech was actually available? I would love full photos of the engraved walls to allow for translation through multiple sources just to be certain of what they say.

      So ya, the Egyptians at least passed through NW coastal Queensland, which I am thinking would be FAR more the case with the North American or Chinese connections as well, trade of resources and ideas or perhaps artifacts but not actually colonization in locales that they could not support or defend so far from their "motherland".

      --Edit--Additionally have you read the news lately that it would seem our native american peoples are actually the decendants of early oriental people. The similarities to Tibetan religious traditions are strong in this case as well.
      http://www.sciencedaily.com/releases/2009/04/090428223836.htm
      http://www.newscientist.com/article/dn11178-native-american-populations-share-ge...

      This site could just as likely (if not more so) be he only remains of the supposedly siberian culture that was imported here during their migration to North America... I would try to see and reconcile this with evidence of ancient homesteading along the Pacific Coast and foothills of the Rockies. Because of this information I am already researching what I can about Native American origins myths and those of the Tibet/Siberian region of Asia to see what similarities and glaring inconsistancies they may have.

    • 4 months ago
  • The_Wanderer_Kansas
    • +1
      The_Wanderer_Kansas  
    • circlesquared:

      OK again on the Grand Canyon links you gave I have to point out that the one focusing on the "Smithsonian Conspiracy" is extremely biased both idealogically and politically, despite presenting decently strong arguements in favor they fail to provide ANY evidence of the Grand Canyon claim. The second site, philipcoppens is much more unbiased and factually oriented. However a link presenting evidence of people who "know" where the archeological site is then intimation that he had never actually been there doesn't bode well for either arguement for or against. However I did find one sentence from the original news article that would make it obvious to anyone with a strong understanding of Egyptian Heiroglyphs that the markings reportedly discovered ARE NOT of Egyptian heritage.

      "The engraving on the tables probably has something to do with the religion of the people. Similar hieroglyphics have been found in southern Arizona. Among the pictorial writings, only two animals are found." Similar markings in Arizona (Pueblo, Cherokee, Anasazi and many others) would indicate a native language, especially considering that among the writings only TWO animals were found. Even the simple naming convention of the ancient Egyptians would lead to the use of FAR more then just two animal figures in their scripts. There is no photographic evidence of these glyphs, but I know that the native languages that have some script associated with them are more geometric(squares, sun circles, spirals) or whimsical (forms of waves or "wind gusts") and do not include nearly as many animal patterns as their Egyptian counterpart. Again I stand by my thoughts these locations in NA are remnants of our native cultures, of course with the open mind that they may have been constructed at the suggestion of visitors from the Nile delta, but not actually BY them.

      P.S. as far the park rangers and access to a site are concerned, have you never gone someplace you weren't supposed to go? Its not as if huge swathes of the canyon are roped off or held under armed guard. Grab your supplies and a good local guide and you can go anywhere in the region that you want to...except for the inner workings of the Hoover Dam, that does have armed guards.

    • 4 months ago
  • The_Wanderer_Kansas
    • +1
      The_Wanderer_Kansas  
    • circlesquared:

      The pyramid debate will rage on until we have evidence. My arguement here is that the pyramid is one of the most simple and strongest geometric structure. The first person to build a trussed(angled) roof knew the inherent strength of the rectangle and this left only one square structure away from understand the logevity and strength of four triangles joined at the edge. The argument about "How would they know that a pyramid made of stone would last forever?" is rediculous at the most base of levels. A rectangular structure with a flat roof will collapse much faser and under much less stress then one with an angled roof, and a roof that angles up from all four sides is that much stronger. The pyramid cannot be viewed as a strictly "egyptian invention". This is like saying the Sumarians invented the circle because they were the first to depict circles in their art and therefor every circle you see before the convention of mathematics and geometry were put there by the Sumarians.

    • 4 months ago
  • circlesquared
    • +1
      circlesquared  
    • The_Wanderer_Kansas:

      right, just exploring...look up the ancient maps also that have as much accuracy as our current satellite images. They show Antarctica without ice many years ago and we supposedly discovered it around 1890 I believe. Much of our history is hidden and destroyed.

    • 4 months ago
  • circlesquared
    • 0
      circlesquared  
    • The_Wanderer_Kansas:

      true, but pyramids can be found on every continent...I even found one on Antarctica looking at google earth that when I went back to share the spot I had marked a few months later was blurred and covered by a CGI image...it is my thought after a great deal of research in many directions that after the sinking of Atlantis the high priests spread to many corners of the world and took what knowledge they had with them. That is why we see crude antiquities right next to unexplainable tech and understanding that these cultures should not have had. Drastic advances came to many civilizations around the exact same time and I no longer believe in coincidence.

      There has been a purposeful destruction of history and much of the speculation on what has been discovered is cataloged as conspiracy and bunk.

    • 4 months ago
  • circlesquared
    • +1
      circlesquared  
    • The_Wanderer_Kansas:

      the US Egypt ties are very vague despite news articles from the era they were found...apparently there were relics of many ancient cultures found there including very large mummified remains. Unfortunately in order to figure out what might hold some truth we are forced to sift through the refuse dumped on top.

    • 4 months ago
  • The_Wanderer_Kansas
    • +1
      The_Wanderer_Kansas  
    • circlesquared:

      Very large skulls attached to mummified remains is what I read, but yeah there is much to relearn. But the pyramid connection I am very dubious of because of the simplicity of the structure and the MANY ways that humans could be persuaded to try a structure of the type... play with sand you will eventually make a pyramidlike shape, freestanding and made of nothing buyt loose sand... stare at a mountain long enough and the shape of a pyramid becomes apparent and we have long sought to simulate the strengths we witness in nature.

      Yes, the deplorable loss of knowledge is a tale as old as mankind itself, and should never happen the way it has, however making connections between two points of interest need to be done so with the utmost respect for the evidence at hand.

    • 4 months ago
  • EmperorThan
  • coolplanet
  • remanns
  • PressCore
    • +3
      PressCore  
    • coolplanet:

      The ostensibly metaphysical Venus influence is said to be that of harmony.
      That would make sense if it's rotating in the dexter ( right to left ) direction
      compared to the sinister ( left to right ) direction. Maybe it has more Feng Shui
      making it's Kung Fu stronger than other planets comparatively. ( Or perhaps not )

    • 4 months ago
  • Johnny_Los_Angeles
  • Gillian_Marktoo
  • rerushg
  • jim_b
  • Kelly_Balthrop
  • MSII
  • coolplanet
  • Kelly_Balthrop
  • coolplanet
    • +1
      coolplanet  
    • Kelly_Balthrop:

      Only backwards.....

      http://www.astronomycafe.net/qadir/q50.html

      Why does Venus rotate backwards from the other planets?

      The rotation period of Venus cannot be decided through telescopic observations of its surface markings because its featureless thick atmosphere makes this impossible. In the 1960's, radar pulses were bounced off of Venus while at its closest distance to the Earth, and it was discovered that its rotation period, its day, was 243.09 +/- 0.18 earth days long, but it rotated on its axis in a backwards or retrograde sense from the other planets. If you were to look down at the plane of the solar system from its 'north pole' you would see the planets orbiting the Sun counter clockwise, and rotating on their axis counterclockwise. Except for Venus. Venus would be rotating clockwise as it orbited the Sun counterclockwise.

    • 4 months ago
  • Kelly_Balthrop
    • +2
      Kelly_Balthrop  
    • coolplanet:

      hmm. I was not aware of that. Since all planets that coalesced from the same primordial material contain the same orbital momentum, there can only be a couple of answers.

      A. Venus formed elsewhere and then was capture in solar orbit at a later date.
      B. Venus was impacted at some point by another object large enough to spin it in another direction.
      C. Something impacted Venus that was large enough to turn it upside down; flip the poles.

    • 4 months ago
  • coolplanet
    • +2
      coolplanet  
    • Kelly_Balthrop:

      I lean towards: A. Venus formed elsewhere and then was capture in solar orbit at a later date.
      I'm a fan of the late great Immanuel Velikovsky and his Worlds In Collision theory.
      He proposed that Venus was actually born from the Eye of Jupiter some 4,000 years ago as recorded in the legend of Aphrodite and Zeus, as well as countless myths worldwide.
      The Mesoamerican deity Quetzalcoatl is strongly associated with this Venus event.
      I don't "believe" this necessarily happened but find it very fascinating nonetheless.

    • 4 months ago
  • Kelly_Balthrop
  • coolplanet
    • +2
      coolplanet  
    • Kelly_Balthrop:

      I also like: B. Venus was impacted at some point by another object large enough to spin it in another direction.

      Since Venus' clockwise rotation has seemingly slowed by 6.5 minutes in the past 16 years we should be able to do the math to calculate when that impact occurred.

    • 4 months ago
  • circlesquared
  • circlesquared
  • coolplanet
    • +2
      coolplanet  
    • circlesquared:

      I equally admire science and mythology. I see them as entirely different subjects except in the few instances where they collide, like this.
      Albert Einstein in his later years worked to bridge science and spirit. Bucky Fuller basically proved that our economy is metaphysical.
      All I know is that there MUST be an intelligence much greater than man.
      I am in awe of Universe.....

    • 4 months ago
  • remanns
    • +2
      remanns  
    • Kelly_Balthrop:

      If another object in a VERY close parallel orbit to the sun, traveling at greater velocity, were to pass it from BEHIND , repeatedly, and exert a gravitic tidal pull on the same hemisphere with each repeated pass,......

      hmmm,.....I like this sort of thing,....still pondering....

    • 4 months ago
  • EmperorThan
  • EmperorThan
  • coolplanet
    • +1
      coolplanet  
    • EmperorThan:

      Venus certainly gives a whole new meaning to retrograde.
      But I question an axis tilt of 177 degrees. Are you referring to astrological degrees?
      Uranus is the only planet that rotates in such a cockeyed manner that I know of.
      I like to learn. Tell me more!

    • 4 months ago
  • Kelly_Balthrop
  • coolplanet
  • EmperorThan
  • circlesquared
  • circlesquared
  • Milieu
  • remanns
    • +3
      remanns  
    • Well, even the sexiest partner slows down with age.

      ( hard to keep up the same old grind )

      Try changing the angle of rotation or something.

    • 4 months ago
  • Kelly_Balthrop
    • +3
      Kelly_Balthrop  
    • There must be an error or another explanation somehow. At that rate it would stop rotating in about half a million years; just the blink of an eye. I bet they will discover an erroneous measurement, or another explanation like rapid plate tectonics in a semi molten crust.

    • 4 months ago
  • remanns
  • circlesquared
  • Kelly_Balthrop
    • +2
      Kelly_Balthrop  
    • circlesquared:

      Something powerful enough to slow down a planets rotation would be really hard to miss. The moon is slowing down the Earth, but it's millions of times less effect, the moon is really big, and the effect is caused by our Oceans, which Venus does not have. I still stand by my theory that it's a measurement error.

    • 4 months ago
  • circlesquared
  • MSII
  • Kelly_Balthrop
  • TanzaniteDiamonds
more from Upstream:

top videos