di niente 2d7!!
![[;)]](./images/smilies/UF/icon_smile_wink.gif "Occhiolino")
mi fa piacere che hai gradito la spiegazione. affrontai lo stesso argomento anni fa....quella discussione sarà perduta nei meandri del mitico forum di ufologia.net...
per quanto riguarda la foto notturna, qui c'è una spiegazione nasa:
http://marsrovers.nasa.gov/gallery/pres ... 0311a.html (in fondo)
HiRes:
http://marsrovers.nasa.gov/gallery/pres ... A067R1.jpgStars and Cosmic Rays Observed from MarsIn this five-minute exposure taken from the surface of Mars by NASA's Spirit rover, stars appear as streaks due to the rotation of the planet, and instantaneous cosmic-ray hits appear as points of light.
Spirit took the image with its panoramic camera on March 11, 2004, after waking up during the martian night for a communication session with NASA's Mars Global Surveyor orbiter. Other exposures were also taken. The images tested the capabilities of the rover for night-sky observations. Scientists will use the results to aid planning for possible future astronomical observations from Mars.
The difference in Mars' rotation, compared to Earth's, gives the star trails in this image a different orientation than they would have in a comparable exposure taken from Earth.
Image credit: NASA/JPL/Cornell
...quindi raggi cosmici secondo la nasa...non so con quanta certezza si possa dire.
sulla stessa pagina web c'è questa foto enigmatica:
ne abbiamo discusso tempo fa anche di questa.
gli scienziati dicono questo:
Cita:
Scientists theorize that the mystery line could be either a meteorite or one of seven out-of-commission spacecraft still orbiting Mars. Because the object appeared to move 4 degrees of an arc in 15 seconds it is probably not the Russian probes Mars 2, Mars 3, Mars 5, or Phobos 2; or the American probes Mariner 9 or Viking 1. That leaves Viking 2, which has a polar orbit that would fit with the north-south orientation of the streak. In addition, only Viking 1 and 2 were left in orbits that could produce motion as fast as that seen by Spirit. Said Mark Lemmon, a rover team member from Texas A&M University, Texas, "Is this the first image of a meteor on Mars, or an image of a spacecraft sent from another world during the dawn of our robotic space exploration program? We may never know, but we are still looking for clues."
...non lo sapremo mai forse cos'è....stiamo cercando di farci venire un'idea...
bella eh?
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