On January 14, 2005 was
a historic day. The European probe Huygens became the first human relic to land
on one of the world’s most charming solar system: Titan. Seven years after the
ESA scientists have renovate the sequence of impact with the surface using
computer models and simulations with real models, finding that it was a bit
rougher than expected.
The probe hit the
ground at an angle of 10 ° with the direction of travel, forming a small crater
12 centimeters deep. Then slid about 30-40 centimeters above the surface before
stopping. Small vibrations caused by landing were recorded by the instruments
of the probe up to ten seconds after the initial impact. The ship also struck
an ice-pebble 'rock' on Titan is actually water-ice about two inches, crushing
him to the ground. This indicates that the floor of the landing zone had the
consistency of wet sand, which is consistent with models that suggest that
Huygens landed on the bed of an ancient river of methane, although the
simulation rule that the area was 'wet' with large quantities of liquid
methane.
It is further believed
that the probe raised during four seconds a small cloud of aerosol formed by
organic dust that precipitate from the upper atmosphere and deposited on the
surface. Also known as tholins -name coined by Carl Sagan, these aerosols are a
true manna chemical which is one of the main attractions of Titan scientists.
Titan's surface seen by
the Huygens
This study not only
gives us a new perspective on the first landing on Titan, but that shows how to
extract scientific results of a mission that took place more than seven years.
Titan is one of the six worlds of the solar system in which humanity has
managed to place a spacecraft (the Moon, Mars, Venus and the asteroid Itokawa
and Eros are the others). But Huygens probe was the first spacecraft to visit
the surface of a world outside our solar system. To date remains the most
distant landing ever made by a probe (more than 1.5 billion miles from the
sun). And it seems that, unfortunately, keep this record for many decades.
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