Here are details about a :
Space commemorative cover
or Space Cover.
Cosmodromo / Luogo : USA
Data di annullo: 24 Août 1981
Tipo di Evento : Tracking
Rampa di Lancio / Luogo : USA Pasadena (CA)
Missione con Equipaggio / Robotica : Robotica
Obiettivo/Tipo Missione : Spazio Profondo
ou?/where?: au sol - ground
autographe?: non - noneDescrizione : Lapetus and end of photos by Voyager 2. oone of the stranger moons of Saturn. Its density is similar to that of Rhea, indicating that it has a small allotment of rocky materials. Its leading side is dark with a slight reddish color while its trailing side is bright. The dark surface might be composed of matter that was either swept up from space or oozed from the moon`s interior. The real reason is still unknown. The dark material might be a thin layer of organic material perhaps similar to the complex substances found in the most primitive meteorites. However, there are no bright rimed craters present on the dark hemisphere. If the dark material is thin, it must be constantly renewed since a meteor impact would punch through the layer to reveal brighter surface material. Parola chiave :
#Luna e sonde,
#NASA,
#Pianeta,
#Pietre nel cielo,
#Satellite,
#Sonda,
#Spazio profondo, Questo è FUORI dalle Riviste dello Spazio. Ultima modifica: 29/05/2015 @ 15h33
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Pagina : future · Ref: USA 1553 Avvenimento Spaziale : VOYAGER 2 (OUTER PLANETS PROBE) · SATURN & HER MOONS
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