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originally posted by: AshOnMyTomatoes
Can we maybe discuss Pluto, and not devolve into what is almost certainly a Flat-Earth debate?
originally posted by: ZakOlongapo
a reply to: SuperFrog
sorry man, but we do not have plenty REAL single pictures of planet Earth.... the only single pic is from Apollo 17. All the others are composits , cgi or other tehnics )
.. i bet i know Your answer already.
i know even what NASA's answer is.
i just can't take it. with all the budget and all those missions across the solar system no single pic of The Earth for over 4o years. hmm, ok...
Wind-blown sand or ice dunes are known on Earth, Mars, Venus, Titan, and comet 67P/Churyumov-Gerasimenko. Telfer et al. used images taken by the New Horizons spacecraft to identify dunes in the Sputnik Planitia region on Pluto (see the Perspective by Hayes). Modeling shows that these dunes could be formed by sand-sized grains of solid methane ice transported in typical Pluto winds. The methane grains could have been lofted into the atmosphere by the melting of surrounding nitrogen ice or blown down from nearby mountains. Understanding how dunes form under Pluto conditions will help with interpreting similar features found elsewhere in the solar system.