2 "Ficheiro:Titan_Balloon.jpg".

Ficheiro:Titan Balloon.jpg

|Beschreibung = Balloon on Titan as part of the [[Tandem (Raumsonde)|Tandem]] mission. |Quelle = http://sse.jpl.nasa.gov/multimedia/gallery/Titan_Balloon_Balint_rev1%201-1-thm...

Ficheiro:Making the Invisible Visible- A History of the Spitzer Infrared Telescope Facility (1971–2003) - NASA Monographs in Aerospace History, No. 47 (2017).pdf

report, 1990 (available online at http://history.nasa.gov/augustine/image9.jpg (accessed 30 August 2016); also b) memo from Charles J. Pellerin, 18 May...

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