Rosetta Stone the Napoleonic Wars, a long-running dispute over the relative value of Young and Champollion's contributions to the decipherment and, since 2003, demands for the stone's return to Egypt. Two other fragmentary copies of the same decree were discovered later, and several similar Egyptian bilingual or trilingual inscriptions are now known, including two slightly earlier Ptolemaic decrees (the Decree of Canopus in 238 BC, and the Memphis decree of Ptolemy IV, c. 218 BC). The Rosetta Stone is, therefore, no longer unique, but it was the essential key to modern understanding of Ancient Egyptian literature and civilisation. The term "Rosetta Stone"
Philae (spacecraft) the Philae obelisk, which bears a bilingual inscription and was used along with the Rosetta Stone to decipher Egyptian hieroglyphs. "Philae" was monitored and operated from DLR's Lander Control Center in Cologne, Germany. "Philae" mission was to land successfully on the surface of a comet, attach itself, and transmit data about the comet's composition. The "Rosetta" spacecraft and "Philae" lander were launched on an Ariane 5G+ rocket from French Guiana on 2 March 2004, 07:17 UTC, and travelled for 3,907 days (10.7 years) to Churyumov–Gerasimenko. Unlike the "Deep Impact" probe, which by design struck comet Tempel 1's nucleus on 4