Rosetta Stone Rosetta Stone The Rosetta Stone is a granodiorite stele, found in 1799, inscribed with three versions of a decree issued at Memphis, Egypt in 196 BC during the Ptolemaic dynasty on behalf of King Ptolemy V. The top and middle texts are in Ancient Egyptian using hieroglyphic script and Demotic script, respectively, while the bottom is in Ancient Greek. As the decree has only minor differences between the three versions, the Rosetta Stone proved to be the key to deciphering Egyptian hieroglyphs, thereby opening a window into ancient Egyptian history. The stone, carved during the Hellenistic period, is believed to
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