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Gamescom is a trade fair for video games held annually at the Koelnmesse in Cologne, Germany. It is organised by the Bundesverband Interaktive Unterhaltungssoftware (Federal Association of Interactive Entertainment Software). It is used by many video game developers to show off their upcoming games and game-related hardware. Gamescom is the world's largest games event with 275,000 visitors, more than 4,400 journalists and 550 exhibitors from 40 countries attending the show in its third year...

Outer space (often simply called space) is the void that exists beyond any celestial body including the Earth. It is not completely empty (i.e. a perfect vacuum), but contains a low density of particles, predominantly hydrogen plasma, as well as electromagnetic radiation, magnetic fields, and neutrinos. Theoretically, it also contains dark matter and dark energy...

A POTD is an acronym for "Photo of the Day", "Picture of the Day", "Post of the Day" or "Poll of the Day". It is a term most commonly used by online digital photography communities as an honor to outstanding photos that are selected daily from among that community's membership. They can either be tagged as POTD or displayed in a special page on that site...