... Jet Propulsion Laboratory (JPL, USA) . Royal Technological Institute (KTH, Sweden) . National Science Foundation (NSF, USA) . ... Ephemeris of Jet Propulsion Laboratory . Ephemeris of Celestial Mechanics Institute (Longitudes Bureau, Paris) . ...
... the comet formed due to twisting of a powerful jet of gas and dust ejected from the ... area (volcano or geyser), from which a powerful jet of gas and dust is continuously ...