- published: 11 Jul 2015
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Jet propulsion is thrust produced by passing a jet of matter (typically air or water) in the opposite direction to the direction of motion. By Newton's third law, the moving body is propelled in the opposite direction to the jet. It is most commonly used in the jet engine, but is also the favoured means of propulsion used to power various space craft.
A number of animals, including cephalopods, sea hares, arthropods, and fish have convergently evolved jet propulsion mechanisms.
Jet propulsion is most effective when the Reynolds number is high - that is, the object being propelled is relatively large and passing through a low-viscosity medium.
In biology, the most efficient jets are pulsed, rather than continuous: at least when the Reynolds number is greater than 6.
A jet engine is a reaction engine that discharges a fast moving jet of fluid to generate thrust by jet propulsion and in accordance with Newton's laws of motion. This broad definition of jet engines includes turbojets, turbofans, rockets, ramjets, pulse jets and pump-jets. In general, most jet engines are internal combustion engines but non-combusting forms also exist.
In March I had the opportunity to tour NASA Jet Propulsion Laboratory in Pasadena, California. I had been wanting to visit JPL for years, so I was thrilled! Many thanks to JPL's Roslyn Soto for being our tour guide for the afternoon. ♡ Instagram : https://www.instagram.com/michellemunteanu/ ۞ Twitter: https://twitter.com/meeshtangerine
http://www.nasa.gov/centers/glenn/about/fs21grc.html http://www.nasa.gov/centers/glenn/about/fs08grc.html Fan Funding : PayPal : arronlee33@hotmail.com. Thanks a lot for your support! :-)
NASA's Cassini spacecraft watched clouds of methane moving across the far northern regions of Saturn's largest moon, Titan, on Oct. 29 and 30, 2016. Read more at http://go.nasa.gov/2fnVoBw Saturn orbits the sun much farther than Earth, at a distance of about 888 million miles (1.4 million kilometers). For more information about the Cassini-Huygens mission visit http://saturn.jpl.nasa.gov and http://www.nasa.gov/cassini The Cassini imaging team homepage is at http://ciclops.org
Original air date: Oct. 20 at 7 p.m. PT (10 p.m. ET, 02:00 UTC/GMT) The ability to rove the surface of Mars has revolutionized NASA missions. With more advanced mobility, cliff faces, cave ceilings, and the surfaces of asteroids and comets could be explored. This talk will present the work of the Robotic Rapid Prototyping Lab at NASA's Jet Propulsion Laboratory. This includes grippers for NASA’s Asteroid Redirect Mission, which plans to extract a 15-ton boulder from the surface of an asteroid, and alter the asteroid’s orbit, a method that could prevent future impacts to the Earth. The talk will also present gecko-inspired adhesives currently being tested on the International Space Station, miniaturized robots that can drive across surfaces in zero gravity, and rock climbing robots travers...
Team members at NASA's Jet Propulsion Laboratory share the challenges of the Curiosity Mars rover's final minutes to landing on the surface of Mars.
What does BB-8 have in common with NASA Jet Propulsion Laboratory’s Curiosity Mars Rover? Watch and find out! #TheForceAwakens
2015 marks 50 years of successful NASA missions to Mars starting with Mariner 4 in 1965. Since then, a total of 15 robotic missions led by various NASA centers have laid the groundwork for future human missions to the Red Planet. The journey to Mars continues with additional robotic missions planned for 2016 and 2020, and human missions in the 2030s.
Join the Exploratorium crew on our trip to NASA's Jet Propulsion Lab (JPL) in Pasadena, California, to learn more about the Mars Science Laboratory mission and the Curiosity rover. Full details on Curiosity's mission on Mars and live webcasts on the mission at http://www.exploratorium.edu/mars.
JPL engineers are working on a small helicopter that could ‘scout’ a trail for future Mars rovers, but getting a chopper that could fly in the Martian atmosphere is tricky. Episode 2 of Crazy Engineering.
Original air date: September 22, 2016, at 7 p.m. PT (10 p.m. ET, 0200 UTC) After more than 12 years studying Saturn, its rings and moons, NASA's Cassini spacecraft has entered the final year of its epic voyage. The conclusion of the historic scientific odyssey is planned for September 2017, but not before the spacecraft completes a daring two-part endgame. This public talk presented highlights of Cassini’s ambitious inquiry at Saturn and an overview of science observations in the final orbits. There was a discussion of Cassini’s exciting challenges, and promise of the final year of the mission, ultimately flying through a region where no spacecraft has ever flown before. Speakers: Earl Maize, Cassini Project Manager, JPL Linda Spilker, Cassini Project Scientist, JPL For more about th...
Blum Room Toonami Preflight Episode #70: Jet Propulsion Laboratory
What does BB-8 have in common with NASA Jet Propulsion Laboratory’s Curiosity Mars Rover? Watch and find out! #TheForceAwakens
Coolest College Labs: Jet Propulsion Laboratory
Still photographs from the Jet Propulsion Laboratory (JPL) regarding the presence of alien life in our Solar System
BB-8 tours the Mars Yard at NASA's Jet Propulsion Laboratory with Amy Pham.
NASA Jet Propulsion Laboratory live stream of the Curiosity rover landing on Mars
Kevin Hand, Deputy Chief Scientist for Solar System Exploration, NASA Jet Propulsion Laboratory
NASA holds a news conference at the Jet Propulsion Laboratory to preview the arrival of the Dawn probe at Dwarf Planet Ceres.
Live From Jet Propulsion Laboratory. California Institute of Technology.
Dr. Ed Stone, Former Director of Jet Propulsion Laboratory (JPL) Project Scientist on Voyager, addressed members of the Los Angeles World Affairs Council over dinner at The Athenaeum at CalTech.
Exploring Space Lectures Presenter: Robert Pappalardo, Jet Propulsion Laboratory Jupiter's moon Europa may have an internal ocean of liquid water, plus the chemistry and energy life needs to exist. Robert Pappalardo, Europa Mission project scientist at the Jet Propulsion Laboratory, will discuss NASA’s plans to send a robotic mission to evaluate Europa’s potential for life and address one of humanity’s most fundamental questions: Are we alone in the universe? The Exploring Space lectures are made possible by the generous support of Aerojet Rocketdyne and United Launch Alliance.
NASA's Jet Propulsion Laboratory in Pasadena, Calif. hosts a briefing for media following the Curiosity rover's successful landing in Gale Crater on the Red Planet.