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  1. Aprender
Para adolescentes y adultos curiosos

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Gravedad, leyes de Kepler, elementos orbitales, velocidades, escape, la ecuación del cohete y cómo viajan las naves espaciales entre mundos.

NASA/JPL/Space Science Institute

  1. La gravedad de Newton

    • Newton's gravity · 12 min

      One law explains falling apples, the Moon's orbit and the path of every planet. Fire Newton's cannon and find out how.

  2. Las leyes de Kepler

    • Kepler's laws · 14 min

      Three rules found from careful observations in the early 1600s still describe every orbit, from moons to exoplanets.

  3. Elementos orbitales

    • Orbital elements · 14 min

      Six numbers pin down any orbit in space: its size, shape, tilt, orientation and where the body is on it.

  4. Velocidad orbital: la ecuación vis-viva

    • Orbital speed: the vis-viva equation · 12 min

      One short equation gives the speed of anything in orbit at any point, if you know how far it is and the size of its orbit.

  5. Velocidad de escape

    • Escape velocity · 12 min

      How fast do you need to go to leave a world for good? And why rockets do not actually need to reach it at the surface.

  6. Por qué una órbita es una caída

    • Why an orbit is a fall · 10 min

      Astronauts float not because there is no gravity up there, but because they are falling all the time, and missing.

  7. Alcanzar la órbita: el giro de gravedad

    • Reaching orbit · 12 min

      Why rockets go up for only a few seconds, then spend ten minutes going sideways: the gravity turn, staging and orbital insertion.

  8. La ecuación del cohete y delta-v

    • The rocket equation and delta-v · 12 min

      Why rockets are mostly fuel, why they come in stages, and the one equation behind every mission's budget.

  9. Traspasos de Hohmann

    • Hohmann transfers: changing orbits · 12 min

      To go higher you speed up, and then you arrive slower. The two-burn manoeuvre that moves satellites from low orbit to geostationary orbit.

  10. Lanzamiento de ventanas

    • Launch windows: the road to Mars · 12 min

      You cannot aim at Mars, only at where Mars will be in eight months. Why Mars missions leave every 26 months, all at once.

  11. Inserción orbital: ser capturado

    • Orbital insertion: getting captured · 12 min

      Arriving at a planet is the most dangerous minute of a mission: one burn decides whether you stay or fly past forever.

  12. La gravedad ayuda

  13. Puntos de Lagrange

    • Lagrange points: balance in the sky · 11 min

      Five places around every pair of worlds where a spacecraft can ride along for free, and why the James Webb Space Telescope lives at one of them.

  14. Rendezvous y atraque

    • Rendezvous: catching the space station · 11 min

      To catch something ahead of you in orbit, you drop lower and go slower-looking but faster. The counter-intuitive art of meeting in space.

  15. Volviendo a casa: reentrada

    • Coming home: reentry · 11 min

      A small push slows a spacecraft by a hundred metres per second, and the air takes care of the other 7.8 kilometres per second, as a fireball.

  16. Parcelas de porcino

    Coming soon »

  17. Asteroides y cometas

    Coming soon »

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