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  2. Europa (moon) - Wikipedia

    en.wikipedia.org/wiki/Europa_(moon)

    Europa's gravity is approximately 13% of Earth's. The temperature on Europa varies from −160 °C at the equator, to −220 °C at either of its poles. [145] Europa's subsurface ocean is thought to be significantly [clarification needed] warmer however. It is hypothesized that because of radioactive and tidal heating (as mentioned in the ...

  3. Europa Clipper - Wikipedia

    en.wikipedia.org/wiki/Europa_Clipper

    The high-gain antenna operates on X-band frequencies of 7.2 and 8.4 gigahertz, and a Ka-band frequency of 32 gigahertz (12 times that of a typical cell phone).The antennas will be used to research gravity and radio science, allowing researchers to learn more about Europa's gravity [88] It was designed and constructed by a team led by Matt Bray ...

  4. Simplified perturbations models - Wikipedia

    en.wikipedia.org/.../Simplified_perturbations_models

    This set of models is often referred to collectively as SGP4 due to the frequency of use of that model particularly with two-line element sets produced by NORAD and NASA. These models predict the effect of perturbations caused by the Earth’s shape, drag, radiation, and gravitation effects from other bodies such as the sun and moon.

  5. NASA plans for launch of Europa Clipper: What to know ... - AOL

    www.aol.com/nasa-plans-launch-europa-clipper...

    Ahead of the spacecraft is a 1.8 billion-mile journey to Europa on a trajectory taking it past Mars and then Earth, using the planets’ gravity as a slingshot to add speed for the trek.

  6. Timeline of Galileo (spacecraft) - Wikipedia

    en.wikipedia.org/wiki/Timeline_of_Galileo...

    The perijove reduction campaign began; it involved incremental changes in the closest approach to Jupiter carried out over four Callisto encounters (C20–C23). The campaign was designed to set up flybys of Io, the Galilean moon closest to Jupiter. C21 1,047 (650) 30 June 1999 NIMS studied the trailing edge of Callisto.

  7. Findings by dark energy researchers back Einstein's ... - AOL

    www.aol.com/news/findings-dark-energy...

    Gravity is one of the universe's fundamental forces. Einstein's theory linked space, time and gravity. It holds that concentrations of mass and energy curve the structure of space-time ...

  8. Hill sphere - Wikipedia

    en.wikipedia.org/wiki/Hill_sphere

    [4] [verification needed] A more complex example is the one at right, the Earth's Hill sphere, which extends between the Lagrange points L 1 and L 2, [clarification needed] which lie along the line of centers of the Earth and the more massive Sun. [not verified in body] The gravitational influence of the less massive body is least in that ...

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    Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!