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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 ...
Europa Clipper (previously known as Europa Multiple Flyby Mission) is a space probe developed by NASA to study Europa, a Galilean moon of Jupiter. It was launched on October 14, 2024. [ 15 ] The spacecraft will use gravity assists from Mars on March 1, 2025, [ 10 ] and Earth on December 3, 2026, [ 11 ] before arriving at Europa in April 2030 ...
Europa Lander: 2025–2030 Space Launch System or a commercial rocket NASA: Lander In progress Would depend on the Europa Clipper to select a landing site and assess radiation levels. Once landed, it would search for biosignatures and authenticate and determine the proximity of liquid water. 4 Europa Orbiter: Europa Orbiter: 2003 Space Shuttle ...
These lenses are used for UV photography, as the quartz glass can be transparent at much shorter wavelengths than lenses made with more common flint or crown glass formulas. Fused quartz can be metallised and etched for use as a substrate for high-precision microwave circuits, the thermal stability making it a good choice for narrowband filters ...
Isaac Newton suggests the existence of an aether in the Third Book of Opticks (1st ed. 1704; 2nd ed. 1718): "Doth not this aethereal medium in passing out of water, glass, crystal, and other compact and dense bodies in empty spaces, grow denser and denser by degrees, and by that means refract the rays of light not in a point, but by bending them gradually in curve lines? ...
The reddish-brown color of the markings is theorized to be caused by sulfur, but because no data collection devices have been sent to Europa, scientists cannot yet confirm this. [39] Europa is primarily made of silicate rock and likely has an iron core. It has a tenuous atmosphere composed primarily of oxygen. [40]
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Trying to find a complete and precise definition of singularities in the theory of general relativity, the current best theory of gravity, remains a difficult problem. [ 1 ] [ 2 ] A singularity in general relativity can be defined by the scalar invariant curvature becoming infinite [ 3 ] or, better, by a geodesic being incomplete .