Three of Jupiter’s four Galilean moons are putting on a show tonight. You’ll find the giant planet high in the southwest an hour after sunset. Observers in the eastern half of the U.S. will catch all four moons around 7:30 P.M. EST: Ganymede lies far to the west, while Io (...
kg/m3) which shows that Pratt isostasy is unlikely to be a major compensation mechanism of Mercury's topography. Assuming Airy isostasy, I find the best fit value for Mercury's mean crustal thickness is 26 ± 11 km, 25% lower than the most recently reported and previously thinnest number....
whereL0is the constant theoretical Sommerfeld value (L0 = 2.44 × 10–8WΩ K−2) of the Lorenz number (L). The value ofLis specific to each metal and metallic-alloy and has been shown to beP- andT-dependent for Fe48. The Lorenz number can be determined from first-principle ca...
If the moon is visible, the ecliptic will pass within 5 degrees of it. You can refer to your app to see whether the moon is above or below it. (Full moons always rise as the sun sets, pinning both ends of the ecliptic.) Bright planets will add more points of reference. Mars and ...
number of known moonsnone At first glance the surface of the planet looks similar to the cratered terrain of theMoon, an impression reinforced by the roughly comparable size of the two bodies. Mercury is far denser, however, having a metallic core that takes up about 61 percent of its volu...