Sentences with phrase «planetary radius»
"Planetary radius" refers to the measurement of the size or distance from the center to the outer edge of a planet. It tells us how big a planet is, similar to how we measure the distance from the center of a circle to its outer edge. Full definition
Slow rotation requires that both the Rossby deformation radius and the Rhines length exceed planetary radius, which occurs for planets with rotation rate > 20 days.
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We compare the transit duration distribution for different subsets of Kepler planet candidates and discuss tentative trends with planetary radius and multiplicity.
In fact the magnetic dipole is shifted from the center of the planet towards the south rotational pole by as much as one third of the planetary radius.
Their models showed that if you visited any star with a planet orbiting from the same distance as Earth down to one tenth that, there is about a 38 percent chance (and likely less) that you would run into a planet and moon system similar to Jupiter's four Galilean satellites (Io, Europa, Ganymede and Callisto), with similar ratios of moon to planetary diameters and orbital to planetary radii.
By the team's figuring, the core extends 2030 kilometers from the center of Mercury, or 83 % of the planetary radius; Earth's core is only 55 % the size of the whole planet.
Its moon (if it is indeed one) orbits at a distance between 17.2 to 21.2 times the planetary radius, or 747,000 to 922,000 miles.
Rhines rotators are expected for planets with rotation rate between 5 to 20 days, where the Rhines length is less than planetary radius but the Rossby deformation radius is greater than planetary radius.
The rapid rotation regime is defined by the Rossby deformation radius being less than planetary radius, which occurs for planets with rotation rate < 5 days.
At stake here is the minimum planetary magnetic field needed to retain an atmosphere (Kay and team believe a magnetosphere twice the size of the planetary radius is necessary).
Extending to about 85 percent of the planetary radius, this core larger than previous estimates.
They examined how the orbital distances of their final sample are related to the planetary mass and / or the planetary radius, depending on which measurements are available.
The transition to superrotation occurs under conditions in which equatorward propagating Rossby waves generated by baroclinic instability at intermediate and high latitudes are suppressed, which will occur when the deformation radius exceeds the planetary radius.