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The sizes and masses of many of the moons of Jupiter and Saturn are fairly well known due to numerous observations and interactions of the Galileo and Cassini orbiters; however, many of the moons with a radius less than ~100 km, such as Jupiter's Himalia, have far less certain masses. [5]
[5]: 2850 To compare, the radius of J1407b's disk is roughly 200 times larger than that of Saturn's E Ring, [c] and lies between the orbital radii of Mercury (0.39 AU) and Venus (0.72 AU). [18] J1407b's circumplanetary disk or ring system has been frequently compared to that of Saturn's, which has led popular media outlets to dub it as a "Super ...
Saturn has 146 known moons, 63 of which have formal names. [12] [11] It is estimated that there are another 100 ± 30 outer irregular moons larger than 3 km (2 mi) in diameter. [98] In addition, there is evidence of dozens to hundreds of moonlets with diameters of 40–500 meters in Saturn's rings, [99] which are not considered to be true moons.
For the past few months, Saturn's rings have been appearing thinner and thinner to those using ground telescopes. By March 2025, the rings will disappear entirely from view, according to Earth Sky ...
In the Prutenic Tables the astronomers found Jupiter and Saturn so close to each other that Jupiter covered Saturn [20] (actual angular separation was 6.8 minutes on 25 August 1563 [2]). The Alfonsine tables suggested that the conjunction should be observed on another day but on the day indicated by the Alfonsine tables the angular separation ...
NASA’s James Webb Space Telescope has captured its first near-infrared observation of Saturn, highlighting details in the planet’s atmosphere and rings.
Saturn and Jupiter may be gas giants now, but according to some experts, they were once nothing more than tiny pebbles, and a recent study supports that assertion. The prevailing theory is that ...
The James Webb Space Telescope (JWST) is a space telescope designed to conduct infrared astronomy.As the largest telescope in space, it is equipped with high-resolution and high-sensitivity instruments, allowing it to view objects too old, distant, or faint for the Hubble Space Telescope. [9]