Another sight to look for is a star masquerading as a slightly brighter, out-of-place Galilean satellite
. Chi ([square]) Leonis was only 7' south of Jupiter back on April 8th.
The giant world reaches western quadrature (90[degrees] west of the Sun) on December 14th, so all month it casts its shadow farthest to the side, improving our view of many Galilean satellite
These and other details proved to be a good follow-up to the Galilean satellite
observations he made in 1849-50.
The stately world reaches east quadrature, 90[degrees] east of the Sun, on August 6th, permitting improved views of eclipses of the Galilean satellites
(see page 51 for a listing of specific events).
Due to a recent, rare orbital alignment between Io and Europa - another of Jupiter's four largest moons, together called the Galilean satellites
- astronomers could observe the largest lava lake on Io with unprecedented detail.
These so-called Galilean satellites
, named after the 17th century scientist Galileo Galilei, who discovered them with a telescope, complete orbits around Jupiter with durations ranging from 2 days to 17 days.
Your telescope becomes a super-long, super-aperturt telephoto lens, enabling you to take wonderfully detailed close-ups of the Moon's surface or show Jupiter as a disk with two dark bands accompanied by its four bright Galilean satellites
Europa is one of the four largest moons of Jupiter, which collectively are known as Galilean satellites
. They were discovered by Galileo in 1610.
While at Durham, Prof Sampson's research included studying the motions of Jupiter''s four Galilean satellites
, work for which he later won the Gold Medal of the Royal Astronomical Society in 1928.
jjGoogling a runner Moons Of Jupiter 2.15 Navan Jupiter has 63 confirmed moons, with the four largest called the Galilean satellites
after Italian astronomer Galileo Galilei, who discovered them in 1610.
The arrangement of the Galilean satellites
around Jupiter is governed by the same regularity as the arrangement of planets around the Sun, i.e., the closer they are to the planet, the higher their densities are.