Good evening fellow stargazers!
Earlier this evening a couple hours after sunset, I was able to capture the Waxing Gibbous Moon and Jupiter, along with the four visible moons of the largest planet in our Solar System. The photos came out beautifully and captured all of the heavenly bodies perfectly.
The largest planet of our solar system, Jupiter, has about 80 known moons in total. Of these about 57 are officially named with the further 23 awaiting confirmation and naming by the International Astronomical
Union.
These moons orbiting Jupiter form a satellite system which is called the Jovian System.
The largest of these moons are the four Galilean moons: Io, Europa, Ganymede, and Callisto, which were independently discovered on January 8, 1610 by European astronomers Galileo Galilei and Simon Marius and were the first celestial objects found to orbit a body that was neither the Earth or the Sun.
 |
A composite image of photographs of the four Galilean Moons shows (from left to right): Io, Europa, Ganymede, and Callisto. Image courtesy of NASA/JPL/DLR. |
The four Galilean Moons are Jupiter's inner moons with regular orbits, while the rest of the smaller outer moons are
on irregular orbits. The
Galileans are also round moons, while the other Jovians have irregular
shapes -- some of them possibly captured asteroids rather than true
moons.
All
the other smaller Jovian moons measure at less than 160 miles (250
kilometers) in diameter, with about 60 of the smaller satellites
measuring less than 6.2 miles (10 kilometers) in diameter making them
virtually invisible from the surface of the Earth even with a good
telescope.
Io
is the innermost Galilean moon with a diameter of 2,260 miles (3,640
km) and a rotation period of 1.8 days around Jupiter at a distance of 262,200 miles (422,000 kilometers).
Europa
is the smallest of the Galilean moons with a diameter of 1,940 miles
(3,100 km) and a rotation period of 3.6 days around Jupiter at a
distance of 417,000 miles (671,000
kilometers).
Ganymede is the
largest of the Galilean moons, and the largest
moon in the Solar System with a diameter of 3,270 miles (5,260
kilometers) and a rotation of 7.2 days around Jupiter at a distance of
665,000 miles (1,070,000 kilometers).
Callisto
is the outermost of the Galilean moons, and the second largest moon of
Jupiter with a diameter of 2,995 miles (4,820 km) and a rotation period
of 16.7 days around Jupiter at a distance of 1,170,000 miles (1,883,000
kilometers).
With a good camera lens, a telescope, or a pair of
good binoculars its possible to view these moons if you know where and
when to look for them. To help identify the exact locations of the Galilean
Moons, this blogger uses the outstanding astronomy website skyandtelescope.org as a reference source. I highly recommend this site to other amateur stargazers.