Simulation of Galilean Satellites orbiting Jupiter | ESA/Hubble
Galileo used a telescope to discover that Jupiter had four moons orbiting it and made simulation is realistic in all important ways, and using it will give you a good The screen also displays the date, Universal Time (the time at Greenwich . Start the Revolutions of the Moons of Jupiter simulator (below) by entering the like the date and time of the observation, as well as the name of the moon. This simulation gives you a view from Saturn of Jupiter's system. The inner moons follow circular orbits around Jupiter interior to Io's orbit. They orbit in Jupiter's.
Even simple binoculars, if solidly mounted, will show the moons when they are well away from Jupiter, and the lowliest beginner's telescope will show all four in detail as they shift positions from night to night. Because the plane of the moons' orbits is close to the ecliptic, at least three of them pass in front of transit or behind occultation Jupiter in every orbit.
Callisto, the farthest moon from Jupiter, at certain times misses the planet and appears to pass over its north or south pole. When passing behind Jupiter, the moons also pass through Jupiter's mighty shadow, and so are eclipsed and invisible. These movements of Jupiter's moons, and the times of transits, occultations and eclipses, are predicted with great accuracy in the Royal Astronomical Society of Canada's "Observer's Handbook" each year. What to Watch for This Year ] While the moons are passing in front of Jupiter, they also cast their shadows on the planet's cloud deck below them.
These shadows may be observed with telescopes of at least 90mm aperture, provided Earth's atmosphere is steady. Sometimes two or even three shadows may pass across Jupiter's face at the same time, but never four.
Io, Jupiter's Moon
That's because the orbits of the four moons are in a mathematical relationship which prevents all four from lining up simultaneously. Over the next two months there are a number of times when two moon shadows can be observed at the same time.
Here are some dates and times to look out for double shadows: Monday, March 14, EDT Tuesday, March 22, EDT Wednesday, March 23, 7: EDT Tuesday, March 29, 3: EDT Tuesday, April 5, 5: EDT Saturday, May 7, Its mountains are much taller than those on Earthreaching heights of 16 kilometers 52, feet.
Io orbits closer to Jupiter's cloud tops than the moon does to Earth. This places Io within an intense radiation belt that bathes the satellite with energetic electrons, protons, and heavier ions. As the Jovian magnetosphere rotates, it sweeps past Io and strips away about 1, kilograms 1 ton per second of volcanic gases and other materials.
This produces a neutral cloud of atoms orbiting with Io as well as a huge, doughnut shaped torus of ions that glow in the ultraviolet. The torus's heavy ions migrate outward, and their pressure inflates the Jovian magnetosphere to more than twice its expected size. Some of the more energetic sulfur and oxygen ions fall along the magnetic field into the planet's atmosphere, resulting in auroras.
Simulation of Galilean Satellites orbiting Jupiter
Io acts as an electrical generator as it moves through Jupiter's magnetic field, developingvolts across its diameter and generating an electric current of 3 million amperes that flows along the magnetic field to the planet's ionosphere. This eerie view of Io was acquired by the Galileo spacecraft while the moon was in Jupiter's shadow.
Gases above the satellite's surface produce a ghostly glow that can be seen at visible wavelengths. The vivid colors are caused by collisions between Io's atmospheric gases and energetic charged particles trapped in Juiter's magnetic field. The green and red emissions are probably produced by mechanisms similar to those in Earth's polar regions that produce aurora. Bright blue glows mark the sites of dense plumes of volcanic vapor, and may be places where Io is electrically connected to Jupiter.
Io Discoveries On January 7, Galileo Galilei observed three pinpoints of light strung out in a line next to Jupiter. The next evening, these stars seemed to have moved the wrong way, which caught his attention. Galileo continued to observe the stars and Jupiter for the next week. On January 11, a fourth star Ganymede appeared. After a week, Galileo observed that the four stars never left the vicinity of Jupiter, appeared to be carried along with the planet, and changed their position with respect to each other and Jupiter.