Astrophysics moon

?XI.It is named after the mythological Epimetheus

Or Galilean satellites

Are the four largest moons of Jupiter:

1. Io
2. Europa
3. Ganymede

And Callisto.They are the most readily visible Solar System objects after the unaided visible Saturn

The dimmest of the classical planets

Allowing observation with common binoculars

Even under night sky conditions of high light pollution.The invention of the telescope enabled the discovery of the moons in 1610.Through this they became the first Solar System objects discovered since humans have started tracking the classical planets

And the first objects to be found to orbit a planet other than the Earth.

Janus is an inner satellite of Saturn.It is also known as Saturn X.It is named after the mythological Janus.

The two moons of Mars are Phobos and Deimos.They are irregular in shape.Both were discovered by American astronomer Asaph Hall in August 1877 and are named after the Greek mythological twin characters Phobos and Deimos who accompanied their father Ares into battle.Ares

Was known to the Romans as Mars.

The planet Neptune has 14 known moons

Which are named for minor water deities in Greek mythology.By far the largest of them is Triton

Discovered by William Lassell on October 10

17 days after the discovery of Neptune itself.Over a century passed before the discovery of the second natural satellite

1. Nereid
2. In 1949

And another 40 years passed before Proteus

Neptune's second largest moon

Was discovered in 1989.Neptune's outermost moon Neso

Which has an orbital period of about 27 Julian years

Orbits farther from its planet than any other moon in the Solar System.

The seventh planet of the Solar System

Most of which are named after characters that appear in

The works of William Shakespeare and Alexander Pope.Uranus's moons are divided into three groups:

1. Thirteen inner moons
2. Five major moons

And nine irregular moons.The inner and major moons all have prograde orbits

While orbits of the irregulars are mostly retrograde.