europa's atmosphere consists of oxygen.
also, under it's icy surface, is an ocean of liquid water.
Europa is the smallest of the Galilean satellites.
Europa is bright in relation to the other of Jupiter's moons due to it having an ice surface, ice is a reasonably good reflector compared to other materials meaning more light is reflected back to the earth, making it brighter than the other, dark surfaced moons.
Io, Ganymede, Callisto and Europa are it's moons but apart from size difference, the distance from Jupiter is the main difference.
There are four Galilean moons, so named because they were discovered by Galileo. They are comparartively large compared to the other Jovian moons, so they were visible from Earth as companions to the planet. They are Ganymede, Callisto, Europa, and Io.
According to the Wikipedia article on Io, it seems that Io doesn't have much water - on the other hand, some of the other moons of Jupiter have quite a lot of water. Europa probably does have a lot water under its surface.
Europa is the smallest of the Galilean satellites.
Io, Ganymede, Callisto and Europa are the 4 major moons, but there are about 60 other known smaller ones.
The first moons discovered to orbit a body other than the Earth, they were discovered by Galileo Galilei in 1610. Their names are Io, Europa, Ganymede, and Callisto.
Io, Ganymede, Callisto and Europa are it's moons but apart from size difference, the distance from Jupiter is the main difference.
Europa is bright in relation to the other of Jupiter's moons due to it having an ice surface, ice is a reasonably good reflector compared to other materials meaning more light is reflected back to the earth, making it brighter than the other, dark surfaced moons.
The Galilean moons are Io, Europa, Ganymede, and Callisto, all of which orbit Jupiter. The term "Galilean" does not denote anything special about the moons other than that they were discovered by the astronomer Galileo Galilei.
There are four Galilean moons, so named because they were discovered by Galileo. They are comparartively large compared to the other Jovian moons, so they were visible from Earth as companions to the planet. They are Ganymede, Callisto, Europa, and Io.
According to the Wikipedia article on Io, it seems that Io doesn't have much water - on the other hand, some of the other moons of Jupiter have quite a lot of water. Europa probably does have a lot water under its surface.
They do. Six of the eight planets in the solar system have moons and five of them have large moons. If you are asking why no planet has moons exactly like those of Jupiter, each moon has its own unique history, often interacting with its neighboring moons. So no two moons are alike.
what makes the heart different to the other organs
The moon, and moons of the other planets (Titan, Europa, Ganymede, Phobos etc). But the planets themselves, even Earth is natural satellites to the Sun.
Europa and the other three Galilean moons display characteristics that suggest they formed as planetesimals during the early solar system, becoming satellites of the larger clump that became Jupiter. Europa appears to be mainly silicate rocks like those of the Earth and the Moon. The possibility of a liquid ocean beneath a thick ice crust is what makes Europa intriguing for the search for other life forms in the solar system. Tidal forces from its rotation may have melted subsurface ice layers, creating a liquid layer. The surface, exposed to space, remains frozen as rock-hard ice about 10 to 30 kilometers thick.