NASA Ganymede nasa confirms jupiter39s moon ganymede has an underground Ganymede NASA

NASA Ganymede nasa confirms jupiter39s moon ganymede has an underground Ganymede NASA

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A little interesting about space life.

Kepler-22b is an extrasolar planet that circles Kepler-22, a G-type star that is situated about 600 light-years from our own planet in the constellation Cygnus. This intriguing new world, that resides beyond our Solar System, was first spotted by NASA's highly productive, though ill-fated, Kepler Space Telescope in 2011. Kepler-22b has the distinction of being the first known transiting extrasolar planet to reside within the so-called habitable zone of its star. The habitable zone is the term used to describe that Goldilocks region around a star where water can exist in its life-loving liquid state. Planets dwelling in this fortunate region are not too hot, not too cold, but just right for water and, hence, life to exist. A planet that circles its star in the habitable zone suggests that there is the possibility--though not the promise--of life as we know it to exist on that world.

and here is another

The beautiful, banded, blue ice-giant planet, Neptune, is the furthest major planet from the Sun. It is also orbited by a very weird large moon that may not have been born a moon at all. The moon, Triton, is about 1,680 miles in diameter, and sports features that eerily resemble those found on the dwarf planet Pluto. Pluto is a denizen of the Kuiper Belt. The Kuiper Belt is a reservoir of comets and other icy bodies--some large, some small--that circle around our Sun beyond the orbit of Neptune, at a distance of about 30 to 55 Astronomical Units (AU) from our Star. One AU is equal to the average distance of Earth from the Sun--approximately 93,000,000 miles.

and finally

However, the crater's shallow basin and tall surrounding mountain peaks may be whispering the precious secret that the subsurface ice was warm enough to collapse and fill the deep hole created by the impact.

More information:

Very long ago, when our Solar System was young, Earth's Moon possessed active volcanoes. However, today, the lunar volcanoes are dormant and have not erupted for millions of years.

The two scientists found clear evidence of water in nearly all of the large pyroclastic deposits that had been mapped earlier across our Moon's surface, including deposits near the Apollo 15 and 17 landing sites where the water-bearing glass bead samples were collected.

Several theories have been around for a long time that have attempted to explain how Earth's Moon was born. The first theory suggests that the Moon was once part of Earth, and that it somehow budded off about 4.5 billion years ago. According to this theory, the Pacific Ocean basin is the most likely site for where this occurred. A second theory postulates that the interaction of Sun-orbiting and Earth-orbiting planetesimals (the ancient building-blocks of planets), in the early years of our Solar System, caused them to disintegrate. Earth's Moon then coalesced out of the shattered debris of the pulverized planetesimals. A third theory proposes that the Earth and Moon were born together out of the original nebula that gave rise to our Solar System, and a fourth theory suggests that the Moon was really born somewhere else in our Solar System, and was ultimately captured by Earth's gravity when it traveled too close.