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A little interesting about space life.
Looking inward from Triton, there are seven regular moons, all of which display prograde orbits in planes that are situated close to Neptune's equitorial plane, and some of these small moons orbit within Neptune's rings. It is thought that these seven small moons were re-accreted from the rubble ring that formed after Neptune snared Triton. This would have occurred some time after Triton's orbit had become circular. In addition, Neptune is circled by six more outer irregular moons other than Triton, including Nereid, whose orbits are considerably farther from Neptune and at high inclination: A trio of these moons sport prograde orbits, while the remainder have retrograde orbits. Indeed, Nereid has an unusually close and eccentric orbit for an irregular moon. This suggests that Nereid may have once been a regular moon that was badly disturbed and nudged into its current position when Triton was snared by Neptune's gravity. The duo of outermost Neptunian irregular moons, Psamathe and Neso, have the largest orbits of any natural satellites known in our Solar System to date.
and here is another
The Waving Flag. According to this argument, frequently cited by the people who think that the moon landings were nothing more but a hoax, is that the star-spangled banner of the United States of America seemed to wave and flutter as Neil Armstrong planted it to the ground. This wouldn't have been much of an issue except for the fact that there is virtually no atmosphere on the moon, and therefore no wind whatsoever to have such an effect on any flag.
Kepler-22b sports an orbital period of approximately 200 days. Its inclination is about 90 degrees, and it transits in front of the face of its star as observed by Earth-based astronomers. The shape of Kepler-22b's orbit is unknown, but it is known that its average orbital distance is well within its parent star's habitable zone. Many extrasolar planets are known to sport highly elliptical (football-shaped) orbits, and if Kepler-22b also travels along such a path around its star, it would only spend a tiny fraction of its time within this Goldilocks zone. This would cause the planet to undergo such extreme variations in temperature that it would not be a pleasant place for delicate living things to evolve and flourish. Kepler-22b is approximately 2.4 times the radius of Earth.
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Triton is the largest of Neptune's 13 moons. It is an unusual world, twirling around its planet in the wrong direction. Many astronomers think that some time in the remote past, Triton was nudged out of its home in the Kuiper Belt, and during its wanderings in the darkness of interplanetary space, at last swept close enough to Neptune to feel the irresistible lure of that planet's gravity. As Neptune drew Triton into its gravitational embrace, that luckless wanderer from the Kuiper Belt underwent a sea-change from a comet-like denizen of our Solar System's outer limits, to a moon of one of the major planets. So, there Triton whirls around in its new home, circling its planet Neptune, but circling it backwards. And like all moons, it is now a dependent of its parent planet. As a matter of fact, the moon was given the name of Triton as an allusion to the demigod Triton's dependence on the sea-god Neptune in Greek mythology.
But ongoing studies about lunar chemistry are showing that it may be much wetter than planetary scientists initially hypothesized. In fact, these wetter conditions conflict with some aspects of the Giant Impact theory.
Crida and Charnoz tested their new model to find out whether it could be applied to other planets in addition to Saturn. Their investigation has brought to light several valuable facts. This scenario for moon-birth from planet-rings succeeds in offering an explanation as to why the largest moons dwell farther away from their parent planet than the smaller moons. It further explains the gathering of moons close to the Roche limit--their birthplace--on the outermost fringes of the rings. This distribution is in agreement with what is seen in the Saturn-system. The same scenario can also apply to the moons of other giant planets, such as the ice-giants Uranus and Neptune. The Uranus-system and the Neptune-system are also organized in a similar way. This discovery suggests that long ago, when these planets were young, they also sported impressive rings like those of Saturn--which ultimately vanished when their moons were born. Finally, this scenario can also explain the formation of Earth's Moon, and the moons of the dwarf planet Pluto. According to Crida and Charnoz's calculations, under special circumstances a single moon--like Earth's own--can be born from a primordial ring around its planet. This may well have occurred in both the case of Earth's single large Moon, and for Pluto's largest moon, Charon.