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A little interesting about space life.

However, Neptune is wacky. This giant gaseous world has only a small number of moons when compared to the other three gaseous giant planets in our Sun's outer realm: Jupiter, Saturn, and Uranus. Of the quartet of giant planets that inhabit our Sun's outer kingdom, Jupiter and Saturn are classified as gas-giants, while Uranus and Neptune are ice-giants. While all four planets are enormous in size, Jupiter and Saturn are much larger than Uranus and Neptune, and possess much more massive gaseous envelopes. The ice-giants, Uranus and Neptune, are smaller, contain larger solid cores, and sport less massive gaseous envelopes than their two gas-giant planet kin.



and here is another

The Kuiper Belt, sometimes called the Edgeworth-Kuiper Belt, is a region located in our Solar System's outer limits beyond the realm of the eight major planets. It extends from the orbit of Neptune to approximately 50 AU. Neptune's average distance from our Sun is about 30.1 AU--its perihelion is 29.8 AU, while its aphelion is 30.4 AU.



and finally

Most of the moons dwelling in our Sun's family were probably born from primordial disks of dust and gas, orbiting around newly formed planets, when our Solar System was very young about 4.5 billion years ago. There are at least 150 moons circling the planets in our Solar System--and about 25 moons are currently awaiting official confirmation of their discovery.

More information:

Kepler-22b's initial transit in front of the face of its fiery star was seen by Kepler on its third day of scientific observations, back in May 2009. The third passage was spotted in late 2010. Still more confirming evidence was provided by the infrared Spitzer Space Telescope, as well as by ground-based 'scopes. The confirmation of the existence of this interesting extrasolar planet world was announced on December 5, 2011.



Planetary scientists usually calculate the Moon's age by using the radioactive decay of elements like uranium, explained Dr. John Chambers in the April 2, 2014 National Geographic News. Dr. Chambers is a planetary scientist at the Carnegie Institution for Science in Washington, D.C. By studying an element with a recognized decay rate, and knowing its concentration in Moon rocks or the Earth's surface, scientists are able to calculate back in time to when the material first formed. However, there are numerous and varying radioactive materials that can provide differing timelines, added Dr. Chambers, who was not involved in the study.



This new method is based on the fact that elements composing our planet's crust that have a tendency to combine with iron--such as iridium and platinum--arrived at Earth after this last giant collision.