The Solar System formed 4. 6 billion years ago from the gravitational collapse of a giant interstellar molecular cloud. The vast majority of the system’s mass is in the Sun, with the majority of the remaining mass contained in Jupiter. The four smaller inner planets, Mercury, Venus, Earth and Mars, are terrestrial planets, being primarily composed of rock and metal. The four outer planets are giant planets, being substantially more massive than the terrestrials. The two largest, Jupiter and Saturn, are gas giants, being composed mainly of hydrogen and helium; the two outermost planets, Uranus and Neptune, are ice giants, being composed mostly of substances with relatively high melting points compared with hydrogen and helium, called volatiles, such as water, ammonia and methane. All eight planets have almost circular orbits that lie within a nearly flat disc called the ecliptic.
The GRAIL mission determined the internal structure of the Moon in great detail for nine months during 2012. Armed with this the new information, GRAIL astronomers were able to redefine the sizes of the largest impact basins on the lunar surface.
The Waxing of the moon, is the period that runs between the New Moon and the Full Moon. The influence it carries during this time is wonderful for building, gathering or creating new things. The waxing moon is a great time to start new projects, sign up for a course, be creatively expressive, anything related to generating new aspects of life, or recreating the old.
GRAIL Mission Puts A New Face On The Moon! Scientific investigation into the origin of lunar impact basins has been hampered because there is a general lack of agreement on their size. The majority of the largest impact basins pock-mark the near-side of the Moon (the Moon's enchanting "face"), and have also been filled in by gushing lava streams. These lava streams have covered up, and rendered invisible, important clues pertaining to the shape of the land.