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Interesting facts about space.
When Apollo 11 landed on the Moon in 1969, we were presented with our first human contact with the moon. The mission was able to accomplish the task of not only landing on the Moon, but also to return to the Earth with samples from the Moon. These samples along with subsequent presented us with answers regarding the composition of the Moon, which also gave us some basic facts that any theory about how the moon was created must answer/address. We learned:The Moon does not contain an iron core like our Earth does, due to the fact that the Moon's density is only 3.34 grams per cubic centimeter (compared to the Earth's which is 5.52 grams per cubic centimeter).Samples collected from the surface of the Moon reveal that it underwent extreme heat and baking, much more than what the Earth experienced.
and here is another
Our third theory to discuss is the "Co-Formation Theory" which alleges that the Moon and Earth were formed within the nebular disk around the Earth (similar to how our solar system formed around the Sun). This theory falls short when one revisits the composition of the Earth and Moon. If the Moon did indeed share some of the same building material as the Earth did and form in the same area, it should be very similar in composition to the Earth. We've seen, however, that the Moon doesn't share a significant iron core like our home planet does. There is one theory which remains to be discussed, and it is the one that is widely accepted today. The Giant Impactor Theory: The Giant Impactor Theory claims that the Moon was formed when an object the size of Mars slammed into the Earth shortly after the solar system's formation. After this object hit the Earth, tons of material from both the object and the Earth were sent into space and began to orbit around the Earth. This material slowly began to come together and collide until what we see as our Moon was created. This theory most easily explains the criteria we previously mentioned. The heat that would have been generated after the collision explains the evidence of "baking" on the Moon's surface. It also supports the fact that the Moon doesn't have a large iron core like the Earth. Finally, we have seen evidence of other such collisions in other parts of the solar system.
In addition to the Giant Impact theory, there are several other models that have been proposed to explain how our Moon was born. One alternative model to the Giant Impact scenario suggests that Earth's Moon was once a part of our planet that simply budded off when our Solar System was in its infancy--approximately 4.5 billion years ago. According to this model, the Pacific Ocean basin would be the most likely cradle for lunar birth. A second model proposes that our Moon was really born elsewhere in our Solar System and, like the duo of tiny potato-shaped Martian moons, was eventually snared by the gravitational tug of a major planet. A third theory postulates that both Earth and Moon were born at about the same time from the same protoplanetary accretion disk, composed of gas and dust, from which our Sun's family of planets, moons, and smaller objects ultimately emerged.
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"A late Moon-forming event, as suggested by our work, is very consistent with an identical Earth and Moon," Dr. Jacobson told Space.com.
According to this theory, the Saturn system began with a family of several relatively large moons, analogous to the four large Galilean moons of Jupiter--Io, Europa, Ganymede, and Callisto. However, strange and violent things happened in the Saturn system that drove its large moons onto a collision course with destiny. According to the theory, there were a few dramatic moon mergers, forming the Titan that we now know--but there was also a sufficiently large quantity of moon-stuff left over from the collisions to create the icy mid-sized satellites--Mimas, Iapetus, Enceladus, Tethys, Dione, and Rhea!
Songs, poems, odes, reveries. The Moon has been the subject of endless adoration since the beginning of time. Mysterious and changeable, sometimes occulted by clouds or (gasp!) the Earth itself, our satellite, our iridescent child, the Moon floats suspended in the sky, enticing us to dream, to wonder, to reflect. To garden in the moonlight, to walk in the woods with the moon shining through foliage or bare branches, whenever we have the chance to have her silvery light embrace us we know we are being touched by the hand of the divine feminine and we are blessed.