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Interesting facts about space.
Oxygen isotopes on the Earth and Moon measure the same according to the specimens gathered from the Moon, meaning that the Earth and Moon did indeed form at the same distance from the Sun. Finding a theory that could satisfy all three of these specific facts would prove to be rather difficult. There have been three major theories about how the moon was created that have been discounted. Below we will discover what each of these three theories proposed and why they were deemed to be unlikely or impossible. The Fission Theory. The Fission Theory proposes that the Moon was created in the early history of our solar system when something caused the Earth to break apart and a large part of the Earth was cast into space which eventually formed into the Moon. This idea supported the fact that the Earth and Moon share similar mantles, but where this theory falls apart involves the actual physics it would take to create such a scenario. The amount of angular momentum and energy required to create this situation would make the current placement of the Earth and Moon next to impossible. Thus, the fission theory has been deemed incorrect. The Capture Theory. The Capture Theory contends that the Moon came to be obtained by the Earth after it formed in a different location in the solar system, shedding light on the Moon's different composition. There are a couple problems with this scenario. Since we know that the Earth and Moon have the same oxygen isotopes on their surfaces, therefore meaning they would have the same amount of baking from the Sun, it doesn't explain how the Moon would have encountered the extra baking on its surface. The physics behind this call for a lot of specific things to happen, such as the Moon entering Earth's gravitational speed at just the right speed, at just the right distance to allow for the current set-up. Not only would it have to approach the Earth with these two requirements, but there would also have to be something that could slow the Moon down., however, capture into the Moon's present orbit is very improbable. Something would have to slow it down with just the right gravitational pull to cause the Moon to fall into Earth's orbit. While complicated, this could have been possible, but it is very unlikely. The Co-Formation Theory.
and here is another
o understand the lunar phases you should first observe the changes of the shapes of the moon and when it appears so. The moon's figure is formed through reflection of sunlight from the Sun then shining onto the Earth's surface. The moon phases are a great portion of the study considering the series of movement is what makes the moon a unique object in the universe. In fact during the ancient days, it was the moon that plays the role as a time reference and prediction for best fishing times. Due to the moon and its benefits, people noticed the changes of the moon's figure, conducted researches and concluded many things.
Titan is the largest moon of the gas-giant planet Saturn, as well as the second-largest moon in our entire Solar System--after Jupiter's enormous Ganymede. Indeed, this smoggy orange moon is almost as big as the planet Mars! Because Titan is situated in the outer domain of our Solar System, circling Saturn--which is the sixth major planet from our Star, the Sun--it is extremely cold, and its chemical atmosphere is frozen. This very interesting atmosphere is composed of a mix of compounds that many astronomers think are comparable to those that existed in our own planet's primordial atmosphere. Titan's strange, dense, orange atmosphere contains large quantities of "smoggy" hydrocarbons. This very heavy shroud of obscuring smog is so extremely dense that it showers "gasoline-like" rain down on the tortured surface of this distant moon-world.
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Until 1610, when Galileo Galilei discovered the quartet of large Galilean moons orbiting Jupiter--Io, Europa, Ganymede, and Callisto--Earth's Moon was the Moon, because it was the only moon known to exist. Now, we know differently. There are over 100 known moons in our Solar System alone, and probably many, many more, circling distant alien planets belonging to the families of stars beyond our Sun. Most of the moons in our own Solar System are relatively small, icy worldlets that contain only small amounts of rocky material. The faraway multitude of sparkling, frozen moons that inhabit our Sun's family are mostly found circling the quartet of outer gaseous giant planets--Jupiter, Saturn, Uranus, and Neptune. In this dimly lit region, far from our Star's heat and light, these tiny icy moons perform a strange and lovely ballet around their large, gaseous host planets. The quartet of giant gaseous planets, that inhabit our Solar System's outer suburbs, are enshrouded by heavy atmospheres of gas, and they are accompanied in their travels around our Sun, by their own orbiting entourage of moons and moonlets.
Following that last giant impact, Earth put on some weight, but this new weight gain was derived from impacts of much smaller bodies, only about the size of asteroids like Vesta. Dr. Jacobson and his team used the later weight gain in order to determine when the unfortunate Theia struck.
Most of Saturn's natural satellites are very small and icy dancing moonlets. However, the larger, icy midsized moons twirl around their enormous ringed planet in a lovely and mysterious dance. The largest of the icy moons is Rhea, Saturn's second-largest moon after the weird world that is Titan. Iapetus, the third largest of Saturn's moons, is two-faced, with one side composed of gleaming, very bright, highly reflective ice, and the other, dark and non-reflective, a blackened splotch staining the pristine white ice. Iapetus is larger than Mimas and Enceladus. There is an enormous impact crater on the moon Mimas, that stands out as a prominent feature on what is apparently a badly bombarded, heavily cratered world. The large impact crater Herschel on this 400-kilometer moon was excavated by a tumbling chunk of space-stuff made of rock, ice, or both, that came very close to powdering the entire little moon. Another icy moon, Enceladus, is a bewitching world, 500-kilometers in diameter, that is thought to harbor a global subsurface ocean beneath its frozen crust. Where there is liquid water there is always the possibility--though, by no means, the promise--of life. Enceladus also has the highest albedo of any other moon in our Solar System. This means that it has the most dazzlingly bright reflective surface. It also possesses a very active geology, rendering it almost free of craters because it is constantly being resurfaced by the emissions of gushing icy geysers that are responsible for fresh snow that keeps the surface of the little moon sparkling and smooth.