Hubble 15 Years of Discovery hubble 15 years of discovery educational material esa Discovery of Hubble 15 Years

Hubble 15 Years of Discovery hubble 15 years of discovery educational material esa Discovery of Hubble 15 Years

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A little interesting about space life.

Because of the many similarities between Triton and Pluto, it has long been thought that there is some sort of historical connection between them. Indeed, it was once proposed that Pluto is really an escaped moon of Neptune, but this is now thought to be improbable. It is now considered to be much more likely that Triton, like Pluto, orbited our Sun freely, but was unlucky enough to be snared by Neptune--whereas Pluto was left independent and free to wander at will within its distant birthplace.



and here is another

Clearly, Triton is a bizarre moon-world, circling its giant parent-planet in the wrong direction. As Triton wandered away from its birthplace in the Kuiper Belt, during its journey through the darkness of interplanetary space, it at last ventured close enough to Neptune to feel the powerful lure of its gravitational embrace. As Neptune drew its adopted moon-child closer and closer, the frigid wanderer from afar experienced a sea-change from a comet-like inhabitant of the Kuiper Belt, to a moon of one of the major planets in our Solar System. So, now, Triton inhabits its new home, orbiting the planet Neptune, but orbiting it backwards. And like all moons, wherever they may be, it is now a dependent of its parent-planet. Indeed, Triton was given its name as an allusion to the demigod Triton's dependence on the sea-god Neptune in Greek mythology.



and finally

University of Miami psychologist Arnold Lieber states a possible link between the fact that the human body is made up of nearly 80% water to the possibility that we experience "biological tides" effecting our emotions during different phases of the moon, the same as the oceanic tides are effected by the moon's activity.

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"These two bodies whirl around each other rapidly, causing the gravitational forces that they exert on the small nearby moons to change constantly. Being subject to such varying gravitational forces makes the rotation of Pluto's moons very unpredictable. The chaos in their rotation is further intensified by the fact that these moons are not neat and round, but are actually shaped like rugby balls," explained Dr. Douglas Hamilton in the June 3, 2015 HST Press Release. Dr. Hamilton is of the University of Maryland in College Park, and co-author of the study.



The first observations of Mars as an object traveling in Earth's night sky was recorded by the ancient Egyptian astronomers, and by 1534 BCE the ancient astronomers were familiar with the retrograde movement of the planet. By the time of the Neo-Babylonian Empire, the Babylonian astronomers were making regular records of the positions of the planets, as well as systematic detections of their behavior. In the case of Mars, the ancient astronomers realized that it made 42 circuits of the zodiac every 79 years. These scientists of long ago even invented arithmetic methods so that they could make minor corrections pertaining to the predicted positions of the planets inhabiting our Solar System. The ancient astronomers referred to the planets as "wandering stars".



The research published in the July 4, 2016 issue of Nature Geoscience highlights the main factor differentiating moon-birth around Mars and Earth: the differing rotation speeds of the two planets prompted "completely different tidal actions," Dr. Charnoz explained in the July 4, 2016 CNRS Press Release. Dr. Charnoz proposes that at the time of their respective impacts, "Earth took less than four hours to spin on its axis whereas Mars rotated very slowly over a 24-hour period." The result of this important difference caused Earth to hold on to its single, large Moon, while the Martian collision created a dozen smaller moons alongside a larger moon. As time went by, Martian tidal action--resulting from the planet's slow rotation rate--caused most of the moons, including the largest one, to crash back down to the surface of their parent-planet. As a result, only the two most distant moons, Phobos and Deimos, survived as testimony to the ancient catastrophe.