Ptolemaic Solar System claudius ptolemy biography facts and pictures Ptolemaic System Solar

Ptolemaic Solar System claudius ptolemy biography facts and pictures Ptolemaic System Solar

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A little interesting about space life.

They are prominent in the shallow coastal waters of estuaries and harbors which explains their abundance in what is still an infant branch within the larger saltwater aquarium trade industry. Because they are common in both temperate and tropical waters, they can tolerate temperature ranges anywhere between 42-88 F (6-31 C). Although they can survive in brackish water, a salinity level (specific gravity) of 1.023 will mimic their native marine environment.



and here is another

When the astronomers measured variations in the light reflected off Nix and Hydra, they obtained the first clues of the Pluto system's chaos. When studying images obtained from HST between 2005 and 2012, the astronomers were surprised to find that the brightness changed unpredictably, rather than following a regular cycle. This weird discovery could only be explained by chaotic movement.



and finally

Of the four terrestrial, rocky planets of the inner Solar System (Mercury, Venus, our Earth, and Mars), both Mercury and Venus are moonless. Earth possesses one lone Moon, but it is a very large one--the fifth largest moon in our entire Solar System, in fact. Mars, on the other hand, has two tiny misshapen moons that resemble rocky potatoes, and are lumpy and dark, as they travel in their nearly circular orbits close to the plane of the Martian equator. The Martian moons, Phobos and Deimos, are probably asteroids that were captured by Mars long ago.

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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.



A moon is a natural body that orbits a planet, and is held in its orbit by the force of both the host planet's gravity and the gravity of the moon itself. Some planets sport moons; some do not. Most of the moons dwelling in our Solar System are frigid (and sometimes weird) little worlds, made up of ice and rock, that swarm around the outer giant, gaseous planets of our Sun's bewitching family--Jupiter, Saturn, Uranus, and Neptune. One example of such bewitching weirdness is the frozen, little icy moon Hyperion, of the ringed-planet Saturn, that looks like an icy natural sponge.



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!