Syzygy Astronomy regulus star notes approaching syzygy or pole to pole Astronomy Syzygy

Syzygy Astronomy regulus star notes approaching syzygy or pole to pole Astronomy Syzygy

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It is important to know at any age!

Though the moon has no atmosphere on the outside, the caves are filled with 'air' well suited to supporting the respiratory needs of life forms. Surprisingly, 90% percent of the moon's internal atmosphere comprises oxygen which exceeds the corresponding oxygen proportion in the earth's atmosphere.

and here is another

Neptune is circled by only 14 moons, a considerably smaller number than Jupiter's 70. Also, most of Neptune's moons are extremely small. Triton, however, is an exception. In fact, Triton harbors 99.7% of the mass of Neptune's entire system of moons combined. The second-largest irregular moon in our Solar System, Phoebe of Saturn, sports only about 0.03% of Triton's mass. It is thought that Triton was snared by its adopted parent-planet some time after Neptune had already formed a system of moons. This means that the capture of the wandering Triton was likely a catastrophic event for Neptune's original moons, disrupting their orbits, and causing them to blast into each other--thus creating a rubble disc.

and finally

"Their motion is tied together in a way similar to that of three of Jupiter's large moons. If you were sitting on Nix, you would see Styx go around Pluto twice every time Hydra goes around three times," Dr. Hamilton commented in the June 3, 2015 HST Press Release.

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When these photos were taken, it was full daylight on the Moon. Because there is only an extremely thin atmosphere on the Moon,the sky appears black. In addition, sunlight at the Moon's surface was incomparably strong with the starlight; the stars simply faded in comparison with the sun. If the astronauts used sufficiently long exposures, stars would, indeed, be visible.

Discovering the water content of volcanic deposits on our Moon using orbital instruments presents quite a challenge. Planetary scientists use orbital spectrometers to measure the light that skips off of a planetary surface. By determining which electromagnetic wavelengths of light are reflected or absorbed by the surface, the scientists can then get an idea of which minerals and other compounds are present.

Most of the moons of our Solar System are icy little desolate and dead worlds, dwelling in the dark, cold stillness of those regions far from the warmth and light of our Sun. However, a few of these small bodies may not be lifeless. For example, Europa of Jupiter may have a subsurface global ocean of liquid water secreted beneath its cracked, jumbled frozen crust of ice. This subsurface ocean might be warmed by tidal flexing into a hospitable, life-friendly liquid-water state, where primitive life-forms may swim around in the deep-sea darkness beneath Europa's ice. In addition, the second-largest moon in our Solar System, Titan of Saturn, possesses an environment that is eerily similar to that of our own planet long before life evolved out of the lifeless ooze (prebiotic). Big, lazy raindrops of liquid hydrocarbons float to the surface of this tormented, frigid moon, forming seas and lakes composed of methane and ethane that play the same role as water on Earth. It is entirely possible that life, as we do not know it, can evolve and flourish using liquids other than water. The largest moon of our Solar System, Ganymede of Jupiter, is larger than the innermost planet Mercury. Like its sister-moon Europa, Ganymede may hold secreted, beneath its surface crust of ice, a global ocean of liquid water. The little icy moon, Enceladus of Saturn, spews out geysers of water mixed with ammonia (which plays the role of antifreeze) from its so-called "tiger stripes". Therefore, Enceladus could also harbor life-loving water hidden beneath its icy surface.