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Interesting facts about space.
Europa, an icy little moon that circles the giant planet Jupiter, probably sustains a global ocean of liquid water beneath a tortured, shattered icy crust. For a long time, weird and jumbled regions of ice disruption, called "chaos terrains", were seen only on Europa, and their origins remained cloaked in mystery. But astronomers now think that the "chaos terrains" formed as the result of a subsurface liquid saltwater lake, equal to all of the Great Lakes on Earth combined. Hidden about 1.9 miles beneath Europa's cracked eggshell-like frozen crust, the ice-embedded lake may be one of the latest potentially habitable environments discovered so far in our Solar System.
and here is another
"This is still very much an area of active research, so there is much that scientists including our Department of Terrestrial Magnetism staff scientist Erik Hauri, as well as many other Carnegie colleagues and alumni, are figuring out about how much water exists on the Moon. This is a highly important and challenging question to answer given that we have limited knowledge on the history and distribution of lunar water," explained Dr. Miki Nakajima in a February 26, 2018 Carnegie Institution Press Release. Dr. Nakajima, who is of the Carnegie Institution of Washington (D.C.), along with California Institute of Technology's (Caltech's) Dr. David Stevenson, set out to determine whether prevailing lunar formation models need to be adjusted to explain more recent higher estimates of the quantity of water on Earth's Moon. Caltech is in Pasadena.
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.
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The astronomer Tycho Brahe, during the 17th century, measured the diurnal parallax of Mars that Johannes Kepler had used in order to make a preliminary calculation of the relative distance to the Red Planet. When the earliest telescopes to be used for astronomical purposes finally became available, the diurnal parallax of Mars was measured again in an attempt to determine the distance between our Sun and Earth. Giovanni Domenico Cassini was the first to make this measurement in 1692--but the early parallax measurements were hindered by the primitive quality of the instruments. The only occultation of Mars by the planet Venus was observed on October 13, 1590, by Michael Maestlin at Heidelberg. In 1610, Mars was viewed by the great astronomer Galileo Galilei, who was the first to make use of a primitive telescope for astronomical purposes. The Dutch astronomer Christiaan Huygens was the first to draw a map of Mars that showed terrain features.
The new study was published in the April 3, 2014 issue of the journal Nature, and it may provide a solution to a long-standing mystery of lunar origins pertaining to why Earth and its lovely companion appear to sport virtually identical compositions.
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.