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Wikiverse: a galactic reimagining of Wikipedia

Wikiverse: a galactic reimagining of Wikipedia
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wikistream Mars's Water Is Evaporating Away Even Faster Than We Expected Billions of years ago, Mars could have been a planet very like Earth with copious liquid water on its surface. But over time, that water rose into Mars’s thin atmosphere and evaporated off into space. There are only very small amounts of water vapor left in the atmosphere today, and a new study shows that vapor is being lost even faster than previously believed. The research, published in the journal Science, used data from the Trace Gas Orbiter in orbit around Mars to see how water moved up and down through the layers of the Martian atmosphere in order to understand how fast it evaporates away. When the atmosphere becomes supersaturated, this makes the evaporation of water happen even faster. “This implies that the potential for water to escape from Mars is higher than previously thought,” the authors conclude. This could mean that planned manned missions to Mars will be more difficult. Editors' Recommendations

Internet Archive: Digital Library of Free Books, Movies, Music & Wayback Machine Astronomers Do It In The Dark - astrophotography, astronomical photos, astronomical photography, astro photos, astro photography, Dark Nebulae, IC Nebulae, Reflection Nebulae, Open Clusters, Abell Galaxies, Spiral Galaxies, Galaxy Clusters, Planetary Nebu accueil: Universalis Junior Astronomers Just Identified Another Important Aspect of Planets That Could Host Life We are, by now, pretty familiar with the concept of the Goldilocks zone. Also known as the habitable zone, it's the distance from a star at which liquid water can be present on the surface on a planet - not so hot as to be vaporised, nor so cold as to be frozen. These conditions matter because we count liquid water as a vital ingredient for life. But it's not the only criterion that can help us to assess a planet's potential habitability; according to new research based on decades of data, there are also Goldilocks stars. Not all stars, you see, are built alike. Our Sun sits between these two extremes, what is known as a yellow dwarf - a G-type main-sequence star. Nope. "K-dwarf stars are in the 'sweet spot,' with properties intermediate between the rarer, more luminous, but shorter-lived solar-type stars (G stars) and the more numerous red dwarf stars (M stars)," explained Villanova astronomer and astrophysicist Edward Guinan. (NASA/ESA/Z.

Britannica.com The Importance of Yods in Astrology A “yod” is an aspect pattern that some astrologers use. It involves two planets in a close sextile (60°), with a third planet ‘quincunx’ (150°) to both of the planets in sextile. Click here to view a full-sized diagram of a yod. The truth about yods is that they aren’t terribly important, or at least not as much as they are made out to be by some people. In fact, I would go so far as to say that the yod is one of the most over-hyped configurations in astrology, at least relative to its actual merit. Yods are often given all sorts of lofty sounding titles, like “the finger of god”, or “the finger of fate”. The Quincunx The ‘quincunx’ is not an aspect. The Visual Component of Aspects In modern times we are accustomed to thinking of aspects simply as geometrical distances, but that is not the entire story. Affinities Between Signs This is where the signs come in, and this is the crucial piece that is missing from the modern dialogue about the aspects. Johannes Kepler and Modern Aspect Theory

Encyclopédie Universalis Astronomy Answers: Coincidence Periods Loading [MathJax]/jax/output/CommonHTML/fonts/TeX/fontdata.js 1. Introduction At least 2500 years ago astronomers in Babylon discovered that solareclipses and lunar eclipses often recur under similar circumstances after 223 synodical months (counted according to the phases of the Moon, not according to the western calendar) or about 6585⅓ days. This period is nowadays called the saros. To get a solar eclipse or lunar eclipse, two independents series of periodic phenomena must come together, namely the proper phase of the Moon (New Moon for a solar eclipse, or Full Moon for a lunar eclipse) and passage of the Moon through a node of the orbit of the Moon around the Earth. 2. We study the coming together of two different periodic phenomena A and B. PAPB=γ′=ab with a and b whole numbers. If an A and a B happen at the same time then we get the combination phenomenon Z. In our example, Z is a solar eclipse or lunar eclipse. We can associate each A with a prediction series. s≡ak+s0(modb) 3. c=PAδ

Wikipédia, l'encyclopédie libre Astronomy Answers: Eclipses and the Saros 1. Lunar Eclipses A lunar eclipse occurs when the Moon passes through the shadow of the Earth. For more basic information about lunar eclipses, see the Eclipses Page from the AstronomyAnswerBook. If the Moon stands opposite the Sun in the sky then it is Full Moon. There is only a lunar eclipse if the Moon, when it is full, is also close enough to the ecliptic. There are on average 29.530588 days between a Full Moon and the next Full Moon, and on average 13.606111 days between one passage through a node of the Moon's orbit and the next one. It turns out that 223 synodical months is nearly equal to 242 draconic months, namely both almost equal to 6585 1/3 days or about 18 years and 11 days. During a lunar eclipse, the Moon gets dark, and everyone who can see the Moon then can see the lunar eclipse. 2. Here is a method to predict eclipses of the Moon yourself. 2.1. To help you along, here is a table that shows the dates and saros numbers of the first Full Moon of the years 2003 − 2010.

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