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Showing posts with the label space

Space based solar power [ in vacuum ]

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A solar panel reaps only a small portion of its potential due to night, weather, and seasons, simultaneously introducing intermittency so that massive storage is required to make solar power work at a large scale. A perennial proposition for surmounting these impediments is that we launch solar collectors into space—where the sun always shines, clouds are impossible, and the tilt of the Earth’s axis is irrelevant. On Earth, a flat panel inclined toward the south averages about 5 full-sun-equivalent hours per day for typical locations, which is about a factor of five worse than what could be expected in space. More importantly, the constancy of solar flux in space reduces the need for storage—especially over seasonal timescales. I love solar power. And I am connected to the space enterprise. Surely putting the two together  really  floats my boat, no? No. I’ll take a break from writing about behavioral adaptations and get back to Do the Math roots with an evaluation of solar power from

Kepler-22b, our first planet in the habitable zone of a Sun-like Star

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The   Kepler Science Conference   is happening Dec 5 through 9.   Recordings of conference presentations may be found on the  Conference Sessions/Schedule page See: 2011 Dec 5 Press Conference video on YouTube Published paper:  Kepler-22b: A 2.4 Earth-radius Planet in the Habitable Zone of a Sun-like Star NASA News Release Press Conference Slides  (PDF, 17.61 MB) Press Conference Slides  (Power Point, 17.73 MB) Press Kit page Diagrams This image is an artist's conception of planet Kepler-22b, a planet known to comfortably circle in the habitable zone of a sun-like star. It is the first planet that NASA's Kepler mission has confirmed to orbit in a star's habitable zone -- the region around a star where liquid water, a requirement for life on Earth, could persist. The planet is 2.4 times the size of Earth, making it the smallest yet found to orbit in the middle of the habitable zone of a star like our sun. Scientists do not yet know if the planet has a predominan

APOLLO 16 ASTRONAUTS FOUND ALIEN SHIP

Milky Way or Galaxy

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  Milky Way or Galaxy  The Milky Way or Galaxy with a capital G, is the name given to our galaxy. Aged 12 billion years, it has been there since the beginning of the universe. Our galaxy contains a set of 200 billion stars and probably a huge amount of dark matter. Together by their gravitational forces.  Galaxies are of three types: elliptical, spiral, irregular. The Milky Way is a spiral. The Hubble Space Telescope regularly sends pictures which show the diversity of galaxies.  Our city is really huge star. This is a huge spiral of stars wheel with a diameter of approximately 100 000 light years. Light takes 100 000 years to cross the Milky Way. It appears that the Earth is a continuous white band of the Milky Way.  Our galaxy is composed of three spiral arms (Sagittarius arm, the arm of Orion and Perseus arm). Its mass is 10 11  kg or 2x10 41  solar masses.  The center of our galaxy is occupied by a black hole, as many galaxies.  The Large and Small Magellanic Cloud gala