Vor der ersten Sekunde des Universums
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How Earth Was Born: The Quick Story

How Earth Was Born: The Quick Story | Vor der ersten Sekunde des Universums | Scoop.it
The straight story of how Earth began, as today's geologists tell it.
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From the accretion of the Earth to the differentiation of the Ameralik dyke source. : The elusive Hadean enriched reservoir revealed by 142Nd deficits in Isua Archaean rocks : Nature : Nature Publi...

From the accretion of the Earth to the differentiation of the Ameralik dyke source. : The elusive Hadean enriched reservoir revealed by 142Nd deficits in Isua Archaean rocks : Nature : Nature Publi... | Vor der ersten Sekunde des Universums | Scoop.it
The first indisputable evidence for very early differentiation of the silicate Earth came from the extinct 146Sm-142Nd chronometer. 142Nd excesses measured in 3.7-billion-year (Gyr)-old rocks from Isua (southwest Greenland) relative to modern terrestrial samples imply their derivation from a depleted mantle formed in the Hadean eon (about 4,570-4,000[thinsp]Gyr ago). As dictated by mass balance, the differentiation event responsible for the formation of the Isua early-depleted reservoir must also have formed a complementary enriched component. However, considerable efforts to find early-enriched mantle components in Isua have so far been unsuccessful. Here we show that the signature of the Hadean enriched reservoir, complementary to the depleted reservoir in Isua, is recorded in 3.4-Gyr-old mafic dykes intruding into the Early Archaean rocks. Five out of seven dykes carry 142Nd deficits compared to the terrestrial Nd standard, with three samples yielding resolvable deficits down to -10.6 parts per million. The enriched component that we report here could have been a mantle reservoir that differentiated owing to the crystallization of a magma ocean, or could represent a mafic proto-crust that separated from the mantle more than 4.47[thinsp]Gyr ago. Our results testify to the existence of an enriched component in the Hadean, and may suggest that the southwest Greenland mantle preserved early-formed heterogeneities until at least 3.4[thinsp]Gyr ago.
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Origen del Sistema Solar

Origen del Sistema Solar | Vor der ersten Sekunde des Universums | Scoop.it
Tras la explosión de las primeras Supernovas, el espacio se llenó de polvo y metales, y de ellos se formaron nuevas estrellas y planetas.
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Galaxies, Galaxy Information, Galaxy Facts, News, Photos -- National Geographic

Galaxies, Galaxy Information, Galaxy Facts, News, Photos -- National Geographic | Vor der ersten Sekunde des Universums | Scoop.it
Get information, facts, photos, news, videos, and more about galaxies from National Geographic.
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Cumulos, nebulosas y galaxias

Cumulos, nebulosas y galaxias | Vor der ersten Sekunde des Universums | Scoop.it
Observación de nuestros cielos, constelaciones, estrellas, planetas, eclipses, galaxias.
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The Life Cycle of Stars - YouTube

Explains how we believe stars are born, live and die and the different ends to different sized stars. Learn even more on Teaching Astronomy on iop.org: http:...
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The Beginning of Everything -- The Big Bang - YouTube

How did everything get started? Has the universe a beginning or was it here since forever? Well, evidence suggests that there was indeed a starting point to ...
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La Historia de la Tierra - Geología Historica - YouTube

Un resumen de los 4800 Ma que tiene de formada la tierra, en solo 11 minutos. Historia y evolución de la Tierra, desde su concepción hasta nuestros días, des...
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The Birth Of The Moon - AWESOME HQ VIDEO! - YouTube

Our Moon was formed when Theia, a celestial body the size of Mars, collided with Earth 4.5 Billion years ago. The resulting debris formed our Moon. Do you lo...
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Birth of the Solar System - YouTube

The Solar System's birth was far from peaceful. Witness the spectacular explosion known as the "Big Bang". Naked Science: Birth of the Solar System : TUES NO...
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La Nube Grande de Magallanes « La bitácora de Galileo » Astronomía elemental

La Nube Grande de Magallanes « La bitácora de Galileo » Astronomía elemental | Vor der ersten Sekunde des Universums | Scoop.it
Cuando Fernando de Magallanes zarpaba del puerto de Sevilla, el 10 de agosto de 1.519, no sólo iniciaba la que habría de ser primera vuelta a nuestro planeta, demostrando así de forma práctica y fehaciente la esfericidad de la Tierra, sino que también partía hacia cielos desconocidos para los 234 marineros que componían la tripulación […]
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La vida de las Estrellas - La Historia En linea

La vida de las Estrellas - La Historia En linea | Vor der ersten Sekunde des Universums | Scoop.it
En un mundo lejano, el color el Sol se oscurecerá gradualmente. Se volverá naranja y, después, rojo. Crecerá hasta que sus capas exteriores lleguen hasta la misma órbita de la Tierra. Las estrellas no son eternas: nacen y mueren. Actualmente, nuestro Sol tiene unos 5000 millones de años y deberán pasar otros 5000 millones antes …
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The First Stars of the Universe --Major Discovery Announced by MIT

The First Stars of the Universe --Major Discovery Announced by MIT | Vor der ersten Sekunde des Universums | Scoop.it
The birth of the first stars is one of these important moments in the history of the universe, says Robert Simcoe, Associate Professor of Physics at MIT.
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