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    Category Astronomy/Space

    Cosmic Dust that formed our Planets traced to Giant Stars

    January 31, 2017, Categories  Astronomy/Space

    Schematic of the internal structure of AGB stars at the interface between the H-burning region and the convective envelope.

    Schematic of the internal structure of AGB stars at the interface between the H-burning region and the convective envelope.

    Scientists have identified the origin of key stardust grains present in the dust cloud from which the planets in our Solar System formed, a study suggests. Researchers have solved a long-standing puzzle concerning the source of the grains, which formed long before our Solar System and can be recovered from meteorites that fall to Earth. The stars that produced the dust were identified by observing how key reactions shaped the make-up of the grains, scientists say.

    During their lifetime, stars around six times larger than the Sun – called Asymptotic Giant Branch or AGB stars – blow off their outer layers, forming an interstellar cloud of gas and dust grains...

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    1st-ever GPS data release to boost Space-Weather science

    January 31, 2017, Categories  Astronomy/Space

    An image illustrating the six orbital planes in which GPS satellites (“navigational satellites,” or ns) fly around Earth. This configuration shows the orbits just before the start of this solar cycle’s biggest geomagnetic storm, which occurred on March 17, 2015. The darkest orbital lines indicate the position of the satellites in that moment; the lightest lines indicate where they were 12 hours prior.

    An image illustrating the six orbital planes in which GPS satellites (“navigational satellites,” or ns) fly around Earth. This configuration shows the orbits just before the start of this solar cycle’s biggest geomagnetic storm, which occurred on March 17, 2015. The darkest orbital lines indicate the position of the satellites in that moment; the lightest lines indicate where they were 12 hours prior. An image illustrating the six orbital planes in which GPS satellites (“navigational satellites,” or ns) fly around Earth. This configuration shows the orbits just before the start of this solar cycle’s biggest geomagnetic storm, which occurred on March 17, 2015...

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    Both Push and Pull Drive our Galaxy’s Race through Space

    January 30, 2017, Categories  Astronomy/Space

    Both push and pull drive our Galaxy’s race through space

    Push and pull: Illustration by Daniel Pomarède shows the Shapley Attractor and the Dipole Reppeler.

    Although we can’t feel it, we’re in constant motion: the earth spins on its axis at about 1,600 km/h; it orbits around the sun at about 100,000 km/h; the sun orbits our Milky Way galaxy at about 850,000 km/h; and the Milky Way galaxy and its companion galaxy Andromeda are moving with respect to the expanding universe at roughly 2 million km/h (630 km/s). But what is propelling the Milky Way’s race through space?

    Until now, scientists assumed that a dense region of the universe is pulling us toward it, in the same way that gravity made Newton’s apple fall to earth...

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    Substantial evidence of Holographic Universe

    January 30, 2017, Categories  Astronomy/Space

    A sketch of the timeline of the holographic Universe. Time runs from left to right. The far left denotes the holographic phase and the image is blurry because space and time are not yet well defined. At the end of this phase (denoted by the black fluctuating ellipse) the Universe enters a geometric phase, which can now be described by Einstein's equations. The cosmic microwave background was emitted about 375,000 years later. Patterns imprinted in it carry information about the very early Universe and seed the development of structures of stars and galaxies in the late time Universe (far right). Credit: Paul McFadden

    A sketch of the timeline of the holographic Universe. Time runs from left to right. The far left denotes the holographic phase and the image is blurry because space and time are not yet well defined. At the end of this phase (denoted by the black fluctuating ellipse) the Universe enters a geometric phase, which can now be described by Einstein’s equations. The cosmic microwave background was emitted about 375,000 years later. Patterns imprinted in it carry information about the very early Universe and seed the development of structures of stars and galaxies in the late time Universe (far right). Credit: Paul McFadden

    A UK, Canadian and Italian study has provided what researchers believe is the first observational evidence that our universe could be a vast and complex hologram...

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