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SpaceAstronomer Alfonso Fernandez
Lives in London
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The Witch Head Nebula
Image Credit & Copyright: Jeff Signorelli
http://apod.nasa.gov/apod/ap151030.html

Double, double toil and trouble; Fire burn, and cauldron bubble .... maybe Macbeth should have consulted the Witch Head Nebula. A suggestively shaped reflection nebula, this cosmic crone is about 800 light-years away though. Its frightening visage seems to glare toward nearby bright star Rigel in Orion, just off the right edge of this frame. More formally known as IC 2118, the interstellar cloud of dust and gas is nearly 70 light-years across, its dust grains reflecting Rigel's starlight. In this composite portrait, the nebula's color is caused not only by the star's intense bluish light but because the dust grains scatter blue light more efficiently than red. The same physical process causes Earth's daytime sky to appear blue, although the scatterers in planet Earth's atmosphere are molecules of nitrogen and oxygen.
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We've come a long way from the first days when Clyde W. Tombaugh's grainy images of the ninth planet teased our imaginations. 
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Supernova 'Crime Scene,' Shows a Single White Dwarf to Blame: Astronomers have determined the pre-explosion mass of a white dwarf star that blew up thousands of years ago. The measurement strongly suggests the explosion involved only a single white dwarf, ruling out a well-established alternative scenario involving a pair of merging white dwarfs. Details: http://go.nasa.gov/1Ds5jyG 
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The  NASA/ESA Hubble Space Telescope has imaged phantom objects near dead quasars - ethereal green objects which mark the graves of these objects that flickered to life and then faded.

http://sci.esa.int/hubble/55732-hubble-finds-ghosts-of-quasars-past-heic1507/


+Hubble Space Telescope +NASA  #galaxy   #quasars  
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Join us for the shortest lunar eclipse of the century happening tomorrow at 6:16am ET. Details: http://go.nasa.gov/1NMIs2p
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Chandra Flashback of the Day – N63A: Celestial Illumination: The X-Ray Glow From An Exploded Star 
http://chandra.harvard.edu/photo/2003/n63a/
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Thanks to the Cassini mission, a great deal has been learned about Saturn’s system of moons (aka. the Cronian system) in the past decade. Thanks to the presence of an orbiter in the system, astronomers and space exploration enthusiasts have been treated…
Thanks to the Cassini mission, a great deal has been learned about Saturn’s system of moons (aka. the Cronian system) in the past decade. Thanks to the presence of an orbiter in the system, astrono…
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Hubble View: Smoke Ring for a Halo

Two stars shine through the center of a ring of cascading dust in this image taken by the NASA/ESA Hubble Space Telescope. The star system is named DI Cha, and while only two stars are apparent, it is actually a quadruple system containing two sets of binary stars.

Learn more: http://go.nasa.gov/1SdbxpF
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Congratulations to everyone involved in +NASA New Horizons from all of us in Europe! A new horizon indeed! #Plutoflyby

http://solarsystem.nasa.gov/news/display.cfm?News_ID=49503

Credit: NASA/John Hopkins University of Applied Physics Laboratory/Southwest Research Institute
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Astronomers Observe a 4-Star System as it Forms http://bit.ly/1Ar2n2a
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Six Galaxy Clusters: Dark Matter is Darker Than Once Thought
http://chandra.si.edu/photo/2015/dark/

These galaxy clusters are part of a large study using Chandra and Hubble that sets new limits on how dark matter—the mysterious substance that makes up most of the matter in the Universe—interacts with itself. The hot gas that envelopes the clusters glows brightly in X-rays detected by Chandra (pink). When combined with Hubble’s visible light data, astronomers can map where the stars and hot gas are after the collision, as well as the inferred distribution of dark matter (blue) through the effect of gravitational lensing.
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NASA's Scott Kelly and Russian cosmonaut Mikhail Kornienko will launch on a one-year mission to the International Space Station on March 28, 2015.
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Computer Science
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Astronomy & Space / Astronomía y Espacio
Introduction
SpaceAstronomer. Alfonso Fernandez-Barandiaran BSc in Physics, Computer Science specialist & amateur astronomer. Astronomy, Space, Astronomía, Espacio
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Currently
London
Previously
Frankfurt - Bilbao - Madrid