Tuesday, January 31, 2017
INSCRIPCIONES CURSOS ASTRONOMIA 2017 //// ASOCIACIÓN AMIGOS DEL OBSERVATORIO Y PLANETARIO DE ROSARIO //// ARGENTINA
Lunes 6 de febrero se inician las inscripciones a cursos anuales.
Consultas
Los esperamos !!
VENUS, LA LUNA Y MARTE DESDE ROSARIO - ARGENTINA //// FOTOS: ESMERALDA SOSA 31-01-2017
PARA VER IMAGENES EN HD ABRIR SIGUIENTE LINK
Monday, January 30, 2017
FERMI SEES GAMMA RAYS FROM FAR SIDE SOLAR FLARES
SUBTITULOS EN INGLES EN LA OPCION CLOSED CAPTION
An international science team says NASAs Fermi Gamma-ray Space Telescope has observed high-energy light from solar eruptions located on the far side of the sun, which should block direct light from these events. This apparent paradox is providing solar scientists with a unique tool for exploring how charged particles are accelerated to nearly the speed of light and move across the sun during solar flares.
Fermi has seen gamma rays from the Earth-facing side of the sun, but the emission is produced by streams of particles blasted out of solar flares on the far side These particles must travel some 300,000 miles within about five minutes of the eruption to produce this light. Fermi has doubled the number of these rare events, called behind-the-limb flares, since it began scanning the sky in 2008. Its Large Area Telescope (LAT) has captured gamma rays with energies reaching 3 billion electron volts, some 30 times greater than the most energetic light previously associated with these "hidden" flares.
Thanks to NASAs Solar Terrestrial Relations Observatory (STEREO) spacecraft, which were monitoring the solar far side when the eruptions occurred, the Fermi events mark the first time scientists have direct imaging of beyond-the-limb solar flares associated with high-energy gamma rays. The hidden flares occurred Oct. 11, 2013, and Jan. 6 and Sept. 1, 2014. All three events were associated with fast coronal mass ejections (CMEs), where billion-ton clouds of solar plasma were launched into space. The CME from the most recent event was moving at nearly 5 million miles an hour as it left the sun. Researchers suspect particles accelerated at the leading edge of the CMEs were responsible for the gamma-ray emission.
Large magnetic field structures can connect the acceleration site with distant part of the solar surface. Because charged particles must remain attached to magnetic field lines, the research team thinks particles accelerated as the CME traveled to the sun’s visible side along magnetic field lines connecting both locations. As the particles impacted the surface, they generated gamma-ray emission through a variety of processes. One prominent mechanism is thought to be proton collisions that result in a particle called a pion, which quickly decays into gamma rays.
Credit: NASA’s Goddard Space Flight Center/Scott Wiessenger
Music: "Jupiters Eye" from Killer Tracks
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THE CAT'S EYE NEBULA FROM HUBBLE Image Credit: NASA, ESA, Hubble, HLA; Reprocessing & Copyright: Raul Villaverde
To some, it may look like a cat's eye. The alluring Cat's Eye nebula, however, lies three thousand light-years from Earth across interstellar space. A classic planetary nebula, the Cat's Eye (NGC 6543) represents a final, brief yet glorious phase in the life of a sun-like star. This nebula's dying central star may have produced the simple, outer pattern of dusty concentric shells by shrugging off outer layers in a series of regular convulsions. But the formation of the beautiful, more complex inner structures is not well understood. Seen so clearly in this digitally reprocessed Hubble Space Telescope image, the truly cosmic eye is over half a light-year across. Of course, gazing into this Cat's Eye, astronomers may well be seeing the fate of our sun, destined to enter its own planetary nebula phase of evolution ... in about 5 billion years.
Taken by CHENG LUO (web name Starwisper) on January 26, 2017 @ Changsha, Hunan province, China
Jan 26th,2017, Moon and Mercury are near conjunction, I take this photo for them and the rising milkway galaxy at 5:50 AM. This pic show not only the meeting of Moon and Mercury,but also a much bigger space party.In the backguand deep space, there are many red nebulas:lagoon nebula,cat paw,Omega nebula,Eagle nebula and so on,and star clusters:M6,M7. The moon is over-exposure but still can show itself with all the deep space objects,Mercury is just rising over the horizon, Saturn is above the galaxy heart,a meteor and a man-made satellite also show their trails.
The only participant on earth is a ancient Taoism temple on the foregroud. This temple was built about 1800 years ago by Ge Xuan（164-244）, a master of Taoism in ancient China. The temple is at altitude of 1904 m on Wugong shan mountain,Jiangxi province, China. The temple face east with 2 other temples together. It is a tupical Taoist architecture facing due east,which agrees with Taoist allusion that the Purple Air comes from the east and auspicious comes. Nowaday,the temple was protected by local government and be a good site for sunrise watching.Wugong shan mountain is a good place for outdoor sports and star-watching with few light pollution.
Jan 28, 2017 is the Spring Festival and Chinese New Year. May catching this memorable photo take auspicious to us.
Sunday, January 29, 2017
RED AURORA OVER AUSTRALIA Image Credit & Copyright: Alex Cherney (Terrastro, TWAN)
Why would the sky glow red? Aurora. A solar storm in 2012, emanating mostly from active sunspot region 1402, showered particles on the Earth that excited oxygen atoms high in the Earth's atmosphere. As the excited element's electrons fell back to their ground state, they emitted a red glow. Were oxygen atoms lower in Earth's atmosphere excited, the glow would be predominantly green. Pictured here, this high red aurora is visible just above the horizon last week near Flinders, Victoria, Australia. The sky that night, however, also glowed with more familiar but more distant objects, including the central disk of our Milky Way Galaxy on the left, and the neighboring Large and Small Magellanic Cloud galaxies on the right. A time-lapse video highlighting auroras visible that night puts the picturesque scene in context. Why the sky did not also glow green remains unknown.
ORION AND CHINESE NEW YEAR Taken by Chinese Astronomy Photographic Alliance on January 27, 2017 @ CHINA
When the three Belt stars of Orion shine high in the south after sunset, it’s time for the spring festival in China ... the traditional Chinese New Year, starting this weekend!
The three lined-up prominent stars of Orion, which are regarded as the three gods of fortune, prosperity and longevity by Chinese. Here are the views of the three gods above all around China.
Over a billion people in China and millions around the world will celebrate the the Chinese New Year – the most important of Chinese holidays – on January 28, 2017. It’s a lunar new year and so the date is based on the date of new moon. Festivities continuing for 15 days and culminating with the Lantern Festival. Each year is associated with one of 12 animals in the Chinese zodiac. For 2017, it’s the Year of the Rooster.
Photo taken by Chinese Astronomy Photographic Alliance, show with premission.
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