Sunday, June 30, 2019
" SUN " ( 2DA PRUEBA PARA EL ECLIPSE DEL SOL 02-07-2019 ) DESDE ROSARIO - ARGENTINA //// FOTO: ESMERALDA SOSA //// 30-06-2019
.. de 4.35pm a 5.59pm ..
.. en pruebas de día 30-06-2019 el SOL a 3 GRADOS DE ALTITUD ..
info: Licenciado en Física José Luis Lomáscolo ( para dia del eclipse 02-07-2019 )
PARA VER EN HD ABRIR SIGUIENTE LINK
+info ( PRIMERA PRUEBA 18-06-2019 ):
PRIMERA PRUEBA ( 18-06-2019 )
SEGUNDA PRUEBA ( 30-06-2019 )
.. a Cachitus ! ( como siempre ).. nos reventamos a cálculos ... y tus calculos PERFECTOS !!
Saturday, June 29, 2019
M83: THE THOUSAND-RUBY GALAXX Image Credit: Subaru Telescope (NAOJ), Hubble Space Telescope, European Southern Observatory - Processing & Copyright: Robert Gendler
Big, bright, and beautiful, spiral galaxy M83 lies a mere twelve million light-years away, near the southeastern tip of the very long constellation Hydra. Prominent spiral arms traced by dark dust lanes and blue star clusters lend this galaxy its popular name, The Southern Pinwheel. But reddish star forming regions that dot the sweeping arms highlighted in this sparkling color composite also suggest another nickname, The Thousand-Ruby Galaxy. About 40,000 light-years across, M83 is a member of a group of galaxies that includes active galaxy Centaurus A. In fact, the core of M83 itself is bright at x-ray energies, showing a high concentration of neutron stars and black holes left from an intense burst of star formation. This sharp composite color image also features spiky foreground Milky Way stars and distant background galaxies. The image data was taken from the Subaru Telescope, the European Southern Observatory's Wide Field Imager camera, and the Hubble Legacy Archive.
Residents of Chile and Argentina are about to witness a rare total eclipse of the sun. On July 2, 2019, the new Moon will pass across the solar disk, creating a black hole in the sky just before sunset in the two South American countries. This animated map, created by space artist Larry Koehn, includes a local timetable of events:
The path of totality cuts across ESO's La Silla Observatory in Chile and barely misses the center of Buenos Aires in Argentina. The Moon's elongated sunset shadow will swallow observers for 1 to 2 minutes depending on their exact location.
Outside the path of totality, the eclipse is partial with significant coverage in large cities such as Santiago, Chile (93%); Montevideo, Uruguay (94%); La Paz, Bolivia (63%); and Lima, Peru (54%). During the partial phase of the eclipse, the sun looks like a crescent, and it casts crescent-shaped shadows on the ground. South Americans should look for them underneath the canopies of leafy trees. Using safe eclipse glasses, it is possible to view the crescent sun directly.
The sun and Moon align for an eclipse once or twice every year. Aligning directly over a major observatory, however, is very rare. This video shows what the eclipse will look like over La Silla:
La Silla is home to some of the world's biggest telescopes and many skilled observers. Observatory staff will host more than a thousand members of the public in a viewing party among the telescope domes. A live high-definition webcast of the eclipse will be available on ESO's website and on ESO's Youtube Channel. The action begins on Tuesday, July 2nd.