Thursday, April 30, 2015
Across the Sun Image Credit & Copyright: Göran Strand
A long solar filament stretches across the relatively calm surface of the Sun in this telescopic snap shot from April 27. The negative or inverted narrowband image was made in the light of ionized hydrogen atoms. Seen at the upper left, the magnificent curtain of magnetized plasma towers above surface and actually reaches beyond the Sun's edge. How long is the solar filament? About as long as the distance from Earth to Moon, illustrated by the scale insert at the left. Tracking toward the right across the solar disk a day later the long filament erupted, lifting away from the Sun's surface. Monitored by Sun staring satellites, a coronal mass ejection was also blasted from the site but is expected to swing wide of our fair planet.
.. que fotito...
ALMOST BLANK SUN
The sunspot number is plummeting toward zero. Only a few dark cores are peppering the face of the sun, and they are so small you might have trouble finding them in this April 30th image from the Solar Dynamics Observatory:
Almost no sunspots = almost no solar activity. The sun's X-ray output has flatlined, and NOAA forecasters estimate a scant 1% chance of strong flares in the next 24 hours.
If the sunspot number continues to drop, the sun could become completely blank. Blank, spotless suns are a sign that Solar Max is ending. Stay tuned for ... quiet?
Wednesday, April 29, 2015
FIRST EXOPLANET VISIBLE LIGHT SPECTRUM
http://www.astronomy.com/news/2015/04/first-exoplanet-visible-light-spectrum
This artist’s view shows the hot Jupiter exoplanet 51 Pegasi b, sometimes referred to as Bellerophon, which orbits a star about 50 light-years from Earth in the northern constellation Pegasus the Winged Horse. This was the first exoplanet around a normal star to be found in 1995. Twenty years later, this object was also the first exoplanet to be be directly detected spectroscopically in visible light.
+ info relacionada:
DEDICADAS ( PARA ANDREA JIMENEZ ) FELIZ CUMPLE !!!!!!
.. PARA VOS ANDRE!... FELIZ CUMPLE !! ..
FUE TODO UN LOGRO SACAR ESTA FOTO.. ESTABA MUY NUBLADO !! ...
Tuesday, April 28, 2015
HUBBLE TELESCOPE’S SILVER ANNIVERSARY
http://www.skyandtelescope.com/astronomy-news/hubble-space-telescope-silver-anniversary-04242015/
With a mass of 11 tons and 43 feet (13.2 m) long, the Hubble Space Telescope has been peering into the depths of the universe since 1990. Here's its seen in February 1997, during the second of five Space Shuttle servicing missions.
NASA
Liftoff! The Space Shuttle Discovery soars skyward on April 24, 1990. Squeezed in its cargo bay is a precious payload: the Hubble Space Telescope.
NASA
Astronauts John Grunsfeld (left) and Richard Linnehan work to replace the Hubble Space Telescope's power control unit during a March 6th space walk. One of the orbiting observatory's new solar-cell arrays, installed earlier in the week, looms at right.
Massive Nearby Spiral Galaxy NGC 2841 Image Credit: Hubble, Subaru; Composition & Copyright: Roberto Colombari
It is one of the more massive galaxies known. A mere 46 million light-years distant, spiral galaxy NGC 2841 can be found in the northern constellation of Ursa Major. This sharp view of the gorgeous island universe shows off a striking yellow nucleus and galactic disk. Dust lanes, small, pink star-forming regions, and young blue star clusters are embedded in the patchy, tightly wound spiral arms. In contrast, many other spirals exhibit grand, sweeping arms with large star-forming regions. NGC 2841 has a diameter of over 150,000 light-years, even larger than our own Milky Way and captured by this composite image merging exposures from the orbiting 2.4-meter Hubble Space Telescope and the ground-based 8.2-meter Subaru Telescope. X-ray images suggest that resulting winds and stellar explosions create plumes of hot gas extending into a halo around NGC 2841.
... no podes sacar una foto tan buena !!! .. vamos HUBBLE & COLOMBARI TODAVIA !!!
EXPLOSION ON THE SUN
http://spaceweather.com/images2015/28apr15/20150428183715_512_aia_0304.mp4?PHPSESSID=os29eso09s4qmarbrls1d0cdn6
For days, astronomers have been monitoring a magnificent filament of magnetism stretching across the face of the sun. This morning, April 28th, it erupted. NASA's Solar Dynamics Observatory recorded the blast:
Hurled upward by magnetic instabilities, the erupting filament split the sun's atmosphere, creating a "canyon of fire." The glowing walls of the canyon trace the original channel where the filament was suspended by magnetic forces above the sun's surface. From end to end, the structure stretches more than 350,000 km--a real Grand Canyon:
A coronal mass ejection (CME) is also emerging from the blast site: SOHO image. At first glance, the CME appears to be moving well away from the sun-Earth line. However, coronagraph data are too preliminary to rule out a glancing blow to our planet in the days ahead.
For days, astronomers have been monitoring a magnificent filament of magnetism stretching across the face of the sun. This morning, April 28th, it erupted. NASA's Solar Dynamics Observatory recorded the blast:
A coronal mass ejection (CME) is also emerging from the blast site: SOHO image. At first glance, the CME appears to be moving well away from the sun-Earth line. However, coronagraph data are too preliminary to rule out a glancing blow to our planet in the days ahead.
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Monday, April 27, 2015
CURSOS ASTRONOMÍA 2015 " MAPA DEL CIELO " EN EL PLANETARIO CIUDAD DE ROSARIO
AGRADECIMIENTOS:
.. a Angelito Travella por ser como es..
sos un " Angel " en varios aspectos..
Gracias por siempre recordar a
la historia y difundirla y por el respeto y aprecio que siempre le tuviste a mi
viejo.. que era mutuo.. jamás te voy a olvidar por tus tan cálidas y verdaderas
palabras de cariño y respeto hacia el.. te quiero un montón Angelito!!..
+ AGRADECIMIENTOS:
.. a Guillermo García ( que te pase el resfrío
pronto ) ..
.. a
Juan Ignacio por estar ahí siempre y muy bien con las figuras de constelaciones
!!!
MIS FOTOS DE HOY VAN DEDICADAS A TODOS LOS
ALUMNOS DE MAPA DEL CIELO 2015 !!!
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