Reply to thread

Message: <blockquote data-quote="nismok" data-source="post: 5513126" data-attributes="member: 109094"><img src="http://i.i.com.com/cnwk.1d/i/tim//2009/09/10/HubbleCarinaeLabeled_2_540x531.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" />NASA describes Eta Carinae as having a "volatile temperament," and as a doomed star, why shouldn't it be just a little moody? Here's how it has behaved in the last two centuries: "In 1843, Eta Carinae was one of the brightest stars in the sky. It then slowly faded until, in 1868, it became invisible in the sky. Eta Carinae started to brighten again in the 1990s and was again visible to the naked eye. Around 1998 and 1999, its brightness suddenly and unexpectedly doubled."     <img src="http://i.i.com.com/cnwk.1d/i/tim//2009/09/10/HubbleCarinaeFinale_2_540x360.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" />The Space Telescope Imaging Spectrograph, repaired in May, offers details on chemical elements dispatched from Eta Carinae. This narrow slice shows, among other things, iron and nitrogen in the outer reaches. Eta Carinae, first catalogued by Edmund Halley in 1677, is 7,500 light-years away in the constellation Carina.     <img src="http://i.i.com.com/cnwk.1d/i/tim//2009/09/10/HubbleMarkarianCloseup_2_540x417.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" />The spiral galaxy Markarian 817 is a study in blue--and in super high speeds. NASA says that the black hole affiliated with the galaxy is shooting out material at 9 million miles per hour. Markarian 817 is 430 million light-years away in the constellation Draco.     <img src="http://i.i.com.com/cnwk.1d/i/tim//2009/09/10/HubbleMarkarian_2_540x432.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" />This Cosmic Origins Spectrograph reading shows the difference a dozen years can make, even in the vastness of cosmic time. Says NASA: "The COS spectrum of Markarian 817 highlights the outflow's dynamic nature. A gas cloud containing hydrogen gas that was detected in Hubble data taken in 1997 does not appear in the COS observation because the cloud has apparently been driven out by an outflow of material from the galaxy."     <img src="http://i.i.com.com/cnwk.1d/i/tim//2009/09/10/HubbleQuasarCloseup_2_540x540.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" />Light from the quasar PKS 0405-123 is allowing Hubble to peer great distances and get a bead on the "the cosmic web" of faint and diffuse gas that lies between galaxies, and thus the raw material from which those galaxies are conjured up. PKS 0405-123 is a scant 6.4 billion light-years away.     <img src="http://i.i.com.com/cnwk.1d/i/tim//2009/09/10/HubbleQuasar_2_540x432.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" />Looking at quasar PKS 0405-123, the Hubble's spectrograph tracks filaments of hydrogen, along with "evidence of glowing oxygen and nitrogen that predominantly trace strong shocks in the filamentary cosmic web. These shocks are produced by gravitational interactions between intergalactic clouds of gas falling onto filaments in the web and by the fast outflow of material from star-forming galaxies."     <img src="http://i.i.com.com/cnwk.1d/i/tim//2009/09/10/HubbleAbell_1_540x405.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" />The arcs and streaks in galaxy cluster Abell 370 reveal "gravitational lensing," the distortion of light from far-off, background galaxies by the cluster's gravitational field. The lensing effect helps astronomers measure the distribution of dark matter in galaxy clusters.Photo by NASA, ESA, and the Hubble SM4 ERO Team</blockquote>

Verification: Hathara warak wissa keeyada? (Hathara wadi karanna 20)

Top Bottom