Caledari d’Advent d’astronomia i astrofísica

Via Scoop.itEscola i Educació 2.0

Cada matí, m’agrada seguir l’APOD (Astronomical Picture of the Day) de la NASA, i en força ocasions n’he parlat al bloc.

En la mateixa direcció, aquests dies previs a Nadal, el diari digital The Atlantic, a la seva secció de fotografia In Focus, ens ofereix el Calendari d’Advent del telescopi especail Hubble.

Avui, 2n diumenge d’Advent i 4t dia del mes de desembre ja tenim un total de 4 fotos publicades, totes elles precioses. Així que, cada dia fins arribar la diada de Nadal, us animo a consultar la imatge del dia, després d’obrir  la finestreta per menjar la xocolatina ;)

Via pepquimic.wordpress.com

Continuing with a holiday tradition I started a few years ago, I’m happy to bring you the 2011 Hubble Space Telescope Advent Calendar. Every day until Sunday, December 25, this page will present one new image of our universe from NASA’s Hubble telescope. Be sure to bookmark this calendar and come back every day until the 25th, or follow @in_focus on Twitter, or me on Google+, for daily updates. I hope you enjoy these amazing and awe-inspiring images and the efforts of the science teams who have brought them to Earth. I feel fortunate to have been able to share photo stories with you all year, and I wish a Merry Christmas to those who celebrate it, and peace on Earth to all. (Also, choosing the “1280px” viewing option below, if you can support it, will be a good option.) [25 photos – eventually]

Use j/k keys or ←/→ to navigate Choose: 1024px 1280px

1.

A “Rose” of a Galaxy. In celebration of the 21st anniversary of the Hubble Space Telescope’s deployment into space, astronomers at the Space Telescope Science Institute pointed Hubble’s eye to an especially photogenic group of interacting galaxies called Arp 273. Pictured here is the larger of the two galaxies, known as UGC 1810. It has a disk that is tidally distorted into a rose-like shape by the gravitational tidal pull of the companion galaxy below it, known as UGC 1813. A swath of blue jewels across the top is the combined light from clusters of intensely bright and hot young blue stars. These massive stars glow fiercely in ultraviolet light. A possible mini-spiral may be visible in the spiral arms of UGC 1810 to the upper right. It is noticeable how the outermost spiral arm changes character as it passes this third galaxy, from smooth with lots of old stars (reddish in color) on one side to clumpy and extremely blue on the other. UGC 1810 lies in the constellation Andromeda and is roughly 300 million light-years away from Earth. More info here. (NASA, ESA, STScI/AURA) 
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