La foto de la semana | portalastronomico.com

‘La foto de la semana’

supernova-de-vela

Supernova de Vela

enero 11, 2019

galaxia-andromeda-m31

M31: La galaxia de Andrómeda

enero 2, 2019

gran-nebulosa-carina

La gran nebulosa de Carina

diciembre 28, 2018

StarTrails-Everest

StarTrails sobre el Monte Everest

diciembre 3, 2018

nebulosa-de-la-cueva

La nebulosa de la cueva en hidrógeno, oxígeno y azufre

noviembre 16, 2018

aurora-rana-suecia

Aurora desde el punto de vista de la rana

octubre 26, 2018

HH-666-hubble

HH 666: los pilares de polvo con chorro de Carina

octubre 19, 2018

ngc1055

La gran y atractiva galaxia espiral NGC 1055 es un miembro dominante de un pequeño grupo de galaxias que hay a tan sólo 60 millones de años luz de distancia en la constelación Cetus. Este universo isla, que se ve de lado, abarca más de…

NGC 1055 de cerca

octubre 5, 2018

galaxia-anillo

Colisión cósmica forja anillo galáctico

septiembre 28, 2018

Mont-blanc-meteoro-via-lactea

Mont Blanc, Meteoro y la Vía Láctea

septiembre 21, 2018

The globular cluster Messier 5, shown here in this NASA/ESA Hubble Space Telescope image, is one of the oldest belonging to the Milky Way. The majority of its stars formed more than 12 billion years ago, but there are some unexpected newcomers on the scene, adding some vitality to this aging population. Stars in globular clusters form in the same stellar nursery and grow old together. The most massive stars age quickly, exhausting their fuel supply in less than a million years, and end their lives in spectacular supernovae explosions. This process should have left the ancient cluster Messier 5 with only old, low-mass stars, which, as they have aged and cooled, have become red giants, while the oldest stars have evolved even further into blue horizontal branch stars. Yet astronomers have spotted many young, blue stars in this cluster, hiding amongst the much more luminous ancient stars. Astronomers think that these laggard youngsters, called blue stragglers, were created either by stellar collisions or by the transfer of mass between binary stars. Such events are easy to imagine in densely populated globular clusters, in which up to a few million stars are tightly packed together. Messier 5 lies at a distance of about 25 000 light-years in the constellation of Serpens (The Snake). This image was taken with Wide Field Channel of Hubble’s Advanced Camera for Surveys. The picture was created from images taken through a blue filter (F435W, coloured blue), a red filter (F625W, coloured green) and a near-infrared filter (F814W, coloured red). The total exposure times per filter were 750 s, 400 s and 567 s, respectively. The field of view is about 2.6 arcminutes across.

Hubble visita a Messier 5

septiembre 7, 2018

NGC-6914

El complejo NGC 6914

agosto 31, 2018

nebulosa-del-alma

Elementos brillantes en la nebulosa del alma

agosto 24, 2018

ThorsHelmet_Block_1400

Esta nube cósmica en forma de casco con apéndices de aspecto de ala se conoce popularmente como Casco de Thor. Heroicamente dimensionado incluso para un dios nórdico, Casco de Thor tiene unos 30 años luz. De hecho, el casco se parece más a una burbuja…

Nebulosa de emisión Casco de Thor

agosto 17, 2018

galaxia-espiral-NGC-6744

Galaxia espiral NGC 6744

agosto 10, 2018

eclipse-lunar-27-julio-2018

Eclipse Lunar Central

agosto 3, 2018

orionidas

Meteoritos oriónidos de Orión

julio 27, 2018

R-Aquarii

R Aquarii simbiótica

julio 17, 2018

arcoiris-delaware

Arco rojizo sobre Delaware

julio 6, 2018

pilares-creacion-nebulosa-aguila-m16

Pilares de la nebulosa del águila en infrarrojo

junio 22, 2018