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Tag archives: ESO

SPHERE opens its ‘all-seeing’ eye

SPHERE images the dust ring around HR 4796A (Courtesy: ESO/J-L Beuzit et al./SPHERE Consortium)

The dust ring around HR 4796A. (Courtesy: ESO/J-L Beuzit et al./SPHERE Consortium)

By Tushna Commissariat

While the fiery shades of the image above may seem familiar to fans of the Lord of the Rings movie franchise, pictured above in exquisite clarity is a ring of dust that surrounds the near-by star HR 4796A. The young, hot star – located a scant 240 light-years from Earth – has been of significant interest to astronomers since the circumstellar ring of debris was detected, thanks to an excess of infrared emissions from the star. While there have been many other images of the HR 4796A system, this particular image has been obtained by the new Spectro-Polarimetric High-contrast Exoplanet REsearch instrument (SPHERE), which was installed in May this year on the European Southern Observatory’s Very Large Telescope (VLT) at the Paranal Observatory in Chile. Thanks to the instrument, not only is the dust-ring clearly outlined, but the glare of the bright star at the centre of the picture has been supressed. This has provided a much clearer view of the whole system, which researchers think also harbours an exoplanet or two.


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Physics on the big screen

By Tushna Commissariat

A new documentary of Stephen Hawking’s life is due in cinemas later this summer, with the esteemed physicist himself narrating the film. Hawking, as the documentary is simply dubbed, takes a personal look at the life of the celebrated scientist – his early days as a student in Oxford and his ongoing battle with motor neurone disease – as well as documenting his academic achievements.


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