Tag archives: astrophotography
By Tushna Commissariat and Hamish Johnston
Folk and country music often blends the sharp twang of a banjo with the mellow and sustained tone of a guitar. While the two instruments appear to be very similar – at least at first glance – they have very different sounds. This has long puzzled some physicists, including Nobel laureate David Politzer, who may have just solved this acoustical mystery.
By Tushna Commissariat
Each week, all of us here at Physics World comb the Internet for all things physics – we look at national and local newspapers, university news outlets, a variety of magazines, science websites and blogs, and, of course, all the latest scientific papers. We then pool our research and pick the cream of our crop to report on. But we can’t always cover all the interesting bits of physics news that we have chanced upon and a lot of good stuff is left behind in a red folder. So, starting from today, at the end of each week we’ve decided to point all of you, our eager readers, to the stories that have caught our fancy but not made it to the site yet and leave you with some extra weekend reading from The Red Folder.
By Tushna Commissariat
It is commonly thought that astronomy and astrophotography are rather exclusive hobbies and that you require a lot of specialist equipment and training to pursue them. But an amateur astrophotographer, using only his ordinary digital SLR camera, a tripod and his love for the skies, has won the major astrophotography prize at the inaugural STARMUS festival.
Not only did Alex Cherney win the opportunity to attend and mingle with the who’s who of astronomy at the STARMUS festival – an astronomy and space-science festival held in the Canary Islands this June – but the Australian amateur astronomer also won an hour using one of the largest optical telescope on the planet – the 10.4 m Gran Telescopio Canarias (GranTeCan), in the Canary Islands in Spain.
Cherney’s prize-winning collection of time-lapse sequences of the Milky Way, seen over the Southern Ocean, beat a bevy of global participants for the best entry as judges felt his scenes were “chosen with the eye of an artist” and that his “subtle panning and excellent control of colour and contrast revealed technical skills of the highest order”. Cherney uses only his Nikon D700 DSLR camera and produced a compilation of images taken over 31 hours of exposure time.
This is notably the first time an amateur astronomer has been allowed access to the GranTeCan and Cherney was keen to make the most of the opportunity. After much deliberation, he decided to use his hour to observe and photograph Arp84, a pair of interacting galaxies – NGC5394 and NGC5395. (Image above courtesy: Alex Cherney)
“I wanted an object that would look nice given the parameters of the telescope and has not been photographed in colour and great detail by a professional telescope,” he said. Noel Carboni, an astro-image-processing expert, met Cherney at the festival and helped to produce a colour image. Carboni feels this is the clearest image of Arp84 ever made. Cherney felt the experience of using the telescope was “incredible”, akin to taking a space flight. “It is very hard to describe what it is like to observe space with an instrument that is helping scientists seek answers to the origin of the universe.”
Cherney put his opportunity of being at the La Palma observatory to good use, producing another time-lapse video featuring GranTeCan and MAGIC (Major Atmospheric Gamma-ray Imaging Cherenkov Telescopes) as the backdrop for the night skies. Take a look at the stunning video below.