It is making the news in various places that we have the first picture of a black hole… sort of. The part I find interesting is the size of the hole and of the picture, yeah, the size of the picture is impressive. More so than it looks
The black hole is in the constellation Virgo. The app Skyview (Android and iOS) or StarDate.org will help you find Virgo in the night sky. But you can’t see the black hole with your eyes. At 55 million lightyears away the hole which is 6.5 billion times heavier than our sun (10 billion kilometers in diameter – the diameter of Neptune’s orbit is 9 billion km) is too small to see.
To photograph it 8 radio telescopes located in Hawaii, Spain’s Sierra Nevada, the Chilean desert, and on the Antarctic ice sheet were used to create a huge virtual telescope. Each scope took images totaling about a petabyte of data (or 1 million megabytes). At that size, it was faster to fly the stacks of disks via FedEx to Massachusetts and Germany for processing by a supercomputer called a correlator rather than try to ‘upload’ the information. According to MeridianOutpost.com a petabyte of data would take 15,770 hours on an OC3 (155Mbps) connection (over 2 years). Continue reading Big Black Hole – How big is the picture?