Vulgarian Posted March 22, 2014 Share Posted March 22, 2014 LOL Quote Link to comment Share on other sites More sharing options...
Bobbie Bobster Posted March 22, 2014 Share Posted March 22, 2014 1 Quote Link to comment Share on other sites More sharing options...
Chinahand Posted April 23, 2014 Author Share Posted April 23, 2014 Between 2000 and 2013, a network of sensors that monitors Earth around the clock listening for the infrasound signature of nuclear detonations detected 26 explosions on Earth ranging in energy from 1-600 kilotons – all caused not by nuclear explosions, but rather by asteroid impacts.Link Quote Link to comment Share on other sites More sharing options...
Bobbie Bobster Posted June 7, 2014 Share Posted June 7, 2014 June 3, 2014: Astronomers using the Hubble Space Telescope have assembled a comprehensive picture of the evolving universe — among the most colorful deep space images ever captured by the 24-year-old telescope. This study, which includes ultraviolet light, provides the missing link in star formation.http://hubblesite.org/newscenter/archive/releases/2014/27/ Quote Link to comment Share on other sites More sharing options...
Albert Tatlock Posted June 7, 2014 Share Posted June 7, 2014 I've got a friend with a kitchen worktop just like that. Maybe suggest she gives it a wipe. Quote Link to comment Share on other sites More sharing options...
Bobbie Bobster Posted June 7, 2014 Share Posted June 7, 2014 I've got a friend with a kitchen worktop just like that. My God, it's full of stars? Quote Link to comment Share on other sites More sharing options...
quilp Posted June 7, 2014 Share Posted June 7, 2014 I've got a friend with a kitchen worktop just like that. Maybe suggest she gives it a wipe. Universal cleaner! Quote Link to comment Share on other sites More sharing options...
Chinahand Posted June 13, 2014 Author Share Posted June 13, 2014 I just love it when you see something which reminds you just how big the universe is.And the Bad Astronomy blog has done it again! What you are seeing is V838 Monocerotis which is a star in the Unicorn constellation, Monoceros.What is really important to note is you aren't really seeing an explosion here. Three to ten million years ago V838 Mon went through a stage in its stellar life where it expanded and expelled a lot of its mass into a surrounding planetary nebular. This gas is hardly moving, relative to the distances and time scales shown in the youtube video. You are not watching the gas expand and move.So, what are we seeing moving in the video if it isn't the gas ... well it is light!The video is showing a light echo - in 2002 there was a vast stella explosion on V838 Mon - so large that it might have for a short while become the most luminous star ever observed! What caused this explosion - the astronomers aren't sure, but some think it was two stars colliding and merging into one!The light from this explosion traveled out into space, at the speed of light, and some of the light has then been scattered and reflected by the interstellar dust from the already existing planetary nebular.Because the reflected light has traveled a longer path than the direct light from the explosion it arrives later on earth.What we are seeing, via the Hubble Space Telescope, is light moving over 4 years of observation.In our normal experience light basically moves instantaneously, but compared to the distances involved in space 671 million miles per hour is slow, making for a beautiful image as it travels out into the vast distances of space. Pretty - and awesome too! 1 Quote Link to comment Share on other sites More sharing options...
Bobbie Bobster Posted July 6, 2014 Share Posted July 6, 2014 (edited) Buddy Loans (insert Harry Hill quizzical side-look to camera here) have produced the linked infographic, setting out their estimate of the cost of living on the moon for a year. Not shown directly because it's quite a long picture, but the bottom line is, it's a lot of moolah. Of course, there's going to be quite a lot of economies of scale if you're going to set up a permanent base; I doubt it would be $60bn pp pa. Edited July 6, 2014 by Bobbie Bobster Quote Link to comment Share on other sites More sharing options...
woolley Posted July 6, 2014 Share Posted July 6, 2014 For the first time ever, man records the transit of Mercury across the Sun from a location other than Earth. http://www.jpl.nasa.gov/news/news.php?release=2014-183 Quote Link to comment Share on other sites More sharing options...
Bobbie Bobster Posted September 5, 2014 Share Posted September 5, 2014 From Nature, via Engadget Laniakea: Our home supercluster Superclusters – regions of space that are densely packed with galaxies – are the biggest structures in the Universe. But scientists have struggled to define exactly where one supercluster ends and another begins. Now, a team based in Hawaii has come up with a new technique that maps the Universe according to the flow of galaxies across space. Redrawing the boundaries of the cosmic map, they redefine our home supercluster and name it Laniakea, which means ‘immeasurable heaven’ in Hawaiian. Read the research paper: http://dx.doi.org/10.1038/nature13674 Quote Link to comment Share on other sites More sharing options...
quilp Posted September 5, 2014 Share Posted September 5, 2014 Far out guys.... Quote Link to comment Share on other sites More sharing options...
Albert Tatlock Posted September 5, 2014 Share Posted September 5, 2014 Why don't they give these things proper names like Keith? Quote Link to comment Share on other sites More sharing options...
Bobbie Bobster Posted September 5, 2014 Share Posted September 5, 2014 I think Laniakea is a lovely name. Imagine the effect on property values if we lived in Perseus-Pisces! Quote Link to comment Share on other sites More sharing options...
woolley Posted September 5, 2014 Share Posted September 5, 2014 I've got a friend with a kitchen worktop just like that. My God, it's full of stars? Maybe her worktop is actually the universe. Nobody has a better explanation. Quote Link to comment Share on other sites More sharing options...
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