lunes, 2 de marzo de 2015

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The comet sprung up in a photo snapped taken by the 570-megapixel Dark Energy Camera in December as it was scanning the southern sky. At the time this image was taken, the comet was passing about 51 million miles (82 million km) from Earth. It appeared as a burst of green light against sky full of stars. Each of the rectangles represents one of the 62 individual fields of the camera 

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he comet's centre is a ball of ice roughly three miles (5 km) across, and the visible head of the comet is a cloud of gas and dust about 400,000 miles (640,000 km) in diameter. Pictured is a shot taken by an amateur astronomer earlier this year 


The comet's distinctive green glow comes from molecules of diatomic carbon - two carbon atoms joined together - and cyanogen fluorescing in the ultraviolet light from the sun.Its tail takes on a blue tinge due to the carbon monoxide it contains 


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In one stunning shot, Terry Virts revealed the enormity of the ISS against the blackness of space as his fellow astronaut Butch Wilmore prepared the station for future 'space taxis'.'Can you spot the space walker in this picture?' Virts tweeted. 'He's very small compared to the enormous starboard truss of the #ISS' 


Commander Barry "Butch" Wilmore is circled in red. The astronauts completed installing 400 feet of cable and several antennas associated with the Common Communications for Visiting Vehicles system known as C2V2 


Terry Virts took a space selfie, moments after completing the job. He wrote on Twitter: 'Mission Accomplished - three #spacewalks, 800' of cable, four antennas, three laser reflectors, one greased robotic arm' 


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The solar eclipse is set to block out nearly 90 per cent of sunlight across parts of Europe next month. On the morning of the 20 March the moon's orbit will see it travel in front of the sun casting a shadow over Earth - and the eclipse will be the biggest event of its kind since 11 August 1999 (pictured over Germany) 


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Look ma, no hand: One of the men who has benefitted from Prof Aszmann's treatment, Milorad Marinkovic, shows his bionic arm as he poses for a photograph at his home in Vienna, Austria 


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Explosion? This crater (named B3) was spotted near to Antipayuta in the Yamal Peninsula after locals saw a flash of light nearby 
Abyss: This crater, called B1, was first spotted 18 miles (30 km) from the Bovanenkovo by passing helicopter pilots 
Last year scientists took a closer look at one of the older craters by climbing 54 feet down its frozen sides 
When this crater was discovered in 2014, theories ranged from a man-made hoax, to aliens or a meteorite 
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Scientists are attempting to visit all of the craters, like above, to better understand how they were formed 


Astronomers have so far focused their search for alien life on planets that are similar to our own.But extra-terrestrial beings could be residing on worlds that look like giant eyeballs (artist's impression pictured) circling Red dwarves instead, according to one researchers 


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Future 100-year flood zones for New York City. Large areas of Queens (shown in light green) will be hit by floods in the 2020s, while areas of Brooklyn and the Bronx (yellow) will face the same fate in the 2050s. The purple shows the high-risk zones in New York 

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Pictured are observed and projected temperature in New York City.  The frequency of heat waves is set rise to two per year in the 1980s to roughly six per year by the 2080s, according to the report 

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Map of annual temperature changes in the Northeast in 2050. In New York, Nasa predicts annual temperatures will increase 4.1°F to 5.7°F by the 2050s and 5.3°F to 8.8°F by the 2080s 

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With growth rates of between one to five millimetres in a million years, some of the nodules could be 10 million years old, the researchers said. Pictured is a stock image of a manganese nodule 

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These metal balls consist of the manganese, iron and other coveted metals such as copper, cobalt or zinc 

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In a second timelapse (still pictured), the eosinophils is shown in red and a C. elegans dauer larva is pictured in green. It similarly shows the cells attacking the worm over the course of 60 minutes. At around 54 minutes, the shifting worm is seen escaping a large group of eosinophils and moving it roughly 100 micrometres 

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 Large old icebergs contain centuries of windblown sediment and minerals, visible as layers when they roll over. 

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 Salt water is much denser than fresh water, causing icebergs to float. As they melt in the ocean, their weight distribution can change, causing some icebergs to flip over completely.



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The pictures were taken in Iceberg Alley, a region in the western Weddell Sea..


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While on an expedition to Antarctica, San Francisco- based Alex Cornell was stunned by an blue iceberg floating across the landscape


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