Changes in the way the light moves comes from the way gravity bends the light as it travels from the quasar towards Earth.
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That lengthens the wavelength of the light and shifts it towards the red end of the colour spectrum.
The upshot is that the crystals can steer light towards four separate points corresponding to the places where the viewers' right or left eyes are.
If the signature of an element is found at a wavelength that is slightly to the blue side of what experiments in a laboratory show, this means the star is moving towards the earth, making the wavelength of the light it was emitting slightly shorter.
He wants the UK to remain within the EU but believes there is a need to redefine the relationship in light of moves towards further integration by countries using the single currency.
Mr Cameron wants the UK to remain within the EU but believes there is a need to redefine the relationship in light of moves towards further integration by countries using the single currency.
David Cameron has said he wants the UK to remain within the EU, but says there is a need to redefine the relationship in light of moves towards further integration by countries using the single currency.
There was also an accordion performance, the playing of vinyl on a record player and, towards the end, an impressive piece of physical theatre cleverly set to a flickering light in a darkened room to give the impression of an old cine-film recording - a highlight for me in such a small space.
In light of somewhat strained relationship with the US and Europe, Ukraine, still leaning towards European integration, wants to make a good impression.
Previous research found artificial light caused newly-hatched turtles to head away from the sea, rather than towards it, and caused seabirds such as petrels to collide with lighthouses and other lit structures.
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About 20 feet down the garden was a Puma as the dogs started barking it looked towards me its eyes glowing it then jumped over the fence to the next door garden setting off their security light.
The City of Light wove its spell upon Gadsby and she decided to attend college there while working towards a degree in international business.
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Here, looking towards the centre of the Milky Way, it spies a ribbon of cold gas and dust that is more than 600 light-years across and which appears to be twisted.
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