Then, Siegelson said, you could seek refuge there, and wait until the gas cloud moves by.
Emergency officials in southern Kent advised residents "to keep doors and windows closed due to a gas cloud".
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At the moment the shape of the radio-emitting, cigar-shaped gas cloud at the core of the galaxy is a mystery.
Only if alpha were a smidgen smaller when the light passed through the gas cloud could such a pattern have been produced.
But this gas cloud, because it is so far away, about 40, 000 light years is still seeing the quasar, though we are not.
And so, what we believe in this case happened is there used to be an extremely luminous quasar right next to this gas cloud.
Just as in a container, molecules in an inter-galactic gas cloud absorb certain wavelengths and leave a pattern of dark lines on a quasar's spectrum.
On its route to earth, light from some quasars passed through a cloud of gas.
Steven Mandel trains his 7-inch telescope on a portion of the Veil Nebula, a cloud of gas 1, 600 light-years away.
These molecules appear at the fringe of the cloud of gas whose gravitational collapse and subsequent heating signals the birth of a star.
Scientists are eager to examine the asteroids because they formed in the same primordial cloud of gas and stellar material that collapsed to make the sun and the planets about 4.5 billion years ago.
Mr. EICHER: We can't really understand the solar system and how it got going unless we can really understand the origins and the conditions that happened when the solar nebula, this cloud of gas and dust, contracted down and the star turned on and the planets got going.
And new software, plus the ability to vary the projected sizes and brightnesses of planets and moons, makes it possible to simulate the sky from anywhere in the solar system: to see earthrise from Mars, for example, or to watch Jupiter's moons rise and set from a vantage point just above the gas giant's cloud-tops.
As they ran away from the smoke to one direction, they found themselves running into another cloud of tear gas fired by policemen blocking the road ahead.
The visible light from it was bright enough for George Djorgovski, Mark Metzger and Shri Kulkarni of the California Institute of Technology and their colleagues to analyse, and to demonstrate that it had travelled through a cloud of interstellar gas at least 10 billion light-years from the earth.
By observing the cloud of dust and gas kicked up by each impact, scientists knew they could obtain valuable data about the Moon's composition.
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"The 16 January kidnapping and murder of foreign oil workers at the In Amenas gas field has cast a dark cloud over the outlook for the country's energy sector, " it said.
In practice, nobody knows who would do what if American city-dwellers faced a lethal cloud of anthrax or nerve gas.
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Another dark lining in this silver cloud is that cheaper oil and gas will reduce incentives to produce green energies.
The heavy gas then sank to the ground and rolled in a cloud several tens of metres deep across the surrounding countryside.
The two lapses, though unconnected and different in nature, have raised the question of whether customers can really trust the basic idea behind the cloud that you can buy computing services from the internet, just like gas or water from a utility (see article).
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