In Vernor Vinge's novels FTL travel ( and other advances such as sentient computers ) is only possible if you are more than a certain distance from the galactic centre-which the Solar System, unfortunately, is not.
32.
Later, Trantor gained prominence when the 1940s " Foundation " series first appeared in print ( in the form of astronomical knowledge by retconning its position to be as close to the galactic centre as was compatible with human habitability.
33.
Calleman disagrees that 2012 represents the point of an alignment between the Earth's solstice and the galactic centre which he says would be a purely local phenomenon unique to the Earth and which in any case has already occurred in 1998.
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In 1917, the astronomer Harlow Shapley was able to estimate the Sun's distance from the galactic centre based on the distribution of globular clusters; previously the Sun's location within the Milky Way was by no means well established.
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I'm curious : what's the feature above the galactic centre, visible in X-ray, hydrogen-alpha and microwave, but only vaguely in visible ?-- talk ) 08 : 33, 22 April 2010 ( UTC)
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Both types of carbon-rich star are very rare near to the galactic centre, but make up 10 % 20 % of all the luminous AGB stars in the solar neighbourhood, so that S stars are around 5 % of the AGB stars.
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Because of this gradient, galactic tides may then deform an otherwise spherical Oort cloud, stretching the cloud in the direction of the galactic centre and compressing it along the other two axes, just as the Earth distends in response to the gravity of the Moon.
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In reality, most ordinary stars lie within the galaxy's disk and those stars that lie in the direction of the galactic centre and beyond are thus obscured by gas and dust, whereas globular clusters lie outside the disk and can be seen at much further distances.
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A narrowband imaging survey of the Galactic centre region conducted by the Hubble Space Telescope, ( HST ), Near Infrared Camera, ( NIC ), and Multi Object Spectrometer ( NIMCOS ) revealed LBV G0.120-0.048 as a strong source of Paschen-alpha ( Paschen-? ) which exceeded that of the Pistol star.
40.
The Royal Swedish Academy of Sciences announced on January 19, 2012, that the Crafoord Prize in Astronomy 2012 will be jointly awarded to Reinhard Genzel from the Max Planck Institute for Extraterrestrial Physics, Garching, and Andrea Ghez from the University of California, Los Angeles, USA " for their observations of the stars orbiting the galactic centre, indicating the presence of a supermassive black hole ".
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