hurricaneone Posted March 10, 2004 Report Share Posted March 10, 2004 Anyone know what's the difference between the two views of the universe that have been recently released, one from the Very Large Telescope and one from Hubble's Deep Space Field? I know that the VLT uses red shift and Hubble uses ultralong exposure to 'see', but aren't these just two different methods to view essentially the same thing, galaxies that are the furthest away and so closer (not location-wise but time-wise) to the Big Bang? Any clarification would be welcome. Link to comment Share on other sites More sharing options...
vishnall Posted March 11, 2004 Report Share Posted March 11, 2004 what do you mean VLT uses redshift and hubble uses long exposure???, thats not right, well for your info they both are one and the samehubble maily looks deep into the universe and mainly watches visible light and studies to an extent microwave background of this universe, while chandra x ray telescope uses the same principle as hubble but mainly watches out for x-ray and f-infrared , infrared radiation of starts supernovas and white giants , what you see from hubble might look differently on chandra but they r actually looking at the same, this explains the limitations of the telescopes and not different views! Link to comment Share on other sites More sharing options...
hurricaneone Posted March 11, 2004 Author Report Share Posted March 11, 2004 Hubble (HUDF) VLT It seems they are not the same. Hubble uses standard light and the VLT (Very Large Telescope) located in Chile uses a gravitational lens to measure the redshift of star clusters and galaxies to approiximate their distance from us, or their proximity in time to the Big Bang. So I'm still not understanding why these two separate shots of 13 billion+ years ago were made? Link to comment Share on other sites More sharing options...
vishnall Posted March 11, 2004 Report Share Posted March 11, 2004 i still do not understand what difference you are talking about, its just two different mathematical principles, we all know light bends in the presence of gravity and hence using geometry we can calulate the origin of the light, redshift is taken in to account while calculating the bending of light as redlight bends differently from bluelight depending on their energy levels, redshift occurs when two objects travel away from eachother and the resultant light changes its frequency towars red frequency in the spectrum. every telescope needs to use EM(light, or someother form of EM radiation) to see space/universe whatever is the logic one cannot ignore "redshift" and bending of light in the presence of gravity , while most of the vlc's present use radio waves to see space Link to comment Share on other sites More sharing options...
hurricaneone Posted March 11, 2004 Author Report Share Posted March 11, 2004 I'm not interested in the priciples of how the data was observed, I'm interested in what are the differences in the results or if there are any. Were thy both simply projects to see as far as possible into deep space? Link to comment Share on other sites More sharing options...
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