The Hubble deep Field - the deepest look into the universe yet
The Hubble Deep Field
, also known as HDF, is a picture of a small region in the constellation Ursa Major. The picture was compiled by a number of observations made on the constellation by the Hubble Space Telescope. The telescope took over 300 different exposures over ten consecutive days, which made it possible to assemble the image.
The HDF contains about 3,000 objects, most of which are young galaxies that little are known about. Because the Hubble Deep Field was able to capture something never before seen, it has become a landmark image for those who study the universe, and has created curiosity from many.
How They Did It
The Hubble Space Telescope was perfect for capturing this breath-taking image, because it can study space to a level of detail that is not possible from the ground. The telescope is above the atmosphere, where it can avoid airglow that can make pictures less visible. The Hubble Space Telescope can take more detailed images of distant galaxies than any previous telescope, and has triggered research about how distant galaxies evolve.
What It Shows
The image captured several distant and faint galaxies. There were almost 3,000 galaxies that were distinct in the image, some which were irregular and some spiral. Only a handful of foreground stars are in the image, and the majority of images are very distant galaxies. The random blue dots in the picture are related to the nearby galaxies, acting as chains or arcs. There also may be some white dwarfs among the many objects in the Hubble Deep Field, since recent research has shown that white dwarfs can turn blue, as they get older.
Theories about the HDF
Because The Hubble Deep Field was such a great discovery in the study of the universe, many have been researching and developing theories about what is going on out there. There have been more than 400 papers on the topic of the Hubble Deep Field, some about the large number of galaxies with high redshift values. Also, because the galaxies in the image were at different stages of evolution, researches were able to determine the rate of star formations over the entire lifetime of the galaxies.
More and more research is being done on this image, making it possible to create theories and experiments relating to the universe. As more advanced technology is created, clear pictures of the universe will be more common, making it easier to study the various galaxies out there. Other telescopes have taken additional images since the HDF came about, and researchers plan to take more as the resources become available.
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