NASAs Great Observatories


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You may also be interested to know that gyroscope failure is also what eventually took down the Compton Gamma Ray Observatory back in Eventually, every gyro will fail. Hubble has only lasted this long because it has been serviced several times to get new gyroscopes installed.

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NASA’s Chandra X-ray Observatory Goes Offline Just a Week After Hubble

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The lens boosts the brightness of distant background objects. The farthest candidates simply appear as red dots in Hubble photos because of their small size and great distance.

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Embedded in the photo is an arc-like structure that is not only the amplified image of a background galaxy, but an image that has been smeared into a crescent-shape. It is less than 2, light-years across, half the size of the Small Magellanic Cloud, a satellite galaxy of our Milky Way.

The Four Great Observatories

The object is considered prototypical of young galaxies that emerged during the epoch shortly after the big bang. An intensive survey deep into the universe by NASA's Hubble and Spitzer space telescopes has yielded the proverbial needle-in-a-haystack: the farthest galaxy yet seen in an image that has been stretched and amplified by a phenomenon called gravitational lensing.

Though a few other primitive galaxies have been seen at this early epoch, they have essentially all looked like red dots given their small size and tremendous distances. However, in this case, the gravitational field of a massive foreground galaxy cluster not only amplified the light from the background galaxy but also smeared the image of it into an arc about 2 arcseconds long.


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He is presenting his research at the st meeting of the American Astronomical Society in Washington, D. First predicted by Albert Einstein a century ago, the warping of space by the gravity of a massive foreground object can brighten and distort the images of far more distant background objects.

NASAs Great Observatories NASAs Great Observatories
NASAs Great Observatories NASAs Great Observatories
NASAs Great Observatories NASAs Great Observatories
NASAs Great Observatories NASAs Great Observatories
NASAs Great Observatories NASAs Great Observatories
NASAs Great Observatories NASAs Great Observatories

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