Welcome Back Hubble, But your End Is Only Delayed!
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Last June 13th, the Hubble Space Telescope gave the astronomical community a fright when its payload computer suddenly stopped working. This prompted the main computer to put the telescope and its scientific instruments into safe mode.
What followed was many tense weeks as the operations team for the HST tried to figure out what the source of the problem was and come up with a strategy for turning Hubble back on.
On Friday, July 17th, after more than a month of checking, re-checking, and attempted restarts, the operations team for Hubble identified the root of the problem and restored power to the telescope’s hardware and all of its instruments.
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These include observations that proved the Universe is expanding at an accelerating rate, which gave to the theory of Dark Energy. Its observation campaigns, like the Deep Field and Ultra Deep Field, provided new insight into the evolution of galaxies and hints about the role Dark Matter played. Its observations of exoplanets have also led to the first atmospheric studies of planets beyond the Solar System
OK, that's in the past, but there is still a question to answer: "How long can Hubble resist in the future?"
According to reports in these hours, the operational life of Hubble has been extended until at least 2025. The reasons are different and it is cited that the subsystems and the main instrumentation should have a reliability of more than 80% for another five years.
Unfortunately, even if there will be no failures of some kind not repairable at a distance, the fate of the space telescope will be marked by his orbital instability. Hubble, in fact, orbits the Earth in the extremely tenuous upper atmosphere, and over time its orbit decays due to drag. If not reboosted, it will re-enter the Earth's atmosphere within some decades, with the exact date depending on how active the Sun is and its impact on the upper atmosphere.
And it seems that this will happen after 2030, after which the telescope will gradually lose altitude and then disintegrate.
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