Astronauts repairing the hubble space telescope
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Hubble Space Telescope Repairs: Astronaut Spacewalks and Upgrades
Astronaut Spacewalks and Repair Missions
Astronauts have played a crucial role in maintaining and upgrading the Hubble Space Telescope through a series of challenging spacewalks. Over five servicing missions between 1993 and 2009, astronauts performed complex repairs and upgrades, often working outside the shuttle for more than six hours at a time. These missions required astronauts to operate in bulky suits and gloves, making the delicate work similar to "brain surgery performed in boxing gloves" Banks2009Potter2024Karlin2010. The design of Hubble, with accessible equipment bays and maintenance workstations, made these repairs possible despite the harsh conditions of space Potter2024Sullivan2019.
Key Repairs and Upgrades
The repairs included replacing nearly every major component except the telescope's mirrors and outer skin. Astronauts installed new scientific instruments, replaced gyroscopes, upgraded computers, and fixed power supply issues. For example, the third servicing mission (SM3A) involved replacing gyroscopes, a guidance sensor, transmitters, and installing a much faster computer . Another significant repair was the restoration of the Space Telescope Imaging Spectrograph (STIS), which required astronauts to use specialized techniques to replace failed power supply boards during spacewalks . These upgrades improved Hubble's observational power by up to 100 times and extended its operational life well beyond the original 15-year plan Banks2009Potter2024Shayler2016.
Training and Preparation for Spacewalks
Astronauts underwent extensive training to prepare for these missions. They practiced with real flight hardware, simulators, and underwater environments to mimic the weightlessness of space. This training ensured they could handle the complex tasks required during extravehicular activities (EVAs), such as using specialized tools and working with orbital replacement units Nasa2017Werneth2001.
Impact and Legacy of Hubble Repairs
The successful repairs and upgrades have allowed Hubble to continue providing groundbreaking scientific discoveries, such as revealing thousands of galaxies and measuring the expansion of the universe Aurora1995Sullivan2019. The skills and techniques developed for Hubble servicing have also influenced the construction and maintenance of the International Space Station and will benefit future human and robotic missions in space Shayler2016Werneth2001.
Conclusion
Astronauts' ability to repair and upgrade the Hubble Space Telescope in orbit has been a remarkable engineering and human achievement. Their work has not only extended Hubble's life and scientific capabilities but also set new standards for space servicing missions, ensuring that Hubble remains a vital tool for exploring the universe Banks2009Potter2024Shayler2016+1 MORE.
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Technical aspects of the Space Telescope Imaging Spectrograph Repair (STIS-R)
The STIS-R repair, which involves surgically replacing the failed LVPS2 board, is a feasible and important Hubble servicing mission, restoring full scientific functionality to the imaging spectrograph on Side 2.
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