Hubble Tool Time Episode 4: Servicing Mission 3A

The video features NASA astronaut John Grunsfeld and engineer Ahmed Rezak discussing the Hubble Space Telescope's challenges and solutions. In 1998, Hubble's gyroscopes failed, leading to a split mission to replace them. The video details the difficulties faced by astronauts during the servicing mission, including working in tight spaces and avoiding damage to sensitive instruments. The team successfully replaced the gyroscopes and made additional upgrades. An innovative tool was developed, inspired by a simple pick stick, to ease the task. The video concludes with a light-hearted exchange.

What was the primary job of the astronauts during the Hubble servicing Mission 3A?

Explain the significance of the rate sensor unit in the Hubble Space Telescope.

Describe the challenges faced by astronauts when replacing the gyroscopes on the Hubble Space Telescope.

What were the consequences if the astronauts accidentally hit the star trackers or the side of the telescope?

How did the astronauts ensure they did not break the Hubble during their mission?

What lessons were learned from the multiple servicing missions of the Hubble Space Telescope?

What innovative tool did John Grunsfeld create to assist with the gyroscope replacement?