![Two astronauts, attached to a robotic arm, service Hubble above the Earth, which takes up the whole background.](https://science.nasa.gov/wp-content/uploads/2022/05/carousel-sm3a-1-jpg.webp?w=4096&format=png)
Hubble SM 3A EVA
Steven L. Smith (right) and John M. Grunsfeld (left) use the RMS robotic arm to perform servicing tasks on the temporarily-captured Hubble Space Telescope (HST) during the third HST servicing mission (SM 3A), in December 1999.
Credits: NASA
Image CreditNASA
Size640x426px