NASAのインスタグラム(nasagoddard) - 6月5日 05時09分

Spacewalking Astronaut John Grunsfeld - A close-up of Astronaut John Grunsfeld shows the reflection of Astronaut Andrew Feustel, perched on the robotic arm of the International Space Station and taking the photo. The pair teamed together on three of the five spacewalks during Servicing Mission 4 of the Hubble Space Telescope in May 2009. Credit: NASA

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