NASA spacewalk: How to watch the ISS mission live:
Although today’s space mission is taking place 250 miles (400km) over Earth, you can catch all the action from the comfort of your home.
NASA TV is providing live coverage of the event today, Wednesday, July 1.
The spacewalk itself is planned to begin at 12.30pm BST (7.30am ET).
The space station is equipped with four huge solar array wings, each one feeding electricity into two circuits, or power channels.