“Oscar Romeo Four, India, Sierra Sierra, This is Echo India One, India Sierra Sierra. Over.”

“Oscar Romeo Four, India, Sierra Sierra, This is Echo India One, India Sierra Sierra. Over.”

A spacewalking astronaut successfully replaced a blurry camera outside the International Space Station on Friday, but had to contend with a misfunctioning jetpack and a frayed safety tether.

The International Space Station's Joe Acaba, the first astronaut of Puerto Rican heritage, has been affected by two hurricanes - even in orbit.

Two astronauts who were teaching maths and science to middle school students just five years ago went on a spacewalk together, but could not free a jammed equipment shelf no matter how hard they tried.