Nasa astronauts to embark on ‘seven hour’ ISS Spacewalk – how to watch live

TWO astronauts are about to embark on a spacewalk from the International Space Station and you can watch them live.

The walk this Friday will be the first of two missions to replace some ageing batteries.

ISS spacewalk: What is it and which astronauts are walking?

Nasa astronauts Chris Cassidy and Robert Behnken will be going on a spacewalk today to replace old nickel-hydrogen batteries outside the ISS.

Behnken’s name may sound familiar because he was one of the astronauts on SpaceX’s first manned launch to the ISS back in May.

Nasa said: “The spacewalking astronauts will replace aging nickel-hydrogen batteries for one of two power channels on the far starboard truss (S6 Truss) of the station with new lithium-ion batteries that arrived to the station on a Japanese cargo ship last month.

“The battery replacement work is the culmination of power upgrade spacewalks that began in January 2017.”

Battery replacement up in space is a very complex job.

ISS spacewalk: Date, start time and how to watch

Nasa TV is providing live coverage of the event today, Friday June 26.

Live coverage starts at 10am GMT (6am EDT).

However, the spacewalk itself is scheduled to begin at 11:35am GMT (7:35am EDT).

They’ll be plenty of time to watch it though as it could last as long as seven hours.

Astronaut Cassidy will be wearing a spacesuit with red stripes.

Behnken will be in a spacesuit without stripes.

What is the ISS?

Here's what you need to know about the International Space Station…

  • The International Space Station, often abbreviated to ISS, is a large space craft that orbits Earth and houses astronauts who go up there to complete scientific missions
  • Many countries worked together to build it and they work together to use it
  • It is made up of many pieces, which astronauts had to send up individually on rockets and put together from 1998 to 2000
  • Ever since the year 2000, people have lived on the ISS
  • Nasa uses the ISS to learn about living and working in space
  • It is approximately 250 miles above Earth and orbits around the planet just like a satellite
  • Living inside the ISS is said to be like living inside a big house with five bedrooms, two bathrooms, a gym, lots of science labs and a big bay window for viewing Earth

In other space news, alien life may be lurking in hidden Earth-like ocean on nearby Jupiter moon Europa.

Mysterious signals have been coming from space for over 500 days and scientists aren’t sure why.

And, Elon Musk has said SpaceX’s Starship rocket, which he hopes will put Americans on Mars, is now the company’s “top priority”.

Will you be watching the spacewalk? Let us know in the comments…

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