ASTRONAUTS Mike Hopkins (left) and Victor Glover work outside the International Space Station on Monday.—AP
ASTRONAUTS Mike Hopkins (left) and Victor Glover work outside the International Space Station on Monday.—AP

CAPE CANAVERAL: A pair of Nasa astronauts ventured out on their second spacewalk in under a week on Monday and completed a four-year effort to modernise the International Space Station’s power grid.

Over the weekend, flight controllers in Houston used the stations big robot arm to replace the last pair of old-style batteries with a single better-quality one. Astronauts Mike Hopkins and Victor Glover needed to put the finishing touches on this newest lithium-ion battery to complete a series of spacewalks that began in 2017.

“Beautiful day. Let’s go for a walk outside,” Mission Control radioed as the spacewalk got off to a late start.

The space station is now equipped with 24 lithium-ion batteries to store power collected by the solar panels. The big, boxy batteries, surpassing 400 pounds each, provide electricity for the orbiting lab when it’s on the night side of Earth. They’re so powerful that only half as many are needed as the old nickel-hydrogen batteries they replaced.

The upgrade took longer than expected after one of the new batteries failed following its installation two years ago and had to be replaced. In all, 14 spacewalks were needed to complete the battery work.

Nasa expects these batteries to last the rest of the space station’s operating life.

Other spacewalking chores Monday for Hopkins and Glover include installing a new camera on the US Destiny lab and replacing parts in the camera system outside the station’s Japanese lab, named Kibo, or Hope in English.

During a spacewalk on Wednesday, the two astronauts made improvements to the European lab, Columbus.

Two more spacewalks will be conducted in about a month to get ready for additional solar panels set for delivery later this year.

Seven astronauts currently live on the space station: four Americans, two Russians and one Japanese.

Published in Dawn, February 2nd, 2021

Opinion

Editorial

IHK resolution
Updated 08 Nov, 2024

IHK resolution

If the BJP administration were to listen to Kashmiris, it could pave the way for the resumption of the political process in IHK.
Climate realities
08 Nov, 2024

Climate realities

THE Air Quality Index in Lahore once again shot past the 1,000-level mark on Wednesday morning, registering at an...
Rule by fear
08 Nov, 2024

Rule by fear

THE abduction of an opposition MNA, as claimed by PTI, is yet another grim episode in Pakistan’s ongoing crisis of...
Trump 2.0
Updated 07 Nov, 2024

Trump 2.0

It remains to be seen how his promises to bring ‘peace’ to Middle East reconcile with his blatantly pro-Israel bias.
Fait accompli
07 Nov, 2024

Fait accompli

A SLEW of secretively conceived and hastily enacted legislation has achieved its intended result: the powers of the...
IPP contracts
07 Nov, 2024

IPP contracts

THE government expects the ongoing ‘negotiations’ with power producers aimed at revising the terms of sovereign...