Astronauts Drew Morgan and Christina Koch floated back outside the International Space Station Friday and completed work to replace six aging batteries with three more powerful units in one of the lab's eight solar power circuits. Three more spacewalks are planned over the next two weeks to replace another six batteries in an adjacent circuit.
The spacewalk began amid news from Moscow that legendary cosmonaut Alexei Leonov, the first human to walk in space in 1965 and commander of the Soyuz spacecraft that docked with a NASA Apollo capsule in 1975, had died after a long illness. He was 85.
"With our colleagues safely back inside having completed their spacewalk today, we would like to acknowledge that this is a bittersweet day for all of us on the International Space Station," Jessica Meir said after Morgan and Koch returned to the Quest airlock to wrap up a 6-hour 45-minute spacewalk.
"Although we mourn his passing, it is somewhat fitting that Leonov left us on the day of a spacewalk. His 12-minute excursion outside the Voskhod 2 spacecraft more than a half century ago began a chapter in human spaceflight that brought us to the moon and which will bring the world to distant ports of exploration in the cosmos in the years ahead."
The two-time Hero of the Soviet Union was a widely respected elder statesman in the international space community, honored by spacewalking cosmonauts during an excursion outside the space station earlier this year. A memorial service is planned for Oct. 15, according to his assistant.
Morgan and Koch switched their spacesuits to battery power at 7:38 a.m. EDT to officially kick off the 220th space station assembly and maintenance EVA since construction began in 1998. The outing came 35 years to the day after Kathy Sullivan became the first American woman to walk in space during a flight aboard the shuttle Challenger.
After making their way to the far left end of the station's power truss, half a football field away from the lab's pressurized living compartments, Koch and Morgan resumed work they started Oct. 6 when they removed three older nickel-hydrogen batteries and installed two of the more efficient li-ion units.
Because one new battery replaces two of the older models, the astronauts also are installing and wiring in six adapter plates where older batteries were removed.
The space station is equipped with eight huge solar array wings arranged in pairs, four on each end of the power truss. Each pair of wings is equipped with an integrated electronics assembly, or IEA, that originally were loaded with 12 nickel-hydrogen batteries each to provide electricity when the lab complex flies through Earth's shadow.
Each IEA services two of the station's eight electrical channels.
To keep the station operating at peak efficiency through the 2020s, NASA is in the process of replacing all 48 of the original batteries with 24 of the more powerful lithium-ion models. Two sets of six were installed in 2017 and 2018 for the left and right inboard arrays and the third set is being installed this month on the far left side of the truss.
A final set of six will be delivered to the space station next year for the far right side solar arrays.
During their first spacewalk last Sunday, Morgan and Koch removed three of the six nickel-hydrogen batteries that fed power channel 2B and installed two li-ion replacements. By the end of their second EVA, the astronauts had removed the remaining three nickel-hydrogen units and installed channel 2B's third and final li-ion battery, along with the required adapter plates.
With their primary tasks complete, the spacewalkers carried out a few "get-ahead" tasks that will save time during the next spacewalk in the series, this one by Morgan and Meir, next Wednesday. The three remaining excursions will be devoted to servicing power channel 4B and carrying out additional get-ahead tasks as time permits.
Read the original post:
- Fermi Telescope Caps First Year With Glimpse of Space-Time - November 8th, 2009 [November 8th, 2009]
- Antarctic Airborne Science Mission Nears Mid-Point - November 8th, 2009 [November 8th, 2009]
- NASA Awards Education Research Grants to Minority Universities - November 8th, 2009 [November 8th, 2009]
- New Celestial Map Gives Directions for GPS - November 8th, 2009 [November 8th, 2009]
- NASA Invites Reporters to Tranquility Node Ceremony at Kennedy - November 8th, 2009 [November 8th, 2009]
- Happy Halloween - November 8th, 2009 [November 8th, 2009]
- NASA's Fermi Telescope Detects Gamma-Ray From "Star Factories" in Other Galaxies - November 8th, 2009 [November 8th, 2009]
- NASA Announces Advisory Council Chairs and Committee Structure - November 8th, 2009 [November 8th, 2009]
- NASA and X Prize Announce Winners of Lunar Lander Challenge - November 8th, 2009 [November 8th, 2009]
- MESSENGER Spacecraft Reveals More Hidden Territory on Mercury - November 8th, 2009 [November 8th, 2009]
- Successful Flight Through Enceladus Plume - November 8th, 2009 [November 8th, 2009]
- Education Secretary Hosts DC Students for Talk with Space Station - November 8th, 2009 [November 8th, 2009]
- Operation Ice Bridge Studies Antarctic Sea Ice - November 8th, 2009 [November 8th, 2009]
- NASA West Point Welcomes Home One of Their Heroes - November 8th, 2009 [November 8th, 2009]
- NASA Spitzer Observes a Chaotic Planetary System - November 8th, 2009 [November 8th, 2009]
- X-38 Crew Return Vehicle Finds New Home - November 8th, 2009 [November 8th, 2009]
- Frost-Covered Phoenix Lander Seen in Winter Images - November 8th, 2009 [November 8th, 2009]
- Have some faith He is doing his best - November 8th, 2009 [November 8th, 2009]
- The Cross - November 8th, 2009 [November 8th, 2009]
- Spring Bloom in New Zealand Waters - November 8th, 2009 [November 8th, 2009]
- NASA Hubble image showcases star birth in M83, the Southern Pinwheel - November 8th, 2009 [November 8th, 2009]
- Take Me Out to the Ballpark - On Mars! - November 8th, 2009 [November 8th, 2009]
- Poisk Poised for Live NASA TV Space Station Docking - November 8th, 2009 [November 8th, 2009]
- Ceremony Reset for ESA Handover of Tranquility to NASA - November 8th, 2009 [November 8th, 2009]
- NASA Reproduces a Building Block of Life in Laboratory - November 8th, 2009 [November 8th, 2009]
- Now Online: Aeronautics Goes E-Book - December 12th, 2009 [December 12th, 2009]
- Water on the Moon, Drought on Earth: NASA Experts Available for Radio And Podcast Interviews During Major Science Meeting - December 12th, 2009 [December 12th, 2009]
- Launch of NASA's Wise Spacecraft Delayed Until Dec. 14 - December 12th, 2009 [December 12th, 2009]
- Connecticut Students Set for Cosmic Conversation with Space Station Commander - December 12th, 2009 [December 12th, 2009]
- Magnetic Dance of Titan and Saturn To Be Main Attraction during Flyby - December 12th, 2009 [December 12th, 2009]
- Hubble's Deepest View of Universe Unveils Never-Before-Seen Galaxies - December 13th, 2009 [December 13th, 2009]
- Earth's Moon - December 13th, 2009 [December 13th, 2009]
- How do you Make a Helicopter Safer to Fly? You Crash One. - December 13th, 2009 [December 13th, 2009]
- Physicist Earns Title as Kennedy's Best - December 13th, 2009 [December 13th, 2009]
- Hubble Unveils Never-Before-Seen Galaxies - December 13th, 2009 [December 13th, 2009]
- Saturn's Mysterious Hexagon Emerges from Winter Darkness - December 13th, 2009 [December 13th, 2009]
- Fermi Sees Brightest-Ever Blazar Flare - December 13th, 2009 [December 13th, 2009]
- Magnetic Power Revealed in Gamma-Ray Burst Jet - December 13th, 2009 [December 13th, 2009]
- Just 5 Questions: Aerosols - December 13th, 2009 [December 13th, 2009]
- Hometown Heroes 2009: Astronaut & Terrible Towel Return to Pittsburgh - December 13th, 2009 [December 13th, 2009]
- Garver Honors Four for Saving the Life of a Fifth at NASA Langley - December 13th, 2009 [December 13th, 2009]
- Administrator Bolden Speaks at AAIA-WIA Luncheon - December 13th, 2009 [December 13th, 2009]
- Best (Meteor) Shower of 2009 - No Towel Required - December 13th, 2009 [December 13th, 2009]
- NASA Making Government More Accessible With Cutting-Edge Use Of New Media - December 13th, 2009 [December 13th, 2009]
- Scarce Water, Our Quiet Sun and Space Rocks Among NASA News Highlights at American Geophysical Union Meeting - December 13th, 2009 [December 13th, 2009]
- Press Credentials Deadlines Set for Next Space Shuttle Flight - December 13th, 2009 [December 13th, 2009]
- Reddish Dust and Ice Migration Darken Saturn's Moon Iapetus - December 13th, 2009 [December 13th, 2009]
- Galaxy Collision Switches on Black Hole - December 13th, 2009 [December 13th, 2009]
- I’m watching the launch of NASA’s WISE spacecraft - December 13th, 2009 [December 13th, 2009]
- SOFIA Aloft - December 13th, 2009 [December 13th, 2009]
- Guide to the International Space Station Laboratory Racks Interactive - December 14th, 2009 [December 14th, 2009]
- Freezing WISE's Hydrogen - December 14th, 2009 [December 14th, 2009]
- Local High School Wins Invention Challenge - December 14th, 2009 [December 14th, 2009]
- WISE Ready to Soar Into Space - December 14th, 2009 [December 14th, 2009]
- NASA Data Reveal Major Groundwater Loss in California's Heartland - December 15th, 2009 [December 15th, 2009]
- NASA Looks for Safer Icing Forecast For Pilots - December 15th, 2009 [December 15th, 2009]
- Challenges of Living and Working Aboard the Space Station: NASA Astronaut Nicole Stott Available for TV Interviews - December 15th, 2009 [December 15th, 2009]
- NASA Astronaut, Food Scientist Available for Interviews about Holiday Feasts in Space - December 15th, 2009 [December 15th, 2009]
- NASA Launches Web Site for Teenagers That Want More Class - December 15th, 2009 [December 15th, 2009]
- A Unique Geography -- and Soot and Dust -- Conspire Against Himalayan Glaciers - December 15th, 2009 [December 15th, 2009]
- New Study Turns Up the Heat on Soot's Role in Himalayan Warming - December 15th, 2009 [December 15th, 2009]
- NASA's WISE Eye on the Universe Begins All-Sky Survey Mission - December 15th, 2009 [December 15th, 2009]
- NASA Offers Sound Clips for Radio, Online Newscasters - December 17th, 2009 [December 17th, 2009]
- NASA Gets Up-Close Look at Far Corner of the Globe - December 17th, 2009 [December 17th, 2009]
- Orion Launch Abort System Attitude Control Motor Test-fired - December 17th, 2009 [December 17th, 2009]
- Hubble Finds Smallest Kuiper Belt Object Ever Seen - December 17th, 2009 [December 17th, 2009]
- The Dark Side of Carbon - December 17th, 2009 [December 17th, 2009]
- R97UYEA6HD8W - December 17th, 2009 [December 17th, 2009]
- NASA's AIM Satellite and Models are Unlocking the Secrets of Mysterious "Night-Shining" Clouds - December 17th, 2009 [December 17th, 2009]
- Classroom Learning Takes Off with NASA-Funded Education Projects - December 17th, 2009 [December 17th, 2009]
- NASA Buys Additional Space Shuttle Reusable Solid Rocket Motors - December 17th, 2009 [December 17th, 2009]
- Searching for New Vaccines and Studying Butterflies in Space; NASA Offers TV Interviews about Latest Space Station Science Research - December 17th, 2009 [December 17th, 2009]
- NASA Partners with Saudi Arabia on Moon and Asteroid Research - December 17th, 2009 [December 17th, 2009]
- New Results from a Terra-ific Decade in Orbit - December 17th, 2009 [December 17th, 2009]
- Deposits in Martian Trough Point to Complex Hydrological Past - December 17th, 2009 [December 17th, 2009]
- NASA Outlines Recent Greenhouse Gas Research - December 17th, 2009 [December 17th, 2009]
- Unexpected Wheel-Test Results - December 17th, 2009 [December 17th, 2009]
- Solar Storms and Radiation Exposure on Commercial Flights - December 17th, 2009 [December 17th, 2009]
- Global Digital Elevation Model - December 17th, 2009 [December 17th, 2009]
- Hubble's Festive View of a Grand Star-Forming Region - December 17th, 2009 [December 17th, 2009]