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Specialists investigate leak on Russian ISS segment

Written and illustrated by Anatoly Zak | Editor: Alain Chabot

After weeks of painstaking search, cosmonauts aboard the International Space Station have found the elusive source of an air leak in the aft section of the Zvezda Service Module. In the meantime, specialists on the ground brain-stormed the actions necessary to close the gap and began looking for the culprit which could cause a potentially dangerous breach.

space plane


New page (No. 150): Russia considers a robotic mini-shuttle

New page (No. 149): Russia begins work on a nuclear lunar power station

Update: NASA plans long and short commercial missions

New page (No. 148): Orel's command module experiences major re-shaping

New page (No. 147): Service systems aboard MLM Nauka

New page (No. 146): Partners consider major rearrangement in Gateway modules

New page (No. 145): Russia mulls new station design to compete in commercial race

New page (No. 144): Russia boosts the capability of its super-heavy rocket

New page (No. 143): Russia debates space exploration priorities

Update: Roskosmos opens sea route to Vostochny

New page (No. 142): Orel changes its shape ahead of construction

Update: Roskosmos assumes NASA crew capability throughout 2021

Update: Russia all but withdraws from NASA-led Gateway

New page (No. 141): Science aboard Nauka module

New page (No. 140): Structural design of the MLM Nauka

New page (No. 139): Organizational structure of the MLM Nauka project

New page (No. 138): Baikonur prepares for Nauka

New page (No. 137): Post-docking operations with Nauka

New page (No. 136): Spacewalk to prepare Pirs' departure from ISS

New page (No. 135): Can Russia and China take over the Moon?

Update: Nauka's departure to Baikonur slips to middle of August

New page (No. 134): Gateway considered for a "safe haven" role in lunar orbit

New page (No. 133): RD-809K: A Ukrainian engine advances Saudi space ambitions

Update: Nauka packs for the trip to Baikonur

New page (No. 132): Can Russia build a returnable rocket?

New page (No. 131): Two variants of escape rockets proposed for the Orel spacecraft

Update: Nauka to undergo second phase of vacuum tests

New page (No. 130): Roskosmos continues work on NEM module

New page (No. 129): Soyuz prepares for new tourists

New page (No. 128): Nauka's fate hangs on a few valves

Update, 2020 June 12: Nauka's launch planning zeroes-in on the end of April 2021

New page (No. 127): Orion lacks life support for the Artemis lunar landing

New page (No. 126): Roskosmos studies new station module

Update, 2020 June 2: Rogozin lauds the ROS project

Update, 2020 May 29: The Orel spacecraft gets multiple design changes

Update, 2020 May 27-28: Nauka's launch pushed back to May 2021, shipment to Baikonur to July 20

Update, 2020 May 27: NASA to end Roskosmos' ISS crew transport monopoly

New page (No. 125): Roskosmos begins mass production of the RD-191 engine

New page (No. 124): Early Gateway modules merge

Update, 2020 May 18: Nauka's launch pushed back to May 2021

New page (No. 123): Angara pad progresses in Vostochny

New page (No. 122): Ground tests to continue after first launch of Soyuz replacement

New page (No. 121): Reconfiguring Russian Segment of ISS after Nauka's launch

New page (No. 120): How 5M was expected to land on Mars

New page (No. 119): How risky is the Gateway?

New page (No. 118): Russian industry puts forward new concepts of the Soyuz-6 rocket

New page (No. 117): Upgrading Soyuz MS to indigenous electronics

New page (No. 116): Super-heavy launch complex changes drastically in early design

New page (No. 115): The Orel spacecraft to get drastic changes in its landing system

Update, 2020 April 3: Gateway's first habitat takes shape

New page (No. 114): Preparing MLM Nauka at launch site

Update, March 24: Additional ground tests planned for Orel spacecraft

Update, March 23: Nauka developer struggles to maintain schedule

New page (No. 113): Lunar Gateway fades away

Update: ExoMars postponed from 2020 to 2022

New page (No. 112): Proton hit with a new production problem

New page (No. 111): History of the European Robotic Arm, ERA

Update: Major new goals to be added to the first Orel mission

New page (No. 110): A Cold War jewel gets a second look

New page (No. 109): Building the Soyuz replacement

New page (No. 108): Roskosmos plans space "dreadnought"

New page (No. 107): Second test mission of the PTK Orel spacecraft

New page (No. 106): Roskosmos mulls Plan B for its cosmonauts

New page (No. 105): Missing pieces of the lunar puzzle

New page (No. 104): Russian lunar service module still on the agenda

New page (No. 103): Refining super-rocket's architecture

New page (No. 102): Crunch time for ExoMars in 2020

Update, 2020 Jan. 8: ESA to repeat critical ExoMars parachute tests

New page (No. 101): Nauka still has a chance for launch in 2020

New page (No. 100): How the super-heavy rocket project is organized

Update, December: Russia to seek bigger role in the cis-lunar Gateway

New page (No. 99): NASA drafts new lunar Gateway assembly scenarios in 2019

Update, December 13: Angara production details

New page (No. 98): Preparing Russian Segment of ISS for Nauka's liftoff

Update, December 2: NASA drafts memorandum of understanding for partners on Gateway

Update, December 2: Launch of Gateway airlock postponed until 2028, moved to a Russian rocket

New page (No. 97): Intensive ground testing program to pave the way to Soyuz replacement

New page (No. 96): NASA refines cis-lunar habitat's design

New page (No. 95): ISS to enter the 2020s

New page (No. 94): Roskosmos drags its feet on Gateway contribution

New page (No. 93): Roskosmos promises a 140-ton super-launcher

New page (No. 92): Europe's Gateway component becomes a stand-alone module

New page (No. 91): Russia plans new version of the famed RD-180 engine

Update: Two logistics module designs considered for Gateway

New page (No. 90): Tackling Angara's growing pains

New page (No. 89): New test launch proposed for next-generation spacecraft

Update: MLM module is penciled for launch on November 30, 2020

New page (No. 88): International cis-lunar habitat changes shape

Update: Spektr-RG reaches its destination

New page (No. 87): The Transfer Element for the piloted lunar lander

New page (No. 86): eROSITA team investigates a potential hack... by space rays

Update: Proton's flight manifest

New page (No. 85): The Descent Element for the piloted lunar lander

Update: Proton's enters long road to retirement

New page (No. 84): The Ascent Element for the piloted lunar lander detailed

New page (No. 83): Vostochny to get a large vacuum chamber

Update: First cis-lunar Gateway element detailed

Update: Putin approves the new rocket strategy

Update: Russia's new-generation spacecraft changes rocket again, gets new name

New page (No. 82): HALO: NASA's latest candidate for the first cis-lunar habitat

Update: Russia is back at the negotiating table on the lunar Gateway

Update: Proton might remain with a single pad after 2020

New page (No. 81): Robot Fedor: Future of space exploration or a high-tech boondoggle?

New page (No. 80): Putin to review Russian space program

Update: ExoMars suffers failure in second high-altitude parachute test

Updates (August 7, 11): Spektr-RG conducts orbit corrections; ART-XC telescope captures its first (scientifically meaningful) light

New page (No. 79): First look at the RBKA satellite

New page (No. 78): Russia prepares new push into satellite remote sensing

New page (No. 77): Vostochny's industrial zone gears up for the Angara project

New page (No. 76): Planning begins for Luna-29 mission

New page (No. 75): Spektr-RG sails to its deep-space destination

New page (No. 74): Russia plans to reshape, extend its lunar robotic strategy

New page (No. 73): What parachute problems mean for ExoMars?

New page (No. 72): Russian lunar base mockup at PAS-2019 explained

New page (No. 71): How Spektr-RG came back to life

Update: Roskosmos displays lunar base mockup at Le Bourget

New page (No. 70): The original Spektr-RG satellite

Update: Spektr-RG reaches launch pad

New page (No. 69): RD-8: A veteran engine begins new life

Update: Spektr-RG meets its rocket

Update: Roskosmos to tackle a multitude of tasks in Nauka module repairs

Update: Roskosmos head chairs meeting on the Soyuz-5 project

Update: All options are back on the table for the troubled Nauka module

New page (No. 68): Luna-Grunt to test cosmonauts' lunar landing platform

New page (No. 67): Drakar lunar tug poses old questions

Update: RD-171MV engine (Roskosmos promises first test this year)

New page (No. 66): Roskosmos pushes forward with the Soyuz-5 rocket project

New page (No. 65): Khrunichev promises surge of Proton launches in 2019 as production to wind down

New page (No. 64): ExoMars rover to leave for the Red Planet from an unusual orbit

Update: PTK in 2019: Russia begins cutting metal for Soyuz replacement

New page (No. 63): Russian lunar lander experience, Part 1

Update: Spektr-RG to undergo flight readiness review

Update: Roskosmos is finalizing plan for Nauka's repairs

New page (No. 62): ExoMars project struggles to stay on track for the 2020 launch

Update: Development of the RD-815 demonstrator

Update: Adapting the Gateway for the accelerated lunar landing

Update: Final preparations to begin for Spektr-RG

New page (No. 61): MLM Nauka faces ultimate deadline

New page (No. 60): First test mission of the PTK Federatsiya spacecraft

Update: New Gateway refueling architecture gets traction

New page (No. 59): First piece of international near-lunar station to enter development

New page (No. 58): New era dawns for ISS (ISS in 2019)

Update: Russian Moon plans hit another stumble

New page (No. 57): Lunar Gateway reaches first major design milestone, but Russia is no show

Update: Roskosmos chooses between June and July launch for Spektr-RG

Update: Roskosmos to continue Spektr-R recovery attempts

New page (No. 56): Roskosmos considers contributing cargo ship for cis-lunar station

Update: Roskosmos charts roadmap to super-heavy rocket

New page (No. 55): The Don super rocket - the ultimate goal of the Russian space program

New page (No. 54): Spektr-RG enters final stretch

New page (No. 53): Roskosmos picks final architecture for super rocket

New page (No. 52): First look at the Soyuz-7/Volga rocket concept

Update: Sevastyanov back at the helm of RKK Energia

New page (No. 51): Roskosmos looks at aerobarking lunar transport

New page (No. 50): Federatsiya faces new delays

New page (No. 49): Russia's Spektr-R orbital telescope stops observations

New page (No. 48): Russian space leaders to discuss cooperation with US on the Moon

New page (No. 47): Canada to contribute a new-generation robotic arm for the cis-lunar station

Update: Dilemmas still facing the Russian super-rocket program

Update: First details on descent vehicles for human lunar expeditions emerge

New page (No. 46): Ukraine helps South Korea to develop indigenous space rocket

Update: New funding program planned for lunar exploration

New page (No. 45): NASA solicits international proposals on lunar exploration

Update: Moment of truth for the Russian super rocket

New page (No. 44): Super-heavy rocket: Variant 3

New page (No. 43): Cis-lunar team works on improved rendezvous systems

New page (No. 42): Russia's latest super-rocket architecture detailed

Update: Roskosmos favors new architecture for super rocket

Update: Soyuz-5 to be renamed Irtysh

Update: Russian design to be adopted for airlock architecture

New page (No. 41): Spacewalk to investigate Soyuz hole stirs major controversy

New page (No. 40): NASA begins work on a lunar lander

New page (No. 39): NASA drafts new cis-lunar station assembly scenarios

New page (No. 38): Scheduling cis-lunar station work

New page (No. 37): How far can the cis-lunar station go?

Update: NASA outlines lunar gateway development milestones

Update: NASA gets virtual model of Russia's cis-lunar lab

Update: NASA sponsors five cis-lunar module prototypes

New page (No. 36): Russia quietly drafts lunar orbital station of its own!

New page (No. 35): How much will the cis-lunar station cost?

Update: Cis-lunar station partners meet for crucial project review

New page (No. 34): How the cis-lunar station will be assembled

New page (No. 33): Europe ponders architecture of its first cis-lunar module

New page (No. 32): Russia re-designs PTK Federatsiya spacecraft for multiple docking ports

New page (No. 31): NASA, partners debate refueling in cis-lunar space

Update: Kremlin to bail out its troubled rocket industry

New page (No. 30): Super-heavy rocket: Variant 2

New page (No. 29): Launch facility for the super-heavy rocket in Vostochny

New page (No. 28): Design and schedule for the first piece of the cis-lunar station detailed

New page (No. 27): Russian rocketry at cross-roads

New page (No. 26): Super-heavy rocket: Variant 1

New page (No. 25): Japan mulls Falcon Heavy-launched cargo ship for cis-lunar station

Update: Russia studies different ways to contribute to cis-lunar station

Update: Federatsiya begins parachute tests, faces new delays

New page (No. 24): Development of the super-heavy rocket begins

New page (No. 23): US, Russia cooperate on a near-lunar spacesuit

Update: NASA works on interior of near-lunar habitat

Update: Gateway partners meet in Houston

New page (No. 22): OneWeb: Proton's last hope?

New page (No. 21): NASA studies extra habitat for the near-lunar station

New page (No. 20): NASA drafts Logistics Augmentation Module for the near-lunar station

New page (No. 19): New landing propulsion system for PTK Federatsiya spacecraft

New page (No. 18): New BAS escape rocket for the Federatsiya spacecraft

Update: Rogozin's stance: Will US-Russian cooperation continue?

New page (No. 17): Federatsiya to set sail without its key features

Update: Roskosmos conducts negotiations with China

New page (No. 16): Emergency Escape System, SAS, for the Federatsiya spacecraft

New page (No. 15): Landing Solid-propellant Propulsion System, PTDU, for the Federatsiya spacecraft

Update: NASA to consider inflatable structures for LOP-G

Update: Utilization Element evolves quickly

New page (No. 14): NASA and its partners study cargo deliveries to lunar orbit

New page (No. 13): Russia considers cooperation with China in human space flight

Update: Development of the near-lunar station in 2018

New page (No. 12): RD-815: inside story and latest developments

New page (No. 11): Utilization Element for Lunar Orbital Platform, LOP-G

New page (No. 10): Development of the Airlock Module for near-lunar station in 2018

New page (No. 9): Development of the near-lunar station in 2018

New page (No. 8): Soyuz-5 rocket development in 2018

New page (No. 7): NEM-2 tourist module

New page (No. 6): Second stage of the Soyuz-5 rocket

New page (No. 5): Science airlock for Deep Space Gateway

New page (No. 4): First stage of the Soyuz-5 rocket

New page (No. 3): Aggregate Compartment of the PTK NP spacecraft

New page (No. 2): Transportation of the Soyuz-5 launch vehicle

New page (No. 1): RD-171MV engine


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