Russia's "Progress MS-31" spacecraft will be publicly broadcasted as it blasts off towards the International Space Station (ISS) on various digital screens

Russia's "Progress MS-31" spacecraft will be publicly broadcasted as it blasts off towards the International Space Station (ISS) on various digital screens

Article Title: Progress MS-31 Delivers Essential Supplies to ISS for Expedition 73

In the sweltering heat of Vladivostok, where the air temperature reaches a scorching +31°C, the ground temperature plunges to a chilling -52°C[1]. Meanwhile, up in the cold void of space, the International Space Station (ISS) is receiving a much-needed resupply.

The Progress MS-31 cargo spacecraft, launched on July 3, 2025, successfully docked with the Russian segment’s Poisk module on July 5[2]. This crucial delivery contains approximately 2,625 kg of supplies for Expedition 73 and its crew[1][2].

The cargo breakdown includes 1,205 kg of dry cargo, which consists of food, clothing, and equipment for various scientific experiments aboard the ISS. There's also 950 kg of fuel for the ISS thrusters to support station maneuvering and orbital maintenance, 420 kg of drinking water, and 50 kg of nitrogen to replenish and maintain the atmospheric pressure balance inside the ISS modules[1].

The Progress MS-31 launched atop a Soyuz 2.1a rocket from the Baikonur Cosmodrome in Kazakhstan. This resupply mission is part of an established routine by Roscosmos to keep the ISS operational and habitable, contributing to sustained human presence in space[1][2][5].

At the time of Progress MS-31's arrival, the ISS was hosting the private Axiom Mission 4 crew and preparing for upcoming crew rotations with Crew-11[1]. The delivery comes at an opportune moment, ensuring the Expedition 73 crew has necessary consumables, scientific tools, and propellant to continue mission activities effectively.

Expedition 73 consists of Roscosmos cosmonauts Sergei Ryzhikov, Alexei Zubricky, and Kirill Peskov. During the mission, the crew members will conduct 50 planned experiments[6]. They were sent into space on April 8[7].

The Progress MS-31 spacecraft's launch vehicle carries a special emblem commemorating the 50th anniversary of the joint Soviet-American Apollo-Soyuz Test Project, initiated on July 15, 1975[3]. That historic event marked the first instance of fruitful cooperation between the two nations, symbolising a significant milestone in space exploration[4].

Back on Earth, the extreme heat in Primorye is causing problems of its own. The heat, coupled with rain, is making it hard to breathe[1]. However, for the Expedition 73 crew, the supplies delivered by the Progress MS-31 spacecraft will ensure they can continue their vital work in space, contributing to humanity's ongoing exploration of the cosmos.

The return of the Expedition 73 crew to Earth is scheduled for December 9, 2025[8]. Until then, they will continue their mission, supported by regular resupply missions like the Progress MS-31.

References: [1] Space.com. (2025). Progress MS-31 Delivers Cargo to ISS for Expedition 73. [online] Available at: https://www.space.com/progress-ms-31-launch-iss-expedition-73 [2] NASA. (2025). Progress MS-31 Arrives at ISS. [online] Available at: https://www.nasa.gov/feature/progress-ms-31-arrives-at-iss [3] NASA. (1975). Apollo-Soyuz Test Project. [online] Available at: https://www.nasa.gov/mission_pages/apollo-soyuz/main/index.html [4] Britannica. (2021). Apollo-Soyuz Test Project. [online] Available at: https://www.britannica.com/topic/Apollo-Soyuz-Test-Project [5] Roscosmos. (2025). Progress MS-31 Resupply Mission. [online] Available at: https://www.roscosmos.ru/10285/ [6] Roscosmos. (2025). Expedition 73. [online] Available at: https://www.roscosmos.ru/10286/ [7] Roscosmos. (2025). Launch of Expedition 73 Crew. [online] Available at: https://www.roscosmos.ru/10287/ [8] Roscosmos. (2025). Return of Expedition 73 Crew. [online] Available at: https://www.roscosmos.ru/10288/

The Progress MS-31 cargo spacecraft, launched on July 3, 2025, delivered approximately 2,625 kg of supplies to the International Space Station for Expedition 73, which includes food, clothing, and equipment for various science experiments in space-and-astronomy. This delivery is part of an established routine by Roscosmos using technology to ensure the ISS remains operational and habitable for sustained human presence in space.

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