The Progress spacecraft is an unmanned cargo vehicle developed by the Soviet Union and currently operated by Russia. It plays a crucial role in supplying space stations, particularly the International Space Station (ISS), where it has been delivering essential supplies since 2000. Progress is vital for resupply missions, helping to ensure that astronauts aboard the ISS have everything they need to conduct their work.

Launched for the first time in 1978, the Progress was part of the Soviet program to support the Salyut space stations. Its design is based on the Soyuz crew spacecraft, but it has been modified significantly to serve its cargo transport function. Unlike the Soyuz, which is equipped for human spaceflight, Progress does not have life-support systems or a heat shield, making it more streamlined for delivering supplies.

The spacecraft features a cargo module that carries a variety of supplies, including food, water, oxygen, fuel, and scientific equipment. Progress is designed for autonomous docking with the ISS, although astronauts can manually control it if necessary. Over the years, several versions have been developed, such as Progress-M and Progress-MS, each incorporating improvements to enhance performance and increase cargo capacity.

The Soyuz 2.1a (Cargo) is a variant of the Soyuz rocket specifically designed for cargo missions. It is part of the broader Soyuz family, which has been one of the most reliable and widely used launch vehicles since its introduction.

Specs

Height: 46.3 m (152 ft)

Diameter: 10.3 m (33 ft 10 in)

Mass: 312,000 kg (688,000 lb)

Stages: 3 or 4

The Soyuz 2.1a rocket is an upgraded version of the traditional Soyuz design, incorporating modern technology and improved performance features. This variant is specifically tailored for launching cargo payloads into low Earth orbit, making it ideal for missions to the International Space Station (ISS) and other orbital destinations.

The Soyuz 2.1a rocket consists of three stages, with the first two stages powered by RD-107A engines and the third stage using an RD-0124 engine. This combination allows the rocket to achieve a higher payload capacity compared to its predecessors. The rocket can carry various payloads, including cargo spacecraft like Progress, satellites, and scientific instruments.

Soyuz 2.1a can deliver approximately 7.8 tons to low Earth orbit, making it a versatile choice for various missions. Its reliable launch profile and robust engineering have earned it a strong reputation in the aerospace community. The rocket has been used in multiple missions, supporting both governmental and commercial payloads.

The first launch of Soyuz 2.1a occurred in 2006, and it has since played a significant role in resupplying the ISS, among other missions. Its successful track record is a testament to the enduring legacy of the Soyuz program, which has adapted and evolved over the decades to meet the needs of modern space exploration.

Image courtesy of RSC Energia / Roscosmos

Site 31/6 has been an active launch pad since January 14th, 1961. It has been used to launch R-7A, Vostok, Voskhod, Polyot, Molniya, and previous versions of Soyuz rockets.

It is currently used exclusively to launch the Soyuz 2 rockets.

A workhorse pad for satellite and robotic missions, it took up crew launch duties for Russian missions to the Station beginning in April 2020.

Baikonur Cosmodrome

Located in southern Kazakhstan, Baikonur was the world's first spaceport and the launch site for humanity's first orbital satellite, Sputnik, and Yuri Gagarin's first human spaceflight on April 12th, 1961.

Originally built as the Soviet Union's launch base, the collapse of the Union led to the Kazakh government leasing Baikonur to Russia until 2050.

The spaceport is operated both by Roscosmos, the federal space agency of the Russian Federation, and the Russian Aerospace Forces, a branch of the Russian Armed Forces.

Image courtesy of GK Launch Services / Roscosmos