The International Space Station (ISS) has been a cornerstone of human space exploration since its inception, serving as a microgravity and space environment research laboratory. On July 5, 2018, the ISS was in the midst of its 56th expedition, known as Expedition 56, which began on June 6, 2018, and concluded on October 4, 2018. This period was marked by significant scientific research, maintenance activities, and international collaboration.

Expedition 56 Crew and Objectives

Expedition 56 was a multinational mission involving astronauts from NASA, the European Space Agency (ESA), and Roscosmos. The crew members included:

  • Serena Auñón-Chancellor (NASA): Flight Engineer
  • Alexander Gerst (ESA): Flight Engineer
  • Oleg Artemyev (Roscosmos): Flight Engineer
  • Sergey Prokopyev (Roscosmos): Flight Engineer
  • Dmitry Petelin (Roscosmos): Flight Engineer
  • Drew Feustel (NASA): Commander

The primary objectives of Expedition 56 encompassed a wide range of scientific experiments, maintenance tasks, and international cooperation. These included:

  • Biological Research: Investigating the effects of long-duration spaceflight on human health, including studies on cancer therapy and fertility.
  • Physical Sciences: Conducting experiments to understand fundamental physics in microgravity, such as fluid dynamics and combustion processes.
  • Earth and Space Observations: Utilizing the ISS's vantage point to monitor Earth's climate, weather patterns, and cosmic phenomena.
  • Technology Demonstrations: Testing new technologies for future missions, including autonomous satellite operations and advanced life support systems.

Scientific Research and Experiments

On July 5, 2018, the crew was engaged in several notable scientific activities:

  • Rodent Research-7 (RR-7): The crew transferred mice from the Transporter Units that arrived on the SpaceX-15 Dragon vehicle to the two Habitat units in which they would reside on the ISS. They checked the water flow in each side of the Habitats and installed the rodent huts and food bars. This research aimed to study the effects of microgravity on mammalian development and physiology. ([nasa.gov](
  • Space Algae Experiment: The crew agitated and installed an additional six Space Algae culture bags in the Veggie facility. This experiment explored the genetic basis for productivity of algae cultivated in space and whether this requires genetic adaptations. Algae may perceive microgravity as an abiotic stress, which can trigger production of certain compounds. ([nasa.gov](
  • Advanced Plant Habitat (APH): The crew operated the APH to monitor plant growth in microgravity. This facility was used to study how plants adapt to space conditions, providing insights into sustainable life support systems for future long-duration missions. ([bgr.com](

Maintenance and Operations

Routine maintenance and operational tasks were integral to ensuring the ISS's continued functionality:

  • Canadarm2 Operations: Astronauts operated the Canadarm2 robotic arm to perform various tasks, including capturing and releasing cargo spacecraft. For instance, on July 15, 2018, the crew released the Cygnus cargo spacecraft, which had completed its mission delivering supplies to the station. ([esa.int](
  • Life Support System Checks: Regular inspections and maintenance of the station's life support systems were conducted to ensure a safe environment for the crew. This included monitoring air quality, water purification, and waste management systems. ([nasa.gov](
  • Spacesuit Maintenance: The crew performed maintenance on Extravehicular Mobility Units (EMUs), ensuring that spacesuits were ready for potential spacewalks. This involved checking suit integrity, communication systems, and life support components. ([nasa.gov](

International Collaboration and Cargo Missions

The ISS's international partnerships were exemplified through various cargo missions and collaborative efforts:

  • SpaceX-15 Dragon Resupply Mission: On July 2, 2018, the SpaceX-15 Dragon spacecraft arrived at the ISS, delivering approximately 5,900 pounds of cargo, including scientific experiments, crew supplies, and hardware. The crew unloaded the cargo and prepared for the spacecraft's departure on July 15. ([nasa.gov](
  • Progress 70 Resupply Mission: The Russian Progress 70 cargo spacecraft delivered nearly 5,700 pounds of crew supplies and station cargo to the ISS on July 9, 2018. This mission underscored the ongoing collaboration between NASA and Roscosmos in maintaining the ISS. ([nasa.gov](
  • Cygnus Cargo Release: On July 15, 2018, astronauts released the Cygnus cargo spacecraft, which had completed its mission delivering supplies to the station. The spacecraft was commanded to release by Expedition 56 Flight Engineers Alexander Gerst and Serena Auñón-Chancellor using the ISS's Canadarm2 robotic arm. ([esa.int](

Notable Events and Celebrations

Amidst the rigorous schedule, the crew also participated in cultural and celebratory activities:

  • Independence Day Celebration: On July 4, 2018, the crew celebrated the U.S. Independence Day by decorating the Advanced Plant Habitat with LED lights in the pattern of the American flag. This festive display highlighted the crew's camaraderie and the ISS's role as a symbol of international cooperation. ([bgr.com](

Conclusion

On July 5, 2018, the International Space Station was a hub of scientific research, maintenance, and international collaboration. The crew's dedication to advancing our understanding of space and human health, coupled with their commitment to maintaining the station's operations, underscored the ISS's pivotal role in space exploration. The activities conducted during this period contributed to the broader goals of the