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 December 1, 2017, the ISS was in the midst of Expedition 53, a mission that involved a series of scientific experiments, crew rotations, and cargo resupply operations. This article provides an overview of the ISS's status on that date, highlighting key activities and developments.

Expedition 53 Overview

Expedition 53 was a significant mission in the ISS's operational timeline, focusing on various scientific investigations and maintenance tasks. The crew aboard the station during this period included NASA astronauts Mark Vande Hei and Joe Acaba, along with Russian cosmonauts Sergey Ryazanskiy and Andrei Babkin. Their collective efforts aimed to advance our understanding of human health, technology, and the fundamental laws of physics in space.

Scientific Experiments and Research

On December 1, 2017, the crew engaged in several notable scientific activities:

  • Circadian Rhythms Study: A 52S crewmember removed and stowed the Double Sensors and Thermolab Unit equipment used to complete a 36-hour Circadian Rhythms session that began on Wednesday. This study investigates how long-duration spaceflight affects the human biological clock, particularly focusing on the synchronization of circadian rhythms in microgravity. The research aims to understand the impact of space travel on sleep patterns and overall health. ([](

Cargo Resupply Missions

December 2017 saw significant cargo resupply operations to support the ISS's ongoing research and crew needs:

  • SpaceX CRS-13 Mission: Launched on December 15, 2017, this mission delivered approximately 4,800 pounds of cargo to the ISS. The Dragon spacecraft carried science experiments, crew supplies, and hardware essential for the station's operations. Notably, it included the Total and Spectral Irradiance Sensor (TSIS-1) to measure the Sun's energy input to Earth and the Space Debris Sensor (SDS) to monitor the orbital debris environment around the station. ([blogs.nasa.gov](

Crew Rotation and Spacecraft Operations

December 2017 also involved crew rotations and spacecraft operations:

  • 51S Soyuz Undocking and Landing: On December 15, 2017, the 51S crew, consisting of Randolph Bresnik, Sergey Ryazanskiy, and Paolo Nespoli, undocked from the ISS at 11:13 PM CST and landed at 2:37 AM CST on December 16. This marked the conclusion of their mission, and the ISS transitioned to a three-person crew until the arrival of Soyuz 53S on December 19. ([nasa.gov](

Environmental Monitoring

During this period, the crew also contributed to Earth observation efforts:

  • California Wildfires Observation: Expedition 53 Commander Randy Bresnik captured photographs of the wildfires in California on December 6, 2017. These images provided valuable data for environmental monitoring and disaster response efforts on Earth. ([](

Conclusion

On December 1, 2017, the International Space Station was actively engaged in a range of scientific experiments, crew rotations, and cargo resupply missions. These activities underscored the ISS's role as a hub for international collaboration and scientific advancement in space. The ongoing research and operations during this period contributed significantly to our understanding of human health in space, technological development, and environmental monitoring on Earth.

Sources

  • NASA – ISS Daily Summary Report – 12/01/2017 –
  • NASA – SpaceX Dragon Spacecraft Heads for Space Station After Successful Launch –
  • NASA – ISS Daily Summary Report – 12/15/2017 –
  • NASA – NASA Space Station On-Orbit Status 7 December 2017 – California Wildfires –