Back
Science

Northrop Grumman Cygnus XL Spacecraft Concludes Mission, New Resupply Flight Scheduled

Generated on: Last updated: 10 sources
View source

Cygnus Cargo Missions: One Concludes, Another Prepares for Launch

A Northrop Grumman Cygnus XL cargo spacecraft has departed the International Space Station (ISS) following a months-long resupply mission. Separately, NASA, Northrop Grumman, and SpaceX are preparing to launch the next Cygnus XL mission to deliver new scientific investigations and supplies to the orbital laboratory.

🚀 Concluded Mission: NG-23 / S.S. William "Willie" McCool

The first flight of the larger Cygnus XL spacecraft, designated mission NG-23 and named the S.S. William "Willie" McCool, has been completed.

The spacecraft delivered approximately 11,000 pounds (4,990 kilograms) of supplies and scientific equipment to the ISS.

  • Launch and Arrival: Launched on September 14, 2025, aboard a SpaceX Falcon 9 rocket from Cape Canaveral Space Force Station in Florida. It arrived at the ISS on September 18.
  • Departure: Unberthed from the Unity module on March 12, 2026, and was released by the station's Canadarm2 robotic arm at 7:06 a.m. EST.
  • Disposal: Loaded with station trash, the spacecraft performed a controlled deorbit maneuver, burning up harmlessly in Earth's atmosphere on March 14.

🛰️ Upcoming Mission: CRS-24 / S.S. Steven R. Nagel

The next resupply mission, designated NASA’s Northrop Grumman Commercial Resupply Services 24 (CRS-24), will be the second flight of the Cygnus XL variant.

  • Launch Details: Targeted for no earlier than 8:49 a.m. EDT on Wednesday, April 8, 2026. A SpaceX Falcon 9 rocket will launch from Cape Canaveral Space Force Station.
  • Spacecraft Name: The spacecraft is named the S.S. Steven R. Nagel, in honor of the former NASA astronaut.
  • ISS Rendezvous: Astronauts plan to capture the spacecraft with the Canadarm2 on Friday, April 10, for installation on the Unity module.
  • Mission Duration: The spacecraft is scheduled to remain docked at the station until October 2026.

🔬 Primary Scientific Cargo for CRS-24

The Cygnus XL for CRS-24 is carrying approximately 11,000 pounds of cargo. Key research and technology demonstrations include:

A new Cold Atom Lab module and stem cell production hardware headline the mission's scientific payload.

  • Cold Atom Lab Module: Designed to advance quantum science research on the ISS.
  • Stem Cell Production Hardware: Aims to increase production of therapeutic stem cells in microgravity for research into blood diseases and cancer.
  • Microbiome Studies: Model organisms, including roundworms, for studying the gut microbiome in space.
  • Space Weather Receiver: Will collect data to enhance models of space weather, which can affect GPS and radar systems.

🧰 Additional Hardware and Supplies

The mission will also deliver various hardware and supplies to the station, including:

  • A compact exercise device (European Enhanced Exploration Exercise Device).
  • A supplemental heat rejection system for the station's thermal control.
  • A medical imaging device (Ocular Coherence Tomography) for monitoring crew eye health.
  • Essential consumables such as water tanks, gas tanks, batteries, and spare parts.

📜 Context and Background

The Cygnus is one of several robotic cargo spacecraft that service the ISS, alongside SpaceX's Dragon, Russia's Progress, and the Japan Aerospace Exploration Agency's HTV-X. The Cygnus XL is a larger, more cargo-capable version of Northrop Grumman's solar-powered spacecraft.

Resupply missions deliver the investigations and equipment necessary to support continuous human occupation and scientific research on the ISS, which has been ongoing for over 25 years.