Meet 5 cargo spacecraft that have resupplied the ISS

Food, spare parts and experiments need a ride to the International Space Station. The delivery vehicles can look like relatives in a quick montage, yet their histories reveal different answers to the same practical questions: how do you attach a cargo ship, what can it bring, and does anything come back?

Here are five selected spacecraft families that have resupplied the ISS: Progress, Dragon, Cygnus, HTV and ATV. This is a historical comparison, not an exhaustive list of visiting vehicles or a claim about today's fleet. Variants matter, particularly for Dragon and Japan's later HTV-X.

1. Progress: supplies arrived before the first resident crew

Russia's Progress family, operated in the Russian space program now led by Roscosmos, brought cargo to earlier space stations before serving the ISS. Progress M1-3 arrived at the ISS on August 8, 2000, while the station was still waiting for its first resident expedition. Its load included propellant and equipment to help prepare the new outpost. Source: NASA's Expedition 1 history.

The memorable detail is the plumbing as well as the parcels: this delivery helped refuel Zvezda. A resupply mission can provide consumables and support station operations, rather than simply move boxes through a hatch. NASA's Progress history also documents several generations of the vehicle, so an early Progress description should not be applied to every later model. Source: NASA's Progress history.

2. Dragon: check which version is in the picture

SpaceX's original Dragon reached the station on May 25, 2012, when astronauts used Canadarm2 to capture it and berth it to Harmony. Later cargo Dragons use a different arrival method: the upgraded vehicle made its first autonomous station docking on December 7, 2020. Source: NASA's 2012 arrival record; NASA's December 2020 mission archive.

That makes Dragon a good trap for a casual “how cargo ships dock” explanation. A video of astronauts grappling a Dragon and a later report describing autonomous docking can both be correct. The version and mission date resolve the apparent contradiction. Dragon also provides a return route for cargo in its recoverable capsule, an important distinction when researchers need samples back on Earth. Source: NASA's cargo-return report.

3. Cygnus: the robotic arm gets a delivery job

Cygnus is now associated with Northrop Grumman; its first station demonstration was flown by Orbital Sciences. On September 29, 2013, astronauts captured the spacecraft with the station's arm and it was attached to Harmony. The delivery included food, clothing and student experiments. Source: NASA's first Cygnus arrival report.

This is berthing: the spacecraft approaches, the arm captures it, and the vehicle is positioned for attachment. It is a helpful contrast with a vehicle completing its own docking contact. Cygnus is also used to remove discarded material from the station, with the departing spacecraft ending its mission through destructive atmospheric reentry. The arrival and departure jobs are different sides of the same supply chain. Source: NASA's Cygnus mission history.

4. HTV Kounotori: room for cargo inside and outside

JAXA's H-II Transfer Vehicle, nicknamed Kounotori, carried both pressurized and unpressurized cargo. That meant supplies for the inhabited station and equipment intended for its exterior could travel on the same vehicle. Its first demonstration mission launched from Tanegashima in September 2009. Source: JAXA's HTV-1 press kit.

The original HTV program completed nine missions from 2009 through HTV9 in 2020. HTV9's recorded milestones include robotic capture and berthing, followed by departure and reentry. JAXA identifies HTV-X as its successor; the two names should not be casually swapped in a historical caption. Source: JAXA's HTV history; HTV9 mission record.

5. ATV: a cargo ship that could also give the station a push

ESA's Automated Transfer Vehicle supplied the station on five missions. The first, Jules Verne, automatically docked with Zvezda on April 3, 2008. Its job included delivering cargo, water and propellant, alongside propulsion support for the station. Source: ESA's first ATV docking report.

The distinctive extra was reboost: using propulsion to raise the station's orbit. Jules Verne later departed and made a controlled destructive reentry in September 2008. The five-mission ATV history belongs in this retrospective without implying the vehicle is part of the current cargo fleet. Source: ESA's Jules Verne mission history.

A comparison worth keeping beside a replay

Arrival methods in the historical examples above

Example	Arrival to remember
Progress M1-3	Automatic docking at Zvezda
Dragon in 2012 / upgraded cargo Dragon in 2020	Robotic capture and berthing / autonomous docking
First Cygnus	Robotic capture and berthing
HTV9	Robotic capture and berthing
ATV Jules Verne	Automated docking at Zvezda

For the orbital background, see LaunchDetect Academy's orbital mechanics primer. For launch-event context, browse the launch archive. An available launch evidence record is one stage of a mission's story; use agency records to verify station arrival and cargo delivery.