Key takeaways
- For the first time in history, live 4K video was transmitted from the Moon to Earth by laser—and streamed to 25 million viewers.
- The network that carried the laser signal across two hemispheres was built in a matter of weeks—for the cost of a laptop.
- Everything proven on Artemis II becomes the foundation for Artemis IV—when NASA aims to land humans on the Moon for the first time since 1972.
In April 2026, four astronauts aboard NASA's Orion spacecraft launched on the Artemis II mission—the first crewed voyage to the Moon since Apollo 17 in 1972. An estimated 25 million people watched the launch live on NASA+, YouTube, and Prime Video, and days later, millions more tuned in to see something no one had ever witnessed: 4K video of astronauts rounding the Moon, transmitted to Earth by laser.
You may have watched the launch, but what you didn't see was everything behind it: the years of engineering work, the cloud-based computing that charted the flight path, and a network connection built in weeks between NASA and Australia to deliver 4K video to 25 million viewers.
Computing a path to the Moon
Trajectory design for a crewed lunar mission isn’t a single calculation. The Orion flight sciences team at NASA's Johnson Space Center runs tens of thousands of simulations across nominal and off-nominal (mission control speak for normal and abnormal) scenarios, generating two to five terabytes of data for each potential launch window.
The computing platform behind those simulations runs in AWS GovCloud (US)—a secure, government-certified cloud environment required for handling Artemis flight data. In the first 48 hours after launch, the system calculated flight path adjustments in near real-time, processing thousands of compute hours to retarget and optimize the trajectory as conditions changed.
Booz Allen Hamilton built the system using a technique called cloud bursting: when NASA's analysts needed more computing power, they could scale into hundreds of additional Intel-based cloud instances on demand. No waiting in line. On-premises systems are a shared resource—many missions compete for time on them. For Artemis II, the cloud meant the team could run simulations whenever they needed to, not whenever a slot opened up.
Laser light for a global network: Connecting the Moon to Earth
Artemis II carried a piece of technology NASA had been developing for more than two decades: the Orion Artemis II Optical Communications System, or O2O. O2O is a laser-based terminal capable of transmitting data from the Orion spacecraft at up to 260 megabits per second, fast enough for real-time 4K video.
One of O2O's partner ground terminals sits at the Australian National University's Mount Stromlo Observatory near Canberra: a critical receiving station for laser downlinks during the portions of Orion's trajectory visible from the Southern Hemisphere. To complete the link between Mount Stromlo and NASA's White Sands Complex in New Mexico, where mission operations would process and distribute the video, NASA needed a high-performance network path that could be stood up quickly and operate reliably at scale.
NASA chose AWS for the terrestrial leg of the connection. The team linked Mount Stromlo to a network node in Australia and routed the signal across a global backbone to White Sands, New Mexico—covering roughly 15,000 kilometers in milliseconds. AWS, NASA, and ANU partnered and stood up the connection in a matter of weeks, for the cost of a laptop. From there, it went around the world.
Bringing 250 million people closer to the Moon
NASA+, NASA's official streaming platform, served as a hub for all Artemis II coverage. The platform runs on AWS Elemental services, with MediaLive handling live video encoding and MediaConnect providing reliable transport to distribution partners including YouTube, and Prime Video, which was onboarded as a channel partner during the 2025 migration.
The Artemis II stream was the proving ground for NASA. For the upcoming Artemis IV lunar landing—the first time humans will set foot on the Moon since 1972—the agency is planning for an estimated 250 million viewers.
For Artemis II, NASA+ produced live broadcasts of launch, lunar flyby, and splashdown—with a continuous feed running between them. The production spanned four NASA centers, interconnected through a cloud-based workflow. Prime Video carried the feed under NASA's mandate to reach the widest possible audience—every feed distributed free of charge.
The 4K footage traveled by laser from Orion as it passed the Moon all the way to Australia, crossed the AWS backbone to NASA, was encoded through AWS Elemental, and reached viewers on their phones and televisions—an end-to-end chain spanning over a quarter million miles, connecting viewers to the farthest humans ever to travel from Earth.
A moonshot, built on invisible infrastructure
Four humans circled the Moon for the first time in over fifty years and for a few hours, the world remembered what we're capable of when we work together. That moment belonged to NASA, to the crew, and to everyone who looked up. What made it possible was mostly invisible: years of engineering, a laser link across a quarter million miles, and a network stitched together in weeks—all just for the cost of a laptop.
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