In the quiet hills of North West province, surrounded by scrubland and the occasional grazing cow, a 34-metre-wide dish slowly tilts its face toward the sky. It does not look like much from a distance—a white dot against a blue canvas. But when the Artemis II mission launched from Kennedy Space Center on 1 April 2026, that dish became one of humanity’s most important phone lines to the stars.
The South African National Space Agency (SANSA) is playing a critical role in NASA’s historic Artemis II mission—the first crewed lunar flyby in over half a century. Over ten days, four astronauts will travel farther from Earth than any human since the Apollo era. And when they speak to mission control, when they beam back high-definition video of the lunar surface, when they need a lifeline in the cold darkness of cislunar space, a ground station just outside Hartebeesthoek will be listening.
“We are not just spectators in this mission,” said Dr. Valanathan Munsami, SANSA’s Chief Executive Officer, speaking from the agency’s control room on launch day. “We are co-pilots. South African engineers, scientists, and technicians are keeping those astronauts alive, connected, and safe. That is not hyperbole. That is fact.”
The Mission: Artemis II
Artemis II is NASA’s first crewed test flight of the Orion spacecraft and the Space Launch System (SLS)—the most powerful rocket ever built. The mission launched on 1 April 2026 from Kennedy Space Center in Florida, carrying four astronauts:
- Commander Reid Wiseman (USA)
- Pilot Victor Glover (USA)
- Mission Specialist Christina Hammock Koch (USA)
- Mission Specialist Jeremy Hansen (Canada)
Unlike Artemis I, which was uncrewed, Artemis II carries humans on a ten-day journey that will take them approximately 370,000 kilometres from Earth—farther than the International Space Station, farther than any humans have travelled since Apollo 17 in 1972. The spacecraft will loop around the Moon, test critical systems, and return to Earth for a splashdown in the Pacific Ocean.
But before any of that could happen, NASA needed a network of ground stations capable of talking to Orion across 1.3 light-seconds of space. And one of the most critical nodes in that network sits in South Africa.
SANSA’s Role: The Voice of Artemis
SANSA’s Hartebeesthoek ground station is part of NASA’s Near Space Network (NSN) and Deep Space Network (DSN)—a global array of dishes that communicate with spacecraft from low Earth orbit to the edge of the solar system.
For Artemis II, SANSA’s 34-metre dish (known as HBK-1) is tasked with:
- Telemetry, Tracking, and Command (TT&C): Receiving real-time data on Orion’s position, velocity, temperature, oxygen levels, and dozens of other critical systems.
- Voice and Video Relay: Transmitting two-way audio between the astronauts and mission control at Johnson Space Center in Houston. During key moments—the lunar flyby, the Earth-rise broadcasts—SANSA will carry the signal.
- Emergency Backup: If other ground stations lose contact (due to weather, technical failure, or orbital geometry), Hartebeesthoek becomes the primary link.
“Imagine driving a car across the Karoo at night with no streetlights and no GPS,” said SANSA ground station engineer Thabo Mokoena, who has worked at Hartebeesthoek for eleven years. “Now imagine that car is moving at 40,000 kilometres per hour and the nearest mechanic is 380,000 kilometres away. That is what we are doing. Every signal we catch is a small miracle of physics and engineering.”
Why South Africa?
South Africa’s location is not accidental. Hartebeesthoek sits at a latitude that offers excellent visibility of spacecraft in high-inclination orbits and cislunar trajectories. When NASA’s dishes in California, Spain, and Australia cannot see Orion because of Earth’s rotation, Hartebeesthoek often can.
“We are the bridge,” said Dr. Munsami. “As Earth turns, the signal passes from one ground station to the next. Without Hartebeesthoek, there would be a gap—sometimes hours long—when Orion would be flying blind. NASA does not fly blind. That is why we are here.”
The relationship between SANSA and NASA is not new. Hartebeesthoek has supported over 200 NASA missions since the 1960s, including the Apollo lunar landings, the Space Shuttle programme, and the Mars rovers. But Artemis II is different. It carries humans. The margin for error is zero.
“During Apollo, South Africa was under apartheid. The scientists who worked here were isolated from the rest of the world, even as they helped reach the Moon,” said space historian Dr. Anusuya Chinsamy-Turan of the University of Cape Town. “Now, a democratic South Africa is standing shoulder to shoulder with NASA as an equal partner. That is not just a technical achievement. That is a moral one.”
The Team Behind the Dish
At the Hartebeesthoek control centre on launch day, the atmosphere was quiet, focused, and electric. A dozen engineers sat at consoles, monitoring signal strength, weather conditions, and spacecraft telemetry. Red Bull cans sat next to thermoses of rooibos tea. A small South African flag hung on the wall behind the main display.
“We rehearsed this hundreds of times,” said SANSA communications engineer Lerato Dlamini, 29, one of the youngest engineers on the Artemis II support team. “Simulated failures. Simulated blackouts. Simulated emergencies. At some point, the simulations start to feel real. But then you remember: there are actual human beings up there. Four of them. And they are counting on us.”
Dlamini’s journey to the control room was unlikely. She grew up in Soweto, studied electrical engineering at the University of the Witwatersrand, and joined SANSA as an intern six years ago. Now she is part of the team that will talk to the Moon.
“My grandmother used to tell me that when she was a child, people said the Moon was made of cheese and no human would ever touch it,” Dlamini said, smiling. “Now I am helping four humans fly around it. She would not believe me. But she would be proud.”
The Challenges: Distance, Delay, and Danger
Communicating with a spacecraft 370,000 kilometres away is not like making a phone call. Radio signals travel at the speed of light—about 300,000 kilometres per second. That means a one-way trip from Hartebeesthoek to Orion takes approximately 1.3 seconds. A round trip (send and receive) takes 2.6 seconds.
“That does not sound like much,” said Dr. Munsami. “But when you are in an emergency, two seconds is an eternity. The astronauts cannot have a real-time conversation with Houston. Every exchange has a built-in pause. We have to design for that. We have to simulate for that. We have to train for that.”
Other challenges include:
- Atmospheric interference: Heavy rain or cloud cover over Hartebeesthoek can degrade the signal. SANSA has backup weather models and frequency-hopping protocols to compensate.
- Solar activity: Coronal mass ejections (solar storms) can disrupt radio communications. The SANSA Space Weather Centre in Hermanus monitors the Sun 24/7, providing early warnings to NASA.
- Orbital geometry: As Orion loops around the Moon, the spacecraft will pass behind the lunar body. During those periods, no ground station—including Hartebeesthoek—can communicate. The spacecraft must operate autonomously. Those blackout periods are the most nerve-wracking for the ground team.
“When Orion goes behind the Moon, we lose signal,” said Mokoena. “For about 45 minutes, we are blind. We drink coffee. We stare at the screen. And we wait. The first signal back is always a relief. Like hearing a loved one’s voice after a long silence.”
South Africa’s Growing Role in Space
SANSA’s support for Artemis II is not an isolated event. South Africa has been quietly building a credible space programme over the past decade, with achievements including:
- The launch of three Earth observation satellites (SumbandilaSat, ZACube-1, and ZACube-2).
- The development of the SANSA Space Weather Centre, one of only a handful of such facilities in the Southern Hemisphere.
- A partnership with the European Space Agency (ESA) to host a deep-space ground station at Matjiesfontein in the Karoo.
- The establishment of a national space policy and the construction of a new SANSA headquarters in Pretoria.
“South Africa is not trying to compete with NASA or ESA,” said Dr. Munsami. “We are trying to contribute. Space exploration is not a zero-sum game. When we share data, share resources, share expertise, everyone wins. Artemis II is proof of that.”
The South African government has signalled its commitment to space as a strategic sector. In his 2025 State of the Nation address, President Cyril Ramaphosa announced a R1.2 billion investment in space infrastructure over the next five years, including a second deep-space dish at Hartebeesthoek.
“We cannot build a prosperous South Africa by looking only at the ground,” Ramaphosa said at the time. “We must also look to the sky. The future is up there. And we intend to be part of it.”
Voices from the Ground
On the evening of 1 April 2026, as Artemis II streaked away from Earth aboard the SLS rocket, a small crowd gathered outside SANSA’s Hartebeesthoek facility. They were not politicians or journalists. They were families—the parents, spouses, and children of the engineers inside.
Among them was 67-year-old Martha Mokoena, mother of engineer Thabo Mokoena. She held a small transistor radio to her ear, listening to the live NASA broadcast in English she barely understood.
“I don’t know what he does exactly,” she said, gesturing toward the dish. “He tried to explain it once. Something about signals and the Moon. But I know he works hard. I know he loves it. And I know that when I look up at the Moon tonight, my son is part of something big. That is enough for me.”
Her son, inside the control room, was too busy to look at the Moon. He was watching a screen, tracking a green line that represented the signal from Orion. Steady. Strong. Alive.
“We have lock,” he said quietly into his headset. Then, louder, to no one in particular: “We have lock. Go Artemis. Go South Africa.”
Conclusion: A Giant Leap for a Nation
Artemis II will splash down on 11 April 2026, ten days after launch. The astronauts will be retrieved, debriefed, celebrated. The mission will be declared a success—or not—depending on the data. But whatever the outcome, one thing is already certain: South Africa was there.
Not as a spectator. Not as a footnote. But as a partner. A nation with a 34-metre dish in the North West hills, a team of engineers who refused to look away from the sky, and a quiet determination to reach—not just for the Moon—but for a place among the stars.
“We are a young democracy,” said Dr. Munsami. “We have many problems. Poverty. Inequality. Unemployment. But we also have dreams. And sometimes, dreams are not luxuries. They are necessities. Artemis II is a dream. And we are helping make it real.”
The dish at Hartebeesthoek continues to tilt, tracking Orion as it sails toward the Moon. The green line on the screen remains steady. Somewhere above, four astronauts are looking out a window at the Earth shrinking behind them. And somewhere below, in a control room in the South African scrubland, a young engineer from Soweto is smiling.
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