Artemis II: The historic mission to explore the far side of the Moon lifts off today

We're just hours away from a moment so many of us have been waiting years for. If everything sticks to the schedule, the Space Launch System (SLS) will roar with a force not seen since the Apollo era. I'm talking, of course, about the launch of Artemis II, the mission that will not only send four astronauts into lunar orbit but will dare to explore what no human has ever seen with their own eyes: the far side of the Moon. Following the resounding success of the uncrewed Artemis 1 mission, which validated every critical system a few months back, the bar is incredibly high. But if there's one thing the space agency has proven in recent years, it's that they know how to write these chapters of history.

A journey like no other: from launch to the lunar shadow

The trajectory for Artemis 2 is no simple jaunt around our satellite. It's a free-return orbit that will take the crew beyond the point of no return, venturing into territory where direct communication with Earth is a major technical challenge. The path is calculated to the millimetre so that at its peak, the spacecraft will slip behind the Moon, plunging the astronauts into a radio silence lasting over 30 minutes. For many, that's the most critical moment, but for those of us familiar with spaceflight, it's the true trial by fire for the new generation.

The heart of this adventure beats within the Orion Service Module. This isn't just a container; it's the brain and driving force of the mission, built through a European collaboration that shows space exploration is no longer the domain of a single nation. It provides power, propulsion, thermal control, and most importantly, the water and air that will keep the crew alive during the ten-day odyssey. The difference from Artemis 1 is monumental: now there are human lives on board, and every system has been tested to ensure that if something goes wrong, rescue is possible, even across these colossal distances.

• The Launch: From the Kennedy Space Center, the SLS will generate 8.8 million pounds of thrust. It's the most powerful rocket ever built. When it lifts off, we won't just see fire; we'll see the culmination of decades of engineering.
• Trans-Lunar Injection: After reaching Earth orbit, the SLS's upper stage will give the final push to send Orion towards the Moon. It's the moment the crew will know there's no turning back.
• The Encounter with THEMIS: During the flight, the THEMIS science programme will be activated, studying how the solar wind interacts with the lunar surface. It's a last-minute addition, but one astrophysicists have been requesting for years. They'll use the human presence to calibrate instruments with a precision satellites can't match.
• The Far Side: They'll pass just 100 kilometres above the surface of the far side. The images we'll see from Orion's cameras will be of terrain completely untouched by the human eye.

A technical and human challenge worthy of the chosen few

The countdown is relentless. By now, technicians have finished loading the liquid hydrogen and liquid oxygen tanks. The launch window is narrow, but anyone who's followed the development of the Space Launch System knows that this time, reliability is at its peak. Lessons were learned from the previous mission: the hydrogen purge issues that caused so much trouble during the Artemis 1 tests are now resolved. There's no room for rookie nerves here.

For those of us in Ireland, this mission holds a special significance. The Orion Service Module bears the stamp of the European Space Agency (ESA), and technology developed in European facilities is travelling within its core. This isn't just an American journey; it's a human journey with a distinct European imprint. When the astronauts look back and see Earth as a small blue dot, part of that home will be our contributions. And that, friends, isn't just cheap patriotism; it's a scientific fact.

The anticipation couldn't be higher. The images we'll get from Artemis II are destined to become iconic. We'll see the Moon like never before, with resolution and quality that far surpass anything from previous missions. And the best part? This is just the appetiser. What really keeps us up at night is knowing that if Artemis II succeeds, the Artemis III mission already has its sights set on the lunar south pole, where a sustained human presence will be established. But that's a story for another day. Today, we look to the sky and hope the SLS gives us the spectacle we so desperately need. The countdown has begun.