Watching an Ariane rocket launch at 10km:
you can't really prepare for it.

They told me: "it's impressive." They told me: "you'll feel the ground shake." Someone even told me people cry. I thought I understood what I was in for. I understood nothing at all.

The night before

Kourou on launch night looks like a city holding its breath. Hotels have been fully booked for weeks. Along the roadsides, families set up coolboxes and folding chairs from 10pm onwards. Some have come from Cayenne, from Saint-Laurent, from neighbouring Suriname. Everyone is looking in the same direction — northwest, toward the Ariane 6 launch pad, where a metal arrow points into the darkness.

I was lucky enough to get a spot in the official CSG observation zone — about 10 kilometres from the launch pad. An elevated platform, tiered seating, a screen replaying the CNES live feed. A dense crowd: children on parents' shoulders, engineers checking their phones every thirty seconds.

The countdown is displayed on the screen. It's 10:43pm.

T-minus 10 minutes

Ten minutes before launch, silence begins to settle spontaneously over the crowd. Nobody gives an instruction. Nobody asks for quiet. It's simply that as the number counts down, people find less and less to say.

On the screen, the technicians in the Jupiter control room run their final checks. The CNES commentator reads out acronyms nobody quite understands, but that everyone listens to with total focus. There is something almost liturgical about this ritual.

T-minus 2 minutes. My neighbour — a man in his sixties wearing a straw hat — raises his binoculars. He tells me he has attended seventeen launches in the thirty years he has lived in French Guiana. "And every time, I feel exactly like the first time," he says. He sounds completely sincere.

T-zero

The light comes before the sound. An orange glow of almost uncomfortable intensity appears at the base of the rocket — as if someone had lit a miniature sun at the foot of the launch pad. Then the rocket starts to move. Slowly at first. Absurdly slowly for something that will reach orbit in minutes.

Then the sound arrives.

It is not a noise. It is a physical presence. A vibration that rises through your legs from the ground, travels through your chest, makes something resonate in your bones. People around me bring their hands to their mouths. Someone says "oh" very quietly. White smoke spreads silently across the savannah as the rocket climbs faster and faster.

"This is French Guiana. We're at the end of the world — and from here, we launch satellites into orbit. Nobody quite realises." — a resident of Kourou, after the launch

The two minutes after

The rocket disappears into the sky in less than two minutes. First it is there — bright and precise. Then it becomes a point. Then it is followed by a trail of motionless vapour suspended in the tropical air — a white scar in the black sky that lingers long after the rocket has gone from sight.

On the screen, the Jupiter control room erupts in applause. In the observation zone, the same thing — spontaneous, genuine, as if everyone had contributed to something. The child in front of me waves both arms and shouts. His father watches him with a smile he makes no effort to hide.

The man with binoculars packs his things slowly, with the movements of someone who has time. "So?" he says. I have no answer worthy of the question. He smiles. "We're all the same."

What it says about French Guiana

What struck me most about this moment was what it says about the territory. French Guiana is 96% virgin forest, rivers, peoples who have not changed their way of life for centuries. And right in the middle of all that, since 1968, Europeans have been launching rockets from the Atlantic coast. It is a coexistence of total improbability — the Amazon national park and Europe's spaceport, a few dozen kilometres apart.

This coexistence is at the heart of French Guiana. You don't really understand it from a map or an article. You have to come. You have to watch a rocket disappear into the sky above a forest where a jaguar may have crossed the road two hours before.