‘First instinct is to swim’: my trip on a zero-gravity flight with an Esa astronaut

The sensation of weightlessness is extraordinary as I join Rosemary Coogan for a breathtaking glimpse of life in space

It feels as if I'm hallucinating: as I lie on the floor, the ceiling suddenly sinks towards me and the walls begin to tilt at an impossible angle. It is my first experience of zero gravity on an European Space Agency (Esa) parabolic flight. In theory I know what is going on, but my brain just cannot grasp that it is actually me that is floating, that I'm suspended midair.

I am accompanying Britain's first female Esa astronaut, Rosemary Coogan, on the flight as part of her zero gravity training for a potential six-month deployment to the International Space Station. During the three-hour flight, sometimes referred to as the vomit comet, the plane will trace out 31 parabolas - soaring arcs in the sky.