How can we conclude that Sven was working in zero gravity?
We can conclude that Sven was working in zero gravity from several details in the extract.
The girders 'floated around in free fall,' and he made them perform a 'slow-motion, three-dimensional ballet.' The crew could 'step back and admire their handiwork without being abruptly parted from it by gravity.'
These descriptions clearly indicate the absence of gravitational pull that exists in space.
Explanation
The extract contains multiple references to zero gravity conditions: objects floating in 'free fall,' the 'three-dimensional ballet' of girders that would be impossible on Earth, and the explicit mention that workers could admire their work 'without being abruptly parted from it by gravity.' These details confirm the space setting where gravity is absent or minimal.
Solution Steps
The girders 'floated around in free fall' indicating zero gravity conditions
Objects performed a 'slow-motion, three-dimensional ballet' which is only possible without gravity
The crew could admire their work 'without being abruptly parted from it by gravity' confirming absence of gravitational pull
These details together confirm the space setting where gravity is absent or minimal