This Freesphere, in orbit around Hiederia, holds a number of freeform microgravity structures which serve as habitats and workshops for the low-gravity tweaks who live there
Free fall habitat often used as a recreational area in an orbital band or as habitation for the space adapted.
Freespheres are large, transparent, double-walled open bubbles, ranging from several hundred meters to several thousand kilometers across, filled with air. Appropriately modified lifeforms create a free-fall ecology and a layer of water between the inner and outer walls, combined with magnetic screening, provides an effective radiation shield. Freespheres are especially popular when placed in planetary orbit due to both the spectacular views and the sense of truly flying 'above' something rather than merely floating in space.
For freesphere diameters greater than 100km, stronger materials and additional re-enforcing structures are required. This reenforcement attenuates the views, as does the longer sight lines through the internal atmosphere, but with a hull completely made of buckycables a Freesphere can be made much larger than a rotating habitat made of the same material; as large as 5,000 km across even with full, baseline comfortable, atmospheric pressure.
Freespheres may employ complex internal environmental systems, including airwalls, fusion or conversion reactor "suns", and various feedback-based systems to promote airflow, control temperature, and manage both general humidity and larger concentrations of moisture (ranging from small "pools" to "seas" several kilometers across).
Microgravity - Text by M. Alan Kazlev A state in which gravity is reduced to virtually negligible levels. For example, when an object is in free fall, it experiences microgravity. It is deleterious to baseline physiology, but space-adapted tweaks can survive a microgravity environment indefinitely.
Microgravity Art - Text by Anders Sandberg Art that requires micro- or zero- gravity to retain its configuration. Fragile sculptures are popular, some including liquids in interesting configurations. The only problem to deal with is air drafts.
Space People - Text by M. Alan Kazlev  (archaic) A common early term for Space Adapted Humans, still used by some descendants of the original clade.  (Second Federation era) A term for vacuum adapted tweaks. (rarely used)