“A Previously Undescribed Specific Phobia”, Alan Price, David Moore, Raja Mukherjee, Kayleigh Sheen2023 (anxiety)⁠:

We wish to draw the readers’ attention to a specific phobia that is previously undescribed in the literature. Since it has not yet been described, the following is anecdotal and is based on personal experience and a grey literature from an online community of sufferers [eg. Reddit, subreddit]. It is the fear of falling up into the sky.

The name Casadastraphobia has been adopted by the community of sufferers; the etymology of which comes from the Latin cas (to fall) ad astra (to the stars).

There seems to be some similarity to Agoraphobia, with experience of anxiety in open spaces, however this anxiety is specifically related to the feeling that the individual might fall up into the sky.

…The severity of Casadastraphobia seems to be subject to considerable individual differences; many seem to live relatively normal lives but will tend to avoid wide open spaces, while others experience severe anxiety and find it difficult to leave their homes for work or social events, leading to a substantial impact on quality of life.