Tested, target never read
Astral projection
Astral projection is the claimed ability of leaving the body and perceiving from outside it. It has been tested — Charles Tart, 1968, and the AWARE studies of Parnia and colleagues, 2014. Tart's subject reported the number correctly on one night, under conditions later criticised as leaky. In AWARE, of 2,060 cases, 140 survivors were interviewed, 9 reported an out-of-body experience — and not one target was reported by anyone.
The experiment
Charles Tart, 1968, and the AWARE studies of Parnia and colleagues, 2014
The out-of-body experience itself is entirely real as an experience and can be induced reliably by stimulating the temporoparietal junction. What has not happened is anyone reading the card on the shelf.
Where the word comes from
The term comes from Theosophy in the 1880s; the experience itself is far older and universal.
Terms in this field are younger than they sound. Most were coined between 1840 and 1930, in the Spiritualist and Theosophical revivals, and then presented as ancient. Dating them is the cheapest reality check available.