William Jackson Humphreys' calculations showed that an observer could see all the way around a planet nearly six times larger in radius than the Earth, with the same atmosphere as the Earth, because of looming.
List of Internet phenomena | Looming | Seismic refraction | Secular phenomena | ''Phyllodesmium briareum'' (one specimen at the bottom of the image) looks very similar to the soft coral | National Investigations Committee on Aerial Phenomena | Cycads from the Fremouw Formation are similar to the living ''Bowenia | A similar ''Passion'' shown in a number of small scenes, ca. 1490, from the ''Entry into Jerusalem'' through the Golden Gate | A similar bread depicted in ''The Beaneater'' by Annibale Carracci | A halo phenomenon observed over the South Pole. Featured in the photo are several distinct phenomena: A '''parhelic circle''' (horizontal line), a 22° halo |