Caption: Percival Lowell (1855--1916), a member of the famous Massachusetts Lowell family, was one of the last great astronomer magnates---others of his ilk are Alonso the Wise (1221--1284), Ulugh Beg (1394--1449), Tycho Brahe (1546--1601), and William Parsons, 3rd Earl of Rosse (1800--1867).

Features:

1. Lowell was an enthusiastic promoter of the Martian canal theory and did many observations from his own Lowell Observatory, founded 1894 in Flagstaff, Arizona---that is to say the thing a mile away just up the hill from Northern Arizona University (NAU) where yours truly worked 2010--2011.

2. Lowell was also an eager searcher for Planet X, hypothetical planet beyond the orbit of Neptune (FMW-237---239).

   The 19th century folks should have called it Planet IX for Planet 9, but they may have called it Planet X for unknown (No-431).

3. Lowell tried to calculate the Planet X's orbit and position from apparent unaccounted-for astronomical perturbations of the orbits of Uranus and Neptune (No-431). His calculations were wrong and for many years we did NOT believe any unaccounted-for perturbations existed (No-431).

4. Howsoever in 2014, new data suggested a new outer planet did exist. This body has been dubbed Planet Nine. If Planet Nine actually exists, yours truly believes it will be discovered by sometime in the 2020s---people are just looking so hard for it.

5. Lowell searched for Planet X from 1906 until his death 1916 without any luck.

6. Lowell Observatory continued the quest, however, with a dedicated search which eventually discovered Pluto---long considered a planet, now degraded to dwarf planet---but a faded glory lingers---it's the only ex-planet.