<p>From 1905 until his death in 1916, Percival Lowell searched for a ninth planet, which he called Planet X. Lowell had predicted the planet based on irregularities in the orbit of Uranus. In 1929, Lowell Observatory Director V.M. Slipher hired self-taught astronomer Clyde Tombaugh to resume Lowell’s search for the planet. Tombaugh captured long-exposure photos<a class="more-link" href="https://www.astronomy.com/today-in-the-history-of-astronomy/feb-18-1930-discovery-of-pluto/">Continue reading <span class="screen-reader-text">"Feb 18, 1930: Discovery of Pluto"</span></a></p>
<p>The post <a href="https://www.astronomy.com/today-in-the-history-of-astronomy/feb-18-1930-discovery-of-pluto/">Feb 18, 1930: Discovery of Pluto</a> appeared first on <a href="https://www.astronomy.com">Astronomy Magazine</a>.</p>
From 1905 until his death in 1916, Percival Lowell searched for a ninth planet, which he called Planet X. Lowell had predicted the planet based on irregularities in the orbit of Uranus. In 1929, Lowell Observatory Director V.M. Slipher hired self-taught astronomer Clyde Tombaugh to resume Lowell’s search for the planet. Tombaugh captured long-exposure photosContinue reading “Feb 18, 1930: Discovery of Pluto”
The post Feb 18, 1930: Discovery of Pluto appeared first on Astronomy Magazine.