According to Time.com, this was posted March 24, 1930.
The inhabitants of Earth learned last week that there is another planet, beside the eight they knew about, revolving around the Sun as the earth does.
Clyde W. Tombaugh, 24, an assistant at the observatory, saw a strange blotch of light on a new plate. He hastily took the photograph to Vesto Melvin Slipher, director of the observatory. Dr. Slipher joyfully notified his younger brother, Earl Carl Slipher, and the rest of the staff, including Carl Otto Lampland. They were quite excited.
Astronomy may not be static but history is. Those scientists can be found today just as the census enumerator recorded them 10 days after the article appeared in Time.