Learn · Gresham College

Talk

The Search for Planet X

Professor Ian Morison · Gresham College

Watch At Gresham College

About

The lecture will describe the nearly 200-year-long detective story of the search for planets in the outer reaches of the Solar System. It led first to the discovery of Neptune and Pluto and, recently, to Pluto's downgrading to a 'Dwarf Planet'. We already know of a second dwarf planet beyond Pluto; what others might there be?

The talk

  1. The Search for Planet X 2009-10-22 · YouTube

Credits and licence

Institution
Gresham College
Speaker
Professor Ian Morison
Year
2009
Level
For everyone
Language
English
Subjects
Astronomy and space
Source
Gresham College
Licence
Educational use (Gresham College's terms), as Gresham College states it. Gresham College's terms
Attribution
Gresham College states: "We positively encourage the use of the Gresham College lecture transcripts, audio and video files for educational purposes. However, we do not allow use of Gresham College materials for commercial, personal or institutional gain."
Who can watch
Gresham College gives no rating. Invisible Network shows it to Tweens profiles and older, judged from what the source says about it. How courses are placed