Former CNES chief Yves Sillard publishes a book on UAP
- When
- Where
- Paris, France
- Sources
- 1 public source
Yves Sillard, a former director-general of France's space agency CNES, published a 2007 book on unidentified aerospace phenomena. He told a regional daily the extraterrestrial idea should be weighed seriously and objectively but remained only a hypothesis.