BBC Science Focus 2019. The hunt for Planet 9: How we'll find the most mysterious object in the Solar System

Immediate Media Co Bristol Ltd. — 100 p. — ISSN: 0966-4270.BBC Focus Magazine is the magazine of popular science and technology that explains the wonders of the Universe through stunning photography and accessible articles. Contributors include the very best writers and science experts, with columns every issue from renowned science writer Robert Matthews, TV presenter and scientist Helen Czerski, and science fiction author Stephen Baxter.