ESOcast 224: First Interstellar Visitors to the Solar System

In this ESOcast, we explore some of the many questions interstellar visitors 1I/'Oumuamua and 2I/Borisov have raised including: what are they made of? How did they form? Are they like the comets or asteroids in our Solar System? And finally, what can they reveal about other planetary systems?

Credit:

ESO

Directed by: Herbert Zodet.
Editing: Herbert Zodet.
Web and technical support: Gurvan Bazin and Raquel Yumi Shida.
Written by: Caitlyn Boungiorno, Caroline Reid, Herbert Zodet and Bárbara Ferreira.
Narration: Sara Mendes da Costa.
Music: Johan B. Monell ( www.johanmonell.com ) – The Enemy Within 2.0 and STAN DART ( www.stan-dart.com ) – Reflections.
Footage and photos: ESO, M. Kornmesser, L. Calçada, Gennady Borisov, N. Risinger ( skysurvey.org ), NASA, ESA/Hubble, D. Jewitt (UCLA), Space Engine ( spaceengine.org ), C. Malin ( christophmalin.com ), B. Tafreshi ( twanight.org ), Y. Beletsky (LCO), M. Zamani and Daniele Gasparri (www.astroatacama.com ) .
Scientific consultants: Paola Amico, Olivier Hainaut and Mariya Lyubenova.