Interstellar asteroids and comets: planetary dynamics meets galactic dynamics

Event Start:
Event End:
Event Location:
Hennings 318
Intended Audience:
Undergraduate
Speaker:
Paul Wiegert (Western)
Local Contact:

Brett Gladman

Event Information:

In 2017, the first asteroid to enter our Solar System from interstellar space was discovered at the Pan-STARRS telescope in Hawaii, and has now been named 'Oumuamua, a Hawaiian term which signifies 'Messenger from Afar'. In 2019 a second interstellar visitor, comet Borisov (named after its discoverer) appeared. Curiously, they have contrasting properties: 'Oumuamua is rocky and relatively slow (both unexpected beforehand) while Borisov is the reverse: icy and fast. Much could be learned about this new class of object if we knew their sources and/or the mechanism(s) by which they are produced, both of which are uncertain. I'll outline some of the efforts being made to back-track these puzzling visitors to their points of origin, somewhere within our Milky Way galaxy.

Add to Calendar Event Start: Monday, February 24, 2020 - 3:00 pm Event End: 4:00 pm Interstellar asteroids and comets: planetary dynamics meets galactic dynamics Event Information: In 2017, the first asteroid to enter our Solar System from interstellar space was discovered at the Pan-STARRS telescope in Hawaii, and has now been named 'Oumuamua, a Hawaiian term which signifies 'Messenger from Afar'. In 2019 a second interstellar visitor, comet Borisov (named after its discoverer) appeared. Curiously, they have contrasting properties: 'Oumuamua is rocky and relatively slow (both unexpected beforehand) while Borisov is the reverse: icy and fast. Much could be learned about this new class of object if we knew their sources and/or the mechanism(s) by which they are produced, both of which are uncertain. I'll outline some of the efforts being made to back-track these puzzling visitors to their points of origin, somewhere within our Milky Way galaxy. Event Location: Hennings 318

Source URL: https://phas.ubc.ca/interstellar-asteroids-and-comets-planetary-dynamics-meets-galactic-dynamics