EXPERT REACTION: Serving up a fireball - the volleyball sized meteor challenging our view of the solar system

Publicly released:
Australia; International; WA
Springer Nature
Springer Nature

Aussie and international researchers have pinpointed the most likely origin of a huge fireball that amazed Canadian stargazers in Alberta last year, and say that it challenges previous theories about the formation of the solar system. They say the meteorite is believed to have originated in the Oort cloud, a theoretical cloud of icy objects which is predicted to orbit the sun in the most distant regions of our solar system. The team say that the fireball was caused by a volleyball-sized rocky meteor weighing around 2kg, and indicates that the ratio of rocky material to icy material in the Oort cloud is higher than previously thought. 

Expert Reaction

These comments have been collated by the Science Media Centre to provide a variety of expert perspectives on this issue. Feel free to use these quotes in your stories. Views expressed are the personal opinions of the experts named. They do not represent the views of the SMC or any other organisation unless specifically stated.

Dr Hadrien Devillepoix is Research Associate in the School of Earth and Planetary Sciences (EPS) at Curtin’s Space Science and Technology Centre and an author on the paper

It was completely unexpected for a rocky fireball to have travelled such vast distances from the most distant region of our Solar System, called the Oort Cloud. High-tech fireball cameras developed by Curtin researchers and run by the University of Alberta captured vision of this volleyball-sized rocky meteor, weighing about 2kg. Since then, we have been able to conclude that all signs point to this dazzling fireball originating from a region much further away than we ever would have anticipated – the Oort Cloud. The Oort Cloud is a collection of icy objects sailing through space that – until now – had not offered any direct objects for scientists to observe. This new discovery showed a significant amount of rocky material was co-existing with the icy objects already known to call the Oort Cloud home. The presence of this rocky meteor from that location can not be explained by our current understanding of the formation of the Solar System.

Last updated:  09 Dec 2022 10:48am
Contact information
Contact details are only visible to registered journalists.
Declared conflicts of interest None declared.

Attachments

Note: Not all attachments are visible to the general public. Research URLs will go live after the embargo ends.

Research Springer Nature, Web page
Journal/
conference:
Nature Astronomy
Research:Paper
Organisation/s: Curtin University
Funder: Funding for this work was provided in part through NASA co-operative agreement 80NSSC21M0073 (D.V., P.G.B.), bythe Natural Sciences and Engineering Research Council of Canada Discovery Grants programme (grant numbers RGPIN-2016-04433 and RGPIN-2018-05659; D.V., P.G.B.), the Canada Research Chairs programme (P.G.B.), the Slovak Research and Development Agency grant APVV-16-0148 and the Slovak Grant Agency for Science grant VEGA 1/0218/22 (P.M., J.T.).
Media Contact/s
Contact details are only visible to registered journalists.