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How One Dinosaur-Killing Impact May Have Triggered Global Firestorms

How One Dinosaur-Killing Impact May Have Triggered Global Firestorms

Space Nuts: Astronomy Insights & Cosmic Discoveries vor 1 Monat

Sponsor Link: This episode of Space Nuts is brought to you with the support of https://www.nordvpn.com/spacenuts. Secure your online presence and enjoy a special deal at https://www.nordvpn.com/spacenuts. Asteroid or comet, dinosaur impact...

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Asteroid or comet, dinosaur impact firestorms, crater discovery,
and Q&A on exoplanets and satellites

Andrew Dunkley is joined by Professor Jonti Horner of the
University of Southern Queensland for two tightly related Space
Nuts conversations. The first explores how astronomy keeps blurring
the lines between asteroids and comets, what new research says
about the dinosaur-killing impact, and a surprising crater found by
an amateur astronomer planning a trip. The second is a listener
Q&A covering exotic exoplanet weather, space regulation, and
whether planets can form without a star.

Key topics

In this episode, Andrew and Jonti explain why astronomy often uses
tidy labels for objects that sit on a continuum, especially when
the line between asteroid and comet gets blurry.

They discuss near-Earth object 1998 SH2, which appears to have
comet-like activity despite looking asteroid-like for
decades.

Jonti breaks down how outgassing can nudge a small body off its
predicted path, revealing non-gravitational forces.

The dinosaur-killing impact is revisited with new modelling
suggesting the first hours after impact may have included global
firestorms, not just long-term climate collapse.

The show covers the terminology debate around meteor, meteorite,
fireball, bolide, asteroid, and comet impact.

A Canadian amateur astronomer, Joel LePointe, is credited with
spotting a likely impact crater while planning a camping and hiking
trip using satellite imagery.

The newly identified crater near Lake Marcel in northern Quebec is
described as about 390 million years old and roughly 25 kilometers
wide.

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