Science Podcasts

Naked Astronomy episode

Fri, 25th Oct 2013

Comet ISON is coming!

Path of Comet ISON across the sky (c) Simon Bishop and Kate Lamble

As Comet ISON draws near to its close approach with the Sun in November, much uncertainty remains over how brilliant it will be. Dominic Ford speaks to Matthew Knight at the Lowell Observatory to find out more. He also talks to Apostolos Christou from the Armagh Observatory about a group of asteroids which closely follow the orbit and Mars, and appear to fragments of a much larger pair of asteroids which collided. Tamela Maciel from the Cavendish Laboratory in Cambridge reports on the lonely exoplanet which doesn't seem to have a parent star, and Kirsten Gottschalk from the International Centre for Radio Astronomy Research reports that the non-detection of gravitational waves by radio astronomers is starting to rule out some theories of how black holes grow.

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In this edition of Naked Astronomy

Full Transcript

  • 15:01 - Asteroids following Mars's orbit

    A group of asteroids following Mars's orbit may be fragments from the collision of much larger asteroids.

  • 22:47 - How do black holes grow?

    When black holes merge, they emit gravitational waves. But no such waves have yet been detected, ruling out some ideas about how they merge.

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