Melvyn Bragg: Comets BBC: "Melvyn Bragg and his guests discuss comets, the 'dirty snowballs' of the Solar System. Halley's Comet is today the best known example of a comet, a body of ice and dust which orbits the Sun. Since they contain materials from the time when the Solar System was formed, comets are regarded by scientists as frozen time capsules, with the potential to reveal important information about the early history of planets." Read on

Ray Jayawardhana: Searching for Alien Planets (Video) TVO: "Could there be alien "Earths" that harbour, or sustain life? University of Toronto astrophysicist Ray Jayawardhana spends his time searching for such planets."

Nando Patat - Astronomy and emotions (Video) "Among the various scientific disciplines, Astronomy is perhaps the one that mostly attracts the interest of the public, capturing its attention through very different aspects. On the one hand, it represents the most extreme geography, exploring the still uncertain frontiers of our universe. On the other, it incarnates desires and intellectual needs which are part of us and of the way we perceive the universe. ESO astronomer Nando Patat will go through these themes, talking about his experience as a scientist, but also as a dreamer." Read on