Quiz · Hunting for Life on Exoplanets

Question 1What is the main topic of this listening passage?

How planets form around distant suns How scientists search for life on planets beyond our solar system Why no signals from space have ever been recorded The history of radio telescopes around the world

Question 2How do scientists hunt for planets orbiting distant stars?

By measuring how fast distant stars are moving By counting the moons that circle giant planets By following signals sent from alien civilisations By watching stars dim slightly when a planet passes in front

Question 3What might traces of oxygen or methane on a planet suggest?

Some form of life may be at work there The planet is too hot for water The star is about to explode The planet has no atmosphere at all