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What Have UFOs Done for Us?

From unexplained flashes in the night sky to flying saucers, this episode delves into the mysterious world of UFOs. How our drive to explain these bizarre phenomena, and desire to discover little green men, has in fact transformed our understanding of the universe.

Release date:

30 minutes

Last on

Fri 27 Feb 2015 01:00

How to see an Iridium flare

Iridium satellites are constantly circling the globe but for you to see a flare they have to be in exactly the right position. Fortunately, the Heavens Above website can tell you when the next one is visible from your area.

The first thing you should do on the site is set the location to your own town or postcode - it needs to be as accurate as possible. The current location will be shown at the top-right of the page, click it and take it from there.

Were we contacted by aliens in 1977?

Were we contacted by aliens in 1977?

In 1977 an astronomer detected a signal that met all the criteria for having been sent by aliens. Prof Brian Cox investigates.

Meet February's guests

Meet February's guests

Prof Dame Jocelyn Bell Burnell, who discovered pulsars, is among this month's guests.


Role Contributor
PresenterChris Lintott
PresenterMaggie Aderin-Pocock
Series ProducerRob Liddell
Executive ProducerJonathan Renouf

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