The Sky at Night

The Sky at Night

Our team of astronomers tell us what's on view in the night sky. From comets to quasars, there is always something fascinating to discuss in the Universe.

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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.

How many alien civilisations could there be?

How many alien civilisations could there be?

Astrobiologist Dr Duncan Forgan uses a famous equation to estimate how many intelligent alien civilisations there could be in our galaxy.

Meet February's guests

Meet February's guests

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

Pete Lawrence's Moon guides

Pete Lawrence's Moon guides

All the information you need to spot the Moon's seas, craters and mountains - with the naked eye, binoculars or a telescope. Also available as PDFs.

Philae lander makes history

Philae lander makes history
On 12 November 2014, after 10 years and 6.4 billion km, Rosetta's Philae lander touched down on comet 67P.

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