The Sky at Night
Season 3, Episode 4: Twin Stars
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Patrick Moore and Roger Griffin talk about these pairs of suns revolving round each other, and how they help astronomers to measure the masses of the stars.
All Episodes - Season 3
Episode 1
Life and Death of the Sun
Episode 2
Life and Death of the Sun
Episode 3
Mercury and the Moon
Episode 4
Twin Stars
Episode 5
The Shape of our Galaxy
Episode 6
Minor Planets
Episode 7
Life on Venus
Episode 8
Lights in the Sky
Episode 9
The Ringed Planet
Episode 10
Topical Events
Episode 11
The Front and the Back of the Moon
Episode 12
Pairs of Suns
Episode 13
The Star in the East