Tributes are being paid to the astronomer Sir Patrick Moore, who has died aged 89.
Sir Paul Nurse told the Today programme: "Patrick Moore was one of the great science communicators of our time. A total enthusiast, he seemed to know the universe personally."
Astronomer Heather Couper said: "I wrote to Patrick Moore when I was 16, and I wondered what I was going to do with my life. I thought I'd like to be an astronomer."
"I wrote a P.S. at the bottom of my letter: 'P.S. I'm a girl.' He replied saying: 'Let me reassure you that being a girl is not a problem at all'.
"He inspired us all so much," she added.
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