Sir Patrick Moore hosted an episode of Sky at Night in September where he reflected on the lives on Neil Armstrong and Bernard Lovell.
Moore, British television's longest serving presenter, hosted the monthly documentary since its first airing on 24 April 1957 until his death today.
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The prime minister was shouted at as she left the scene of the tragedy in which at least 79 people died.
Father-of-six Makram Ali, 51, was already receiving medical treatment as the attack unfolded. He died from multiple injuries, police say.
A review of how police and security services dealt with the latest terror attacks in the UK is to be launched, Amber Rudd has announced.