London's planetarium is closing to make way for more celebrity waxworks.
The new show will open in the summer
The green-domed building in Marylebone Road, central London, opened more than 50 years ago but managers say it is failing to attract enough customers.
Diane Moon of the London Planetarium said the new London Auditorium would be transformed into a show which would "get into the heart of celebrity".
But well-known astronomer Sir Patrick Moore said the decision was "most regrettable".
"London must now be the only major city in the world without a planetarium.
"I have already had inquiries from people asking if they can't go to the London Planetarium, where can they go," Mr Moore said.
The London Auditorium is due to open in the summer.