Dr Marek Kukula downloaded clips featuring boys as young as 10 being raped and boys who were forced to rape each other.

Police raided his £780,000 flat in London Bridge, seizing 18 devices and finding movie clips and still images on an old laptop and two USB sticks.

The 49-year-old is the observatory's official spokesman on astronomy and space science, having held senior research positions at UK universities and at NASA's Space Telescope Science Institute.

At the Royal Observatory Greenwich he oversees science content and exhibitions and public programmes and is a spokesperson for the landmark institution.

He is also the author of 'The Intimate Universe' and while a project manager and researcher in residence at the University of Edinburgh he managed a national scheme to train young researchers and match them with secondary schools.

In court, Kukula blamed pressure on completing the writing of the book 'The Scientific Secrets of Doctor Who'.

He pleaded guilty to making 34 Category A indecent images of a child; 107 Category B and 266 Category C indecent images on or before October 5, last year.

'You are a man of exceptional intelligence and academic and professional success,' Inner London Crown Court Judge Freya Newbery told him.'

'You have excelled in your own field and you must be more disappointed than anybody to find yourself in this situation, but you have taken steps to put this all behind you to tackle your demons.'

Prosecutor Rebecca Folks said officers armed with a search warrant told Kukula they suspected indecent images had been downloaded at the address.

'He said: "I'm gay and I have been chatting to people online."'

They found Kukula, who has a degree in Physics with Astrophysics, had downloaded and deleted the images between 2006 and 2009.

Kukula admits he clicked on search terms including: 'man boy sex' 'pre-teen boy' and young boy sex.'

'He has been open and honest he used the internet as a stress-reliever from work at the time. He was changing career, he was under financial pressure and was writing two books,' said Mr. Michael McAlinden, defending.

'To escape he started to binge on the net. He became addicted to surfing the internet and became addicted to pornography and unfortunately that addiction was the type of pornography you see.

'He is homosexual and looks at gay pornography. As he found to his cost searches revealed images that were not appropriate.

'He was not purposefully searching for Category A images and when he saw images of this type they were deleted.'

Kukula was sentenced to twenty-one weeks imprisonment, suspended for twelve months [= He won't go to jail, if he doesn't commit another crime in this period], must complete a sixty-day rehabilitation activity requirement and pay £535 costs.

He must obey a seven-year Sexual Harm Prevention Order, which limits his internet use and sign the sex offenders register for the same period.

'You used porn to deal with stress in the past during a difficult time for you,' the judge told him. 'You were looking at a lot of adult pornography, you got bored and got drawn into the underage pornography sites.'

http://www.dailymail.co.uk/news/article-6002381/Greenwich-Observatorys-Public-Astronomer-downloaded-407-child-porn-images.html

So will he keep his job? I bet he will...