He is a self-taught computer hacker, amateur astronomer and reportedly enjoys writing code.

FORBES: Polymath scion

Mandel is an amateur astronomer--an "obsessive amateur, " in his own words.

FORBES: A Star Is Born

Together with an amateur astronomer friend from California, Mandel has traveled to Australia and set up a high-powered telescope, mount and CCD camera in Lee's own backyard observatory, which they've dubbed the Australian-American Imaging Station.

FORBES: A Star Is Born

"It's no exaggeration to say that Patrick, in his tireless and ebullient communication of the magic of astronomy, inspired every British astronomer, amateur and professional, for half a century, " said Queen guitarist Brian May, who holds a PhD in astrophysics.

BBC: Tributes paid to Sir Patrick Moore

"He will be missed by countless fans not only because he was a popular entertainer and musician but also because he was a highly distinguished astronomer who always prided himself on being 'an amateur' whilst winning the recognition of fellow scientists from across the world, " acting BBC director general Tim Davie said in a tribute.

BBC: Tributes paid to Sir Patrick Moore