Given the question: Read the bio below and try to give details on cornelis johannes van houten 's: - other names - fields - death date - workplaces - spouse - work institution - children - birth date - name - nationality - birth place Bio: cornelis johannes van houten -lrb- 1920 -- 24 august 2002 -rrb- was a dutch astronomer , sometimes referred to as kees van houten . born in the hague , he spent his entire career at leiden university except for a brief period -lrb- 1954 -- 1956 -rrb- as research assistant at yerkes observatory . he received his undergraduate degree in 1940 , but world war ii interrupted his studies and he did not get his ph.d. until 1961 -lrb- on the surface photometry of extragalactic nebulae -rrb- . he married fellow astronomer ingrid groeneveld -lrb- who became ingrid van houten-groeneveld -rrb- and together they became interested in asteroids . they had one son , karel . in a jointly-credited trio with tom gehrels and ingrid , and occasionally including fellow astronomer bernhard schmidt , he was an extremely prolific discoverer of many thousands of asteroids . gehrels did a sky survey using the 48-inch schmidt telescope at palomar observatory and shipped the plates to the van houtens at leiden observatory , who analyzed them for new asteroids . the trio are jointly credited with several thousand discoveries . from the statistical properties uncovered it became clear that asteroids fall into certain '' families '' . he also studied the radial velocities of close binary stars . he never retired , but remained active and published articles until his death , on asteroids and eclipsing binaries .
The answer is:
- other names is kees van houten- fields is astronomy- death date is 24 august 2002 1920- workplaces is leiden observatory palomar observatory yerkes observatory- spouse is ingrid van houten-groeneveld- work institution is leiden university- children is karel van houten- birth date is 1920- name is cornelis johannes van houten- nationality is dutch- birth place is the hague , netherlands