"I extend my gratitude to Nair for conducting a global scientific event ...," he said at the 39th Scientific Assembly of the Committee on Space Research (Cospar 2012) being held here, 150 km from Bangalore.
Nair had charged Radhakrishnan with "witch-hunting" and "vendetta" and of misleading the government on the controversial Antrix-Devas deal.
COSPAR President Giovanni F Bignami said the Higgs Boson discovery a couple of weeks ago by scientists of CERN (European Organization for Nuclear Research), has come as a major excitement to space scientists.
Bignami said it has excited him as the astrophysical consequence of this discovery can come from space research.