The US space agency put the earlier ban down to a misinterpretation of its policy on foreign nationals.
Chinese officials had called the rejection of Chinese scientists' applications a form of discrimination.
The ban on Chinese scientists was prompted by new counter-espionage legislation restricting foreign nationals' access to NASA facilities, Nasa spokesman Allard Beutel told the BBC.
The event for scientists who research planets beyond the solar system will be held at Ames Research Center.
The conference will be attended by US and international researchers who work on Nasa's Kepler space telescope programme, the report added.
--ANI (Posted on 22-10-2013)