George C. Deutsch, the young presidential appointee at NASA who told public affairs workers to limit reporters' access to a top climate scientist and told a Web designer to add the word "theory" at every mention of the Big Bang, resigned yesterday, agency officials said.

Mr. Deutsch's resignation came on the same day that officials at Texas A&M University confirmed that he did not graduate from there, as his résumé on file at the agency asserted.

A copy of Mr. Deutsch's résumé was provided to The Times by someone working in NASA headquarters who, along with many other NASA employees, said Mr. Deutsch played a small but significant role in an intensifying effort at the agency to exert political control over the flow of information to the public.

Such complaints came to the fore starting in late January, when James E. Hansen, the climate scientist, and several midlevel public affairs officers told The Times that political appointees, including Mr. Deutsch, were pressing to limit Dr. Hansen's speaking and interviews on the threats posed by global warming.

Yesterday, Dr. Hansen said that the questions about Mr. Deutsch's credentials were important, but were a distraction from the broader issue of political control of scientific information.

"He's only a bit player," Dr. Hansen said of Mr. Deutsch. " The problem is much broader and much deeper and it goes across agencies. That's what I'm really concerned about."

"On climate, the public has been misinformed and not informed," he said. "The foundation of a democracy is an informed public, which obviously means an honestly informed public. That's the big issue here."