A FORMER astronaut accused of trying to kidnap a romantic rival is to plead temporary insanity to the charges, according to a US court document.

A FORMER US astronaut charged with trying to kidnap the girlfriend of a space shuttle pilot did not wear nappies during her 1,500km trip to confront her romantic rival, her attorney said yesterday.

A Nasa astronaut accused of trying to harm a romantic rival has entered a written plea of not guilty to a charge of attempted murder, according to court records.