Auditors cite projects such as asteroid explorer, Earth-like planet hunter.
The Government Accountability Office, the congressional budget watchdog, found cost overruns in at least nine big NASA projects:
Mars Science Laboratory. Price: $2.3 billion, up $657.4 million since October 2007. Launch delayed 25 months to October 2011.
NPOESS Preparatory Project a satellite to study atmosphere and sea temperatures. Price: $794.6 million, up $121.8 million since October 2006. Launch delayed 26 months to June 2010.
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