The Allen Commission found that the main null corrector, a testing device used to achieve a properly shaped non-spherical mirror, had been incorrectly assembled--one lens was wrongly spaced by 1.3 mm.. 
Atti (406 - 453) ló jẹ́ ọba àwọn hunní ẹ̀yà alárìnká láti Mongolia láti ọdún 434 títí dé 453 nígbà tó kú.. 