<page_title> Orders of magnitude (length) </page_title> <section_title> Human to astronomical scale </section_title> <table> <cell> 1 metre <col_header> Factor (m) </col_header> </cell> <cell> Since 1983, defined as length of the path travelled by light in vacuum during a time interval of 1/299 792 458 of a second. <col_header> Item </col_header> </cell> </table>
Light travels 1 metre in ​¹⁄₂₉₉ ₇₉₂ ₄₅₈ of a second.