Largest liquid mirror

According to Official Guinness Records,

The largest Zenith telescope in Canada uses a mirror made from liquid mercury. By spinning the 3 tonne (6,613 lb), 6 m (19 ft 8 in) diameter mercury mirror, the liquid forms a perfect concave mirror shape suitable for astronomical observations.

For a complete list of Unknown date records, please visit Unknown date Guinness Records in Canada.

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