John Harmon Biography

Historical biography and chronological timeline for John Harmon, based on 2 World History Database records associated with United States of America.

2 records1991–19922 events0 places

Chronological biography

1991

Mercury Polar Ice1991

Science / Astronomy

Arecibo observations confirm a strong polar radar signature on Mercury that supports the interpretation of ice in permanently shadowed craters.

1992

Mercury South Polar Ice1992

Science / Astronomy

Harmon observes Mercury again when the southern hemisphere is favourably presented, helping confirm a south-polar radar-bright feature.

Record provenance

This biography is assembled from World History Database records filtered by country and personal-name fields. Exact duplicate display records are removed. The database is an index rather than a complete narrative biography; formal research should verify entries against relevant primary or specialist sources.