Pluto
New Horizons' Ralph spectrometer detects frozen methane on Pluto during approach, confirming the molecule from spacecraft observations.
Historical biography archive · Updated 2026-11-03
William Grundy Biography and Timeline
Follow William Grundy through 4 dated historical records for United States of America.
William Grundy, historical timeline
A chronological timeline drawn from matching World History Database records.
4Distinct records
1 of 1Page
2015–2015Years on this page
2015
Pluto
A New Horizons methane map shows that methane ice is distributed unevenly across Pluto's surface.
Pluto Atmosphere
Color observations show that Pluto's high-altitude atmospheric haze appears blue when viewed in scattered sunlight.
Pluto
New Horizons compositional mapping identifies numerous exposed regions of water ice on Pluto's surface.
Records, sources and methodology
These dates and descriptions come from the historical_events database. Exact duplicate records have been collapsed. Names are grouped by the country, Name 2 and Name 1 fields; records with missing Name 2 cannot be reliably assigned to an individual biography. Check the underlying sources before formal citation.