Hubble Images Andromeda Double Nucleus
Hubble observations resolve two distinct brightness peaks in the central region of M31, revealing the unusual double structure of its nucleus.
Historical biography archive · Updated 2026-11-03
Tod R. Lauer Biography and Timeline
Follow Tod R. Lauer through 2 dated historical records for United States of America.
Tod R. Lauer, historical timeline
A chronological timeline drawn from matching World History Database records.
2Distinct records
1 of 1Page
1991–1993Years on this page
1991
1993
Andromeda Double Nucleus Announced
NASA announces Hubble evidence that the core of M31 contains a double nucleus, challenging simple models of the galaxy's central stellar structure.
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.