Permanent historical factsheet

Upsilon Andromedae Multiple-Planet System

United States of America · Science / Astronomy. Chronological records rendered directly from the World History Database.

3Records
1999Date range
3Named people
1Places

Chronological records

1999

R. Paul Butler1999

California · Science / Astronomy

Co-discovers additional giant planets orbiting Upsilon Andromedae.

Debra Fischer1999

California · Science / Astronomy

Helps establish that Upsilon Andromedae hosts multiple giant planets.

Geoffrey Marcy1999

California · Science / Astronomy

Reports additional planets around Upsilon Andromedae, establishing a major early multiplanet system.

Names involved

Debra FischerGeoffrey MarcyR. Paul Butler

Provenance

This factsheet is generated from stored World History Database records matching the country, broad category, detailed category and exact Event value shown above. Duplicate display records are collapsed; database wording is otherwise preserved. Source provenance varies by record, so formal academic citation should be checked against the relevant primary source, archive or specialist historical reference.