Andromeda Proper Motion Measured31 May 2012
Hubble measurements constrain M31's sideways motion against distant background galaxies, enabling a quantitative forecast of its future encounter with the Milky Way.
World History Database · Biography facts · Archive · United States of America · van der Marel · Roeland van der Marel
Historical person
Roeland van der Marel Biography
Historical biography and chronological timeline for Roeland van der Marel, based on 1 World History Database records associated with United States of America.
1 records2012–20121 events1 places
Chronological biography
2012
Titles and roles
Astronomer
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.