was first observed

URI: https://gptkb.org/prop/was_first_observed
4 triples
GPTKB property
Random triples
Subject Object
gptkb:Centaurus_X-49 gptkb:1971
gptkb:Women's_Equality_Day gptkb:1971
gptkb:Centaurus_X-40 gptkb:1971
gptkb:Supernova in 1572 by Tycho Brahe