Description: The coin's obverse labels "crust" and "core" in German. "Crab pulsar" names a neutron star from the 1054 supernova, with "1,4 M☉" for its solar mass, "30rps" for its rotation, and "r~10km" for its radius.
Inscription: 2023 REPUBLIK OESTERREICH 20 EURO
KRUSTE KERN
r ~ 10 km
30rps 1,4 M ⊚
KREBSPULSAR
Translation: Crust Core
r ~ 10 km
30rps 1,4 M ☉
CRAB PULSAR