<https://osservatoriourania.it/event/6-lezione-corso-di-astronomia-meccanica-celeste/>
<http://schema.org/datePublished>
"2019-09-29T07:38:03+00:00"^^<http://schema.org/Date>
<https://osservatoriourania.it/event/6-lezione-corso-di-astronomia-meccanica-celeste/>