Filtro Optolong L-Para 2"

31:37
Combattere l'inquinamento luminoso con i filtri interferenziali: 6 filtri a confronto

8:44
TEST OPTOLONG L-PARA FILTER

15:00
Bill Nye REVEALS a SHOCKING Voyager 1 Discovery After 45 Years!

21:39
ELON MUSK: les RAISONS de ses MENSONGES - On Se l'Demande #139 - Le JDE

11:40
Telescopio Dobson Orion SkyQuest XX12g GoTo Truss Tube

19:04
Skywatcher Wave 150i mount - Review and performance test

2:00:00
Dark Violin & Cello Music for Deep Focus

12:55