The Planetarium Cone

The Planetarium Cone

The Planetarium Cone

Like the Louvre Pyramid, I like it when old and new clash in architecture. Behind the Greenwich observatory, in the same grounds, is the Peter Harrison Planetarium where they have erected a bronze cone with the following characteristics: The north side of the cone is aligned with the point in the sky perpendicular to the Greenwich local horizon (zenith) / The sloping southern side points towards the north celestial pole (Pole star). The angle of the slope is 51º28’44”, equal to the latitude of the Royal Observatory / The top of the cone is sliced at an angle parallel to the celestial equator / The planetarium is aligned with the local meridian (north-south line). I think it is pretty cool too 🙂

Leave a Reply

Your email address will not be published. Required fields are marked *