2019
Videos
2019 was a common year starting on Tuesday of the Gregorian calendar, the 2019th year of the Common Era and Anno Domini designations, the 19th year of the 3rd millennium and the 21st century, and the
The Event Horizon Telescope image of the core of M87 black hole. The central dark spot is the shadow of M87* and is larger than the black hole's event horizon.
Notre-Dame fire
Videos
On 15 April 2019, at 18:18 CEST, a structural fire broke out in the roof space of Notre-Dame de Paris, a medieval Catholic cathedral in Paris, France, part of the "Paris, Banks of the Seine" UNESCO Wo
2019
…mass protests, Omar al-Bashir is deposed as President of Sudan in a coup d'état, after nearly 30 years in office. April 15 – During Holy Week, a major fire engulfs Notre-Dame Cathedral in Paris, resulting in the roof and main spire collapsing. April 16 – The Howse Peak avalanche kills three noted mountaineers…
Notre-Dame de Paris aflame, as seen from the Square René Viviani
Interior of nave showing rib vaulting; in walls are clerestory windows (top), arches to triforium (middle), and arches to side aisles (bottom).
Underside of rib vaulting, whose thrust outward onto the walls is countered by the inward thrust of the flying buttresses. If the vaulting had collapsed, the walls could have collapsed into the nave.
Timber roof framing; vaulted ceiling lies below walkways