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Hace 18 horas · The second-tallest structure in the world is the 679-metre-tall (2,227 ft) Merdeka 118 in Kuala Lumpur, Malaysia, while the third-tallest self-supporting structure and the tallest tower in the world is the Tokyo Skytree (634 m or 2,080 ft). The tallest guyed structure is the KRDK-TV mast in North Dakota, U.S. at 630 metres (2,060 ft).
Hace 18 horas · AD An extreme oxygen-rich red hypergiant that has experienced two dimming periods in the 20th century where the star became dimmer by up to 2.5 magnitudes. Potentially the largest known star in the Milky Way. AH Scorpii: 1,411 ± 124: AD RSGC1-F06 1,382 +298 −384: L/T eff: CD-33 12241: 1,359: L/T eff: NML Cygni < 1,350 +195 −229: AD
