It's about 0.00000000000000000000002 times as heavy as The Sun.
In other words, 25,000 tonnes is 0.0000000000000000000000130 times the weight of The Sun, and the weight of The Sun is 76,999,999,999,999,997,902,848.0000000000000000000000000 times that amount.The sun has a mass of 2,000,000,000,000,000,000,000,000,000 (2 octillion) tonnes which represents 99.9% of the solar system's total mass. 98.7% of the sun's mass consists of hydrogen and helium — respectively the lightest and second-lightest elements in the universe.
It's about 0.000000000000000004 times as heavy as The Earth.
In other words, 25,000 tonnes is 0.00000000000000000418510 times the weight of The Earth, and the weight of The Earth is 238,940,000,000,000,000.00000000000000000000000 times that amount.The mass of the planet Earth is 5,973,600,000,000,000,000,000 (5.973 sextillion) tonnes. The element iron makes up about 32% of that mass, or 1,917,500,000,000,000,000,000 (1.917 sextillion) tonnes.
It's about one-two-hundred-fiftieth as heavy as The Great Pyramid of Giza.
In other words, the weight of The Great Pyramid of Giza is 240 times 25,000 tonnes.(a.k.a. Pyramid of Khufu, a.k.a. Pyramid of Cheops) (Cairo, Egypt)
The Great Pyramid of Giza has an estimated mass of 5,900,000 tonnes. The 2,300,000 stones used in the construction of the pyramid weighed an average 2.27 tonnes and were quarried from distances of up to 805 km (500 mi) away.
It's about one-thirtieth as heavy as The Golden Gate Bridge.
In other words, 25,000 tonnes is 0.0311 times the weight of The Golden Gate Bridge, and the weight of The Golden Gate Bridge is 32.20 times that amount.(San Francisco, California and Marin County, California) (Post 1986 weight reduction; total weight of bridge, anchorage, and approaches)
Following the completion of the 1986 project to eliminate excess material, the total weight of the Golden Gate Bridge — including its anchorages and approaches — is 805,000 tonnes. The two main cables in the spanning the bridge are spun out of a total of 129,000 km (80,200 mi) of wire.
It's about one-fifteenth as heavy as The Empire State Building.
It's about one-tenth as heavy as The Sears Tower.
In other words, 25,000 tonnes is 0.12390 times the weight of The Sears Tower, and the weight of The Sears Tower is 8.071 times that amount.(officially "Willis Tower" as of 2009) (Chicago, Illinois)
The Willis Tower weighs approximately 201,800 tonnes. The outer wall surface of the Tower is covered with black anodized aluminum panels which would total 110,000 sq. m (28 acres) if laid out together.
It's about one-fifth as heavy as The CN Tower.
In other words, 25,000 tonnes is 0.212030 times the weight of The CN Tower, and the weight of The CN Tower is 4.71630 times that amount.(a.k.a. La Tour CN, a.k.a. Canadian National Tower, a.k.a. Canada's National Tower) (Toronto, Canada)
The CN Tower weighs approximately 117,910 tonnes. The Tower is home to the world's highest glass floor — a viewing area that allows visitors to look straight down 342 m (1,120 ft) to the ground below.