"Hubble" space telescope is landing on the ground

From 1990 to the present, the Hubble Space Telescope has been redefining our understanding of the universe. However, the Hubble telescope is in trouble, and it is now heading towards the earth, and NASA has not made any plans to stop its orbital decay process.

"Hubble" space telescope from the ground about a few hundred kilometers away every 97 minutes around the earth to run a week. NASA has done several maintenance work on the Hubble telescope, adjusting optical equipment, improving camera effects, replacing wear parts, and pushing up to higher tracks, including the last maintenance performed in 2009.

But with the retired space shuttle, the Hubble Space Telescope is heading for an unavoidable end of life, and even if the precision-guided sensor does not fail, the reaction wheels remain up and the communications equipment is not faulty, but this has changed the world The space telescope can not escape their own fate.



Once the spacecraft re-enter the Earth's atmosphere, it is almost inevitable to break down into many pieces

"Hubble" space telescope is currently 353 miles from the ground (about 568 km) on the track to run. We usually define the boundary between the Earth's atmosphere and outer space is about 60 miles (about 100 km), but in fact this situation is much more complex than expected. The atmosphere never has a real boundary, with the height rising, bound by the Earth's gravitational atoms and molecules extended to 10,000 km height, the atmosphere is also spreading. In the space area of more than 10,000 km, the Earth's atmosphere and the solar wind are indistinguishable, they are made of thin heat atoms and ionized particles.