In 2013, discontinued operation of the station, and in 2016 over her lost control.
While it's exact re-entry location can not be pinpointed, space agencies believe the doomed piece of space junk has a higher chance of hitting New Zealand, the US, Europe and Australia.
The Chinese space agency launched Tiangong-1 as the "Heavenly Palace" around 2011, but five years afterward it spun out of control.
There is no need for alarm or concern of being hit by the space debris.
This narrows down from their previous estimate of March 17 to April 21.
In January 2018, The Aerospace Corporation predicted the Tiangong-1 will likely re-enter the Earth's atmosphere sometime during March 2018. "One thing we do know is that [Tiangong-1] will reenter between 43 degrees North and 43 degrees South latitude, but beyond that we don't know the precise location".
The chances of re-entry were slightly higher in northern China, the Middle East, central Italy, northern Spain and the northern states of the US, New Zealand, Tasmania, parts of South America and southern Africa.
Authorities have been closely watching Tiangong-1 and trying to determine where and when it will collide with Earth.
While most of it will burn up during re-entry, around 10 to 40 per cent of the satellite is expected to survive as debris, and some parts may contain risky hydrazine.
"Once it starts to break apart, each of the pieces will fall along the track, but they can be spread out by several hundred miles", he added. It's thought that more information will be gleaned in the coming weeks, although we may not know for sure where Tiangong-1 will hit until its final hours.
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"I would guess that a few pieces will survive re-entry".
Recently, a top Chinese spaceflight engineer denied that the space station was out of control, Reuters reported.
According to experts the Tiangong-1 is set to re-enter Earth's atmosphere between March 29 and April 9 the Daily Mail reports.
These predictions may also change as new orbital measurements will be available.
The chances of actually being hit by debris are pretty small, according to Aerospace.
Aerospace in a statement said that there was "a chance that a small amount of debris" from the module will survive re-entry and hit the Earth.
Once it enters Earth's atmosphere, the vast majority of the craft will vaporize, causing it to light up skies like a shooting star on steroids.
The launch was positioned as a symbol of turning the country into a space superpower.
"Even shortly before re-entry, only a very large time and geographical window can be estimated".
In any case, he said, his agency was coordinating closely with worldwide peers and they have asked China how much hydrazine was left in the spacecraft. As Braithwaite reports, denser parts of the station-like engines or batteries-may survive with chunks as large as 220 pounds making it to the surface.