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Apr 3, 2018 15:02:16   #
badbobby Loc: texas
 
Chinese Space Station Comes Tumbling to Earth Over Pacific Ocean
By Stephanie Pappas, Live Science Contributor | April 1, 2018 08:44pm ET

.

After weeks of uncertainty about when and where it would crash, the Chinese space station Tiangong-1 has tumbled to Earth in the southern Pacific Ocean at about 8:16 p.m. EDT (0016 GMT on April 2), the U.S. Strategic Command's Joint Force Space Component Command (JFSCC) reported.

Despite the uncontrolled nature of the re-entry, the European Space Agency (ESA) had previously estimated that the chances of being hit by debris from Tiangong-1 were 10 million times smaller than the chance of being hit by lightning in any given year (about 1 in 1.4 million). [In Photos: A Look at China's Space Station That's Crashing to Earth]

Tiangong-1 weighed about 18,739 pounds (8.5 metric tons), minus some burned fuel, when it fell out of orbit. The space station first launched in 2011, but ended its active life as an experimental space station after the second of two crews left it in 2013. It orbited about 217 miles (350 kilometers) above Earth for most of its time in space, but Chinese officials announced in March 2016 that the space station was no longer communicating with Earth. Thfat meant that controllers on Earth could not fire the space station's engines as its orbit began to decay, leaving no way to control where Tiangong-1 would enter the atmosphere or land on Earth.

Larger objects than Tiangong-1 have crashed to Earth, most notably NASA's Skylab in 1979, which weighed 81 tons (73 metric tons). During a partially controlled re-entry, Skylab missed its target in the Indian Ocean, scattering some unburned pieces in western Australia. [The Weirdest Things That Fell From The Sky]

The Russian space station Mir weighed a whopping 132.3 tons (120 metric tons), but its 2001 re-entry over the South Pacific was controlled. Prior to Tiangong-1, the largest object to fall back to Earth without any control was Salyut-2, a Soviet space station that fell out of orbit after an accident in 1973. It weighed in at 20.2 tons (18.3 metric tons).

Re-entry predictions
The fall of Tiangong-1 was monitored by the Inter-Agency Space Debris Coordination Committee, an international group that included NASA, the ESA as well as the space agencies of 11 other nations. According to the ESA, the members of the committee pooled their predictions of Tiangong's re-entry time and will be using the results to better understand how to predict the behavior of space debris.

Even in the days leading to the crash, these agencies couldn’t predict anything more specific than that Tiangong-1 would impact somewhere between 42.8 degrees North and 42.8 degrees South latitudes sometime between March 21 to April 2. It was only in the last day that the ESA narrowed the final plunge to within 24 hours and then as it got closer, to within a couple of hours.

Reply
Apr 4, 2018 15:02:30   #
bahmer
 
badbobby wrote:
Chinese Space Station Comes Tumbling to Earth Over Pacific Ocean
By Stephanie Pappas, Live Science Contributor | April 1, 2018 08:44pm ET

.

After weeks of uncertainty about when and where it would crash, the Chinese space station Tiangong-1 has tumbled to Earth in the southern Pacific Ocean at about 8:16 p.m. EDT (0016 GMT on April 2), the U.S. Strategic Command's Joint Force Space Component Command (JFSCC) reported.

Despite the uncontrolled nature of the re-entry, the European Space Agency (ESA) had previously estimated that the chances of being hit by debris from Tiangong-1 were 10 million times smaller than the chance of being hit by lightning in any given year (about 1 in 1.4 million). [In Photos: A Look at China's Space Station That's Crashing to Earth]

Tiangong-1 weighed about 18,739 pounds (8.5 metric tons), minus some burned fuel, when it fell out of orbit. The space station first launched in 2011, but ended its active life as an experimental space station after the second of two crews left it in 2013. It orbited about 217 miles (350 kilometers) above Earth for most of its time in space, but Chinese officials announced in March 2016 that the space station was no longer communicating with Earth. Thfat meant that controllers on Earth could not fire the space station's engines as its orbit began to decay, leaving no way to control where Tiangong-1 would enter the atmosphere or land on Earth.

Larger objects than Tiangong-1 have crashed to Earth, most notably NASA's Skylab in 1979, which weighed 81 tons (73 metric tons). During a partially controlled re-entry, Skylab missed its target in the Indian Ocean, scattering some unburned pieces in western Australia. [The Weirdest Things That Fell From The Sky]

The Russian space station Mir weighed a whopping 132.3 tons (120 metric tons), but its 2001 re-entry over the South Pacific was controlled. Prior to Tiangong-1, the largest object to fall back to Earth without any control was Salyut-2, a Soviet space station that fell out of orbit after an accident in 1973. It weighed in at 20.2 tons (18.3 metric tons).

Re-entry predictions
The fall of Tiangong-1 was monitored by the Inter-Agency Space Debris Coordination Committee, an international group that included NASA, the ESA as well as the space agencies of 11 other nations. According to the ESA, the members of the committee pooled their predictions of Tiangong's re-entry time and will be using the results to better understand how to predict the behavior of space debris.

Even in the days leading to the crash, these agencies couldn’t predict anything more specific than that Tiangong-1 would impact somewhere between 42.8 degrees North and 42.8 degrees South latitudes sometime between March 21 to April 2. It was only in the last day that the ESA narrowed the final plunge to within 24 hours and then as it got closer, to within a couple of hours.
Chinese Space Station Comes Tumbling to Earth Over... (show quote)


Very good at least it missed the good old USA.

Reply
Apr 4, 2018 15:59:57   #
badbobby Loc: texas
 
bahmer wrote:
Very good at least it missed the good old USA.


I posted that so Slat could come out from under his bed
You're safe now Slat

Reply
Apr 4, 2018 16:01:50   #
bahmer
 
badbobby wrote:
I posted that so Slat could come out from under his bed
You're safe now Slat


The Sgt. Major will have to go tell him.

Reply
Apr 4, 2018 16:03:50   #
badbobby Loc: texas
 
bahmer wrote:
The Sgt. Major will have to go tell him.


As long as he's under the bed
with a pillow over his head
she don't have to feed him

Reply
Apr 4, 2018 16:06:26   #
bahmer
 
badbobby wrote:
As long as he's under the bed
with a pillow over his head
she don't have to feed him


She will be able to buy herself a new car in no time at all.

Reply
Apr 4, 2018 16:13:29   #
badbobby Loc: texas
 
bahmer wrote:
She will be able to buy herself a new car in no time at all.


and a new ensemble for spring

Reply
Apr 4, 2018 16:15:36   #
bahmer
 
badbobby wrote:
and a new ensemble for spring


She may not tell him to come out at all.

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