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If they can't even walk the last thing they should to is try to fly
Out-of-control Chinese space station could crash into Earth in 21 days
9 Mar, 2018 3:03pm
6 minutes to read
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Image of China's space station Tiangong-1 taken French astrophotographer Alain Figer on 27 November 2017. It was taken from a ski area in the Hautes-Alpes region of southeast France. Photo / ESA
Daily Mail
Daily Mail reported.
The doomed 8.5-tonne craft, which has been hurtling towards Earth since control was lost in 2016, is believed to contain dangerous hydrazine.
/arc-anglerfish-syd-prod-nzme.s3.amazonaws.com/public/LDPZE6AL4VDDRLNVBA2GIOH5KY.jpg)
While a precise landing location remains unclear, ESA has provided the latitudes between which Tiangong-1 is likely to land. Photo / Supplied
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They will only know the precise date it will impact and exactly where debris will fall during the finals weeks of its decline.
Experts from the European Space Agency (ESA), based in Paris, are among those tracking Tiangong-1, which means "heavenly palace".
Their Space Debris Office in Darmstadt, Germany, made the prediction earlier this week.
This narrows down from their previous estimate of March 17 to April 21.
In recent days Aerospace, a US research organisation that advises government and private enterprise on space flight, also updated its re-entry window.
It said the space station will enter the Earth's atmosphere on April 3, give or take a week.
Related articles:
WORLD
Chinese space station crashing back to Earth - NZ in possible path
7 Mar, 2018 2:54pm
4 minutes to read
Exactly where it will hit is slightly harder to predict, although experts agree it will be somewhere between latitudes of 43° north and 43° south.
The chances of re-entry are slightly higher in northern states in the US, central Italy, northern Spain, northern China, New Zealand, the Middle East and parts of South Africa and southern Africa.
"Every couple of years something like this happens, but Tiangong-1 is big and dense so we need to keep an eye on it," Jonathan McDowell, an astrophysicist from Harvard University told the Guardian.
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 dangerous hydrazine.
However, due to changing conditions in space, it is not possible to accurately predict where the module will land.
In recent months, the spacecraft has been speeding up and it is now falling by around 6km (3.7 miles) a week. In October it was falling at 1.5km (0.9 miles) a week.
"It is only in the final week or so that we are going to be able to start speaking about it with more confidence," said Dr McDowell.
"I would guess that a few pieces will survive re-entry. But we will only know where they are going to land after after the fact."
Website Satflare, which provides online 3D tracking of more than 15,000 satellites, has calculated what it thinks are the chances of the space station entering the atmosphere during the next three months.
According to its analysis of orbital elements gathered during the last months, the re-enter may occur in March (20 per cent), in April (60 per cent) or in May 2018 (20 per cent).
These predictions may also change as new orbital measurements will be available.
Aerospace Corp has also issued its own forecast over the likelihood of being hit by falling debris.
/arc-anglerfish-syd-prod-nzme.s3.amazonaws.com/public/Q6VPW6SZXNDTTLCETWS2YWHFFI.jpg)
It is being carried aboard the Tiangong-1 space station which is hurtling towards Earth.
The warning over exposure to the chemical came from Aerospace Corp, a non-profit corporation based in El Segundo, California, which provides technical guidance and advice on all aspects of space missions.
Hydrazine is a colourless, oily liquid or sometimes white crystalline compound with a very highly reactive base.
It has a number of industrial, agricultural and military uses, including in rocket fuel.
Symptoms of short-term exposure to high levels of hydrazine include irritation of the eyes, nose, and throat, dizziness, headache, nausea, pulmonary edema, seizures, and coma, according to the United States Environmental Protection Agency (EPA).
Long-term exposure can also damage the liver, kidneys, and central nervous system in humans.
The liquid is corrosive and may produce dermatitis from skin contact in humans and animals.
Increased incidences of lung, nasal cavity, and liver tumours have been observed in rodents exposed to hydrazine.
The EPA has classified hydrazine as a Group B2, a probable human carcinogen.
Out-of-control Chinese space station could crash into Earth in 21 days
9 Mar, 2018 3:03pm
6 minutes to read
Image of China's space station Tiangong-1 taken French astrophotographer Alain Figer on 27 November 2017. It was taken from a ski area in the Hautes-Alpes region of southeast France. Photo / ESA
Daily Mail
Daily Mail reported.
The doomed 8.5-tonne craft, which has been hurtling towards Earth since control was lost in 2016, is believed to contain dangerous hydrazine.
While a precise landing location remains unclear, ESA has provided the latitudes between which Tiangong-1 is likely to land. Photo / Supplied
Advertise with NZME.
They will only know the precise date it will impact and exactly where debris will fall during the finals weeks of its decline.
Experts from the European Space Agency (ESA), based in Paris, are among those tracking Tiangong-1, which means "heavenly palace".
Their Space Debris Office in Darmstadt, Germany, made the prediction earlier this week.
This narrows down from their previous estimate of March 17 to April 21.
In recent days Aerospace, a US research organisation that advises government and private enterprise on space flight, also updated its re-entry window.
It said the space station will enter the Earth's atmosphere on April 3, give or take a week.
Related articles:
WORLD
Chinese space station crashing back to Earth - NZ in possible path
7 Mar, 2018 2:54pm
4 minutes to read
Exactly where it will hit is slightly harder to predict, although experts agree it will be somewhere between latitudes of 43° north and 43° south.
The chances of re-entry are slightly higher in northern states in the US, central Italy, northern Spain, northern China, New Zealand, the Middle East and parts of South Africa and southern Africa.
"Every couple of years something like this happens, but Tiangong-1 is big and dense so we need to keep an eye on it," Jonathan McDowell, an astrophysicist from Harvard University told the Guardian.
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 dangerous hydrazine.
However, due to changing conditions in space, it is not possible to accurately predict where the module will land.
In recent months, the spacecraft has been speeding up and it is now falling by around 6km (3.7 miles) a week. In October it was falling at 1.5km (0.9 miles) a week.
"It is only in the final week or so that we are going to be able to start speaking about it with more confidence," said Dr McDowell.
"I would guess that a few pieces will survive re-entry. But we will only know where they are going to land after after the fact."
Website Satflare, which provides online 3D tracking of more than 15,000 satellites, has calculated what it thinks are the chances of the space station entering the atmosphere during the next three months.
According to its analysis of orbital elements gathered during the last months, the re-enter may occur in March (20 per cent), in April (60 per cent) or in May 2018 (20 per cent).
These predictions may also change as new orbital measurements will be available.
Aerospace Corp has also issued its own forecast over the likelihood of being hit by falling debris.
It is being carried aboard the Tiangong-1 space station which is hurtling towards Earth.
The warning over exposure to the chemical came from Aerospace Corp, a non-profit corporation based in El Segundo, California, which provides technical guidance and advice on all aspects of space missions.
Hydrazine is a colourless, oily liquid or sometimes white crystalline compound with a very highly reactive base.
It has a number of industrial, agricultural and military uses, including in rocket fuel.
Symptoms of short-term exposure to high levels of hydrazine include irritation of the eyes, nose, and throat, dizziness, headache, nausea, pulmonary edema, seizures, and coma, according to the United States Environmental Protection Agency (EPA).
Long-term exposure can also damage the liver, kidneys, and central nervous system in humans.
The liquid is corrosive and may produce dermatitis from skin contact in humans and animals.
Increased incidences of lung, nasal cavity, and liver tumours have been observed in rodents exposed to hydrazine.
The EPA has classified hydrazine as a Group B2, a probable human carcinogen.
