The Long March 5B rocket carrying China’s space station module has fallen into Earth’s low orbit and is now vulnerable to collapse.
The rocket successfully launched the Tianhe module last week, which will become home to the Chinese space station (CSS) in the future.Unfortunately, the 30-meter rocket also reached orbit and is now considered. One of the largest rockets ever to make uncontrolled re-entry.
It is unusual for a rocket to reach the speed necessary to reach orbit. But now they travel around the world every 90 minutes or 7 kilometers every second. Passing north of New York, Madrid and Beijing, and as far as Chile and New Zealand.
There were fears that the rocket would land on inhabited areas. The last time the Long March rocket was launched in May 2020, it was reported that debris had fallen into villages in Ivory Coast. The speed of the rocket means that scientists do not yet know when it will fall. But it is likely to be done before May 10, 2021.
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Will the fragments hit someone or not?
“Worst case [scenario] It is one of the bars of the structures that hit someone, possibly fatal. But many people are unlikely to die, ”said astrophysicist Jonathan McDowell at the Harvard Center for Astrophysics. independent.
He added that the debris will travel at speeds of about 100 miles per hour, so there can be expensive property damage. But as it spreads over 100 miles long, only one or two would have entered the populated area.
Adam SmithMay 4, 2021, 4:21 PM
Should we be afraid of falling materials?
Since the space agency cannot predict where the rocket will fall, there is no detailed risk assessment for those involved in the falling debris.
However, the ESA said residents should not be concerned about being struck by the falling debris.
“Generally, most objects will burn in the entire atmosphere during re-entry. Fragments of large objects or components made of materials with a high melting point may have survived to the ground or the ocean surface, ”says.
“Because these events are rare and about 75 percent of the Earth’s surface is covered by water, while most areas are largely uninhibited, the risk to any individual is smaller than the accepted risk. There are several general aspects such as Found when driving a car for daily life “
Adam SmithMay 4, 2021, 15:26
Where can it be avoided?
While we may not know where it is going to land. But scientists know where the Long March 5B will be avoided.
Since the CZ-5B’s (debris classification) orbit is tilted at 41 degrees to the Earth’s axis, any debris will not fall further, either north or south of latitude.
“So the vulnerable zone includes any part of the Earth’s surface between latitudes 41N and 41S. This is short and for anything involving ESA member states, including parts of Spain, Italy and Greece,” the ESA said.
Adam SmithMay 4, 2021, 2:02 PM.
What will happen when the rocket re-enters the world?
While rockets are likely to fall into the ocean simply because most of the Earth is covered with water, astronomers believe some rockets will survive re-entry.
This would be equivalent to “a small plane that was scattered over 100 miles,” said astrophysicist Jonathan McDowell at the Harvard Center for Astrophysics.
Right now, predicting a rocket fall is very difficult. But it is expected to return to Earth on May 10. Once the date has been confirmed, experts were able to narrow the landing time to six hours.
“The Long March 5B main stage is seven times larger than the second phase of the Falcon 9, which generated media attention a few weeks ago when it came back over Seattle and dropped a second pressure tank. “I think that by current standards it is unacceptable to let it re-enter without control. Since 1990, nothing more than 10 tons was deliberately left in the ring. Orbit to re-enter without control “
Adam SmithMay 4, 2021, 12:22 PM
Long March 5B: Follow the rocket
The rocket is currently in those parameters. But it fell today at 10:00 AM GMT when the rocket was over Africa it dropped nearly 160 kilometers.
Amateur observations from the ground showed regular flashes of light from the night sky, suggesting they were out of control.
It is likely that most rockets will crash when they crash. But some debris will remain.
“It is always difficult to estimate the surviving mass and the number of parts without knowing the model of the material, but a reasonable” rule of thumb “is approximately 20-40 percent of the original dry mass,” said Chief Executive Holger Krag. The European Space Agency’s space safety program says.
Adam SmithMay 4, 2021, 12:10 PM