Friday, July 10, 2020

7,500 tonnes of dead, artificially manufactured objects in space

Lithium rise in the universe

A study published recently in Nature Astronomy presented solid observational evidence concerning the occurrence of lithium generation during the core helium (He) ignition phase of low-mass stars such as the Sun.


The scientists used large surveys of the 'Galaxy Archeology Project, Anglo-Australian Telescope, Australia' (Anglo-Australian Telescope, Australia- GALAH) and spectra of thousands of stars collected from the European Space Mission (GAIA).
 

GAIA is a space observatory of the European Space Agency, which was launched in 2013.
Origin of lithium
 

Light flammable, metal lithium (Li) has undergone many changes in modern communications equipment and transport sector. At present, a large part of the technology is powered by lithium and its different types, but the question about lithium is where does this element come from? The origin of much of lithium can be traced to a single event — the Big Bang, which occurred about 13.7 billion years ago by which the current universe was also formed.

Over time, the amount of lithium in the physical universe has increased four times, which can be said to be much lower than that of carbon, nitrogen, oxygen, iron, nickel and other elements as these elements increased one million times. is. Lithium has a relatively small amount of growth.

The source of such a low amount of lithium is a matter of debate among scientists. Lithium is believed to be formed by the breakdown of heavy elements such as carbon and oxygen in the interstellar space from high-energy cosmic rays.

Large scale protrusion and stellar explosions by stars are the primary contributors to this significant growth of heavy elements. However lithium is considered an exception.
 

Growing garbage in space Why in discussion?

On 2 April, the 8.5-ton Wazni Chinese space station Tiangong-1 fell out of its orbit and was destroyed by falling into the South Pacific Ocean in the northwest direction of Tahiti. The incident put a stop to the speculation of Tiangong falling to different places on Earth, but has again brought the debate on space waste into the spotlight.
 

What is Space Trash?
 

Many man-made satellites that are sent into the Earth's orbit are destroyed there and are orbiting the Earth in small fragments.

According to the information provided by NASA, this debris is moving around the Earth at very high speed. This includes the remains of dead spacecrafts, rockets, satellite launch vehicles, missile shrapnel and other passive electronic devices.

Problem
 

This waste scattered in space can be very dangerous not only in the orbit of satellites, but also for our atmosphere. If a large piece enters our atmosphere without being completely destroyed, it can cause a destructive effect.

These debris are also able to disrupt the communication system through molecular reactions in space.

In addition, this debris can affect the services provided by satellites and their launch.

Currently there is an estimated 7,500 tonnes of dead, artificially manufactured objects in space.

The speed of space waste is about 28,000 km. Hourly, which is enough to destroy a spacecraft.
Growing garbage in space

What is it


Tiangong-1?


TIANGONG-1 was launched in September 2011. It is also referred to as 'Heavenly Places' in English.

This was China's first prototype space lab project. It was established about 350 kilometers above the Earth's orbit.

    TIANGONG-1 is a kind of research laboratory where China used to send its astronauts.


    It was used by China to demonstrate its spacecraft docking capabilities.


    This lab was first started for a period of two years, later its deadline was extended.

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