Презентация "Космический мусор"

Space Debris

A Green Planet?

• Every year, in almost every country around the world, people do their part to clean up our Earth.
• Recycling programs are everywhere, and whether our involvement is large or small, we all contribute to help make our home a better place.
• But what about our Earth’s home?
• Who is looking out for outer space?

What is out there?

• Space debris is also called orbital debris, space junk and space waste.
• It is the man-made objects that are in orbit around the Earth that no longer serve any useful purpose to us.
• They can include anything from entire used rocket stages and defunct satellites to explosion fragments, paint flakes, dust, slag from solid rocket motors, coolant released by RORSAT nuclear powered satellites, deliberate insertion of small needles, and other small particles from equipment.
• Currently, 200 new objects are added annually.

CONCLUSION

• Space debris has become the topic of great concern in recent years. Space debris creation can’t be stopped completely, but it can be minimized by adopting some measures. Many methods of space debris mitigation have been proposed earlier by many space experts, but some of them have limitations in them. After some modification those measures can be proved beneficial in the process of space debris mitigation.
• Some new methods of space debris mitigation we have proposed including: use of decayable material, nanobot and nanotube mesh technique. Moreover, we can also use it for energy generation or the making of space structures.
• We have already polluted our own planet earth; we should now ensure that the space is kept least polluted for our own safe exploration of the outer space and also for the safety of aliens from other planets if they happen to exist.

Recycling of Space Debris

• The general idea of making space structures by recycling space debris is to capture the aluminum of the upper stages, melt it, and form it into new aluminum structures, perhaps by coating the inside of inflatable balloons, to make very large structures of thin aluminum shells.

EFFECT OF SPACE DEBRIS ON THE OPERATION OF SPACE SYSTEM

• A. Effect of large debris
• Large debris refers to objects larger than 10 cm in size. Such objects lead to catastrophic collisions with space shuttles and spacecraft etc.
• B. Effect of small debris
• Small debris refers to objects smaller than a few millimeters in diameter which have already caused some damage to operational space systems. These impacts have had no known effect on mission success.
• There are some examples of damage that affect the surface of operational systems:
• a. Damage to shuttle windows.
• b. Damage to HST high gain antenna.
• c. Severing of the Small Expendable Deployed System-2 (SEDS-2) tether.
• c. Damage to other exposed shuttle surfaces [10].
• C. Effects of space debris on human space operations
• In order to protect crews from debris during flight, operational procedures have been adopted. In the case of the Space Shuttle, the orbiter is often oriented during flight, with the tail pointed in the direction of the velocity vector. This flight orientation was adopted to protect the crew and sensitive orbiter systems from damage caused by collisions with small debris [10].

U.S. government estimates say the 2007 test led to 3,400 pieces of debris, more than half of which is expected to still be in orbit in 2027.

Now, China takes “space debris very seriously” and U.S. State Department officials have been encouraged that China’s recent anti-satellite tests have not created debris. At the same time, in recent years, the Air Force has provided China thousands of collision alert, warning that debris from the 2007 test was nearing their satellites. - See more at: http://spacenews.com/u-s-china-will-meet-this-year-to-talk-space-debris/#sthash.fkzHkNB4.dpuf

http://spacenews.com/u-s-china-will-meet-this-year-to-talk-space-debris/#sthash.fkzHkNB4.dpuf