We may ask ourselves, what stays in the air forever?  The clouds,sun, moon and the stars. Although, the sky is really just an opening at the top of the earths atmosphere. It's opening allows things to travel through it like birds, rain, airplanes, helicopters and people.  In many instances people are not associated with sky dwelling. As a result, such dangers that exist within the sky are not taken too serious regarding human occupants.

A German satellite called ROSAT was launched into the air by the Germans more than tewnty years ago.  Most of the satellite since that time has landed or arrived on earth without much hysteria.  However, there seems to be a part of the  ROSAT satellite that is now finding its way to landing on the earths surface. The problem here is that the satelite part or piece has become difficult to track. No technology in specific, exists to determine it's exact whereabout and speed and estimated time of arrival.  When unable to have information regarding the ROSAT patricle descending upon earth it is difficult to determine when and where this particle will land.

Article VII of the outer space treaty of 1967 states that each state party to the treaty that launches an object into outer space, including to the moon and other celestial bodies, and each state party from whose territory or facility has an object  launched, is internationally liable for damage to another state party to the treaty or to its national or juridicial persons by such object or its component parts on earth; in air space or in outer space, including: the moon and other celestial bodies.
This would mean that if an object is launched into outer space from any country, which includes America and if any or part of that object lands and inflicts damage to anyone or thing then that country is responsible for the damage.

Question

Should planes and other air carriers be equipped with object tracking devices that can inform them if and when a foreign object is approaching them in the air; by indicating an alert and providing a description of the object so that people and other cargo will be spared from harm by resulting from the air carrier traveling out of the direction of danger?

Answer

Yes, among other things. Since air carriers are in the air or high enough to probably be able to get the signal of an object traveling towards earth such as an old part of a German satellite. This can be very useful. Air tower control monitors things like all of the flights in the air, commercial and private. But they may not be equipped with the necessary technology that can inform them when objects of danger are traveling in the air, in that these objects cannot be signaled to stop or given direction to travel away from danger. What would be ideal for future use is if shuttle and other outer space designers and builders could design such space travel apparatus to eventually disintegrate into dissolveable matter.  This would mean that a space shuttle is composed of elements that will disintegrate and dissolve when broken apart and among space for long periods of time. This should be a requirement of space shuttles in the future.  Meat,poultry, dairy and fruit products ect. will become spoiled if left out for long peroids of time. This is due to the environment and the ability to withstand temperatures without being stored properly. Space shuttles can be composed the same way in that once a particle is no longer attached to the shuttle or enclosed in some way, the material exposed to the earths elements will begin to dissolve or rot away. This process of dissolving will occur as the shuttles particle exists in space and will have completely dissolved before it is able to arrive on earth in any country at a weight and speed of definite harm.

Sure, there are satellite tracking devices for example used to monitor weather conditions that may be able to locate an object of earthy disturbance.  But, there needs to be devices on air carriers that will be of immediate use and reference in determining object intereference so the disaster with such collision can be avoided. This needs to be done until those that handle voyages to space are able to program any part of a shuttle built with microchips, that can endure such pressure while in space and tolerate combustion when blown apart. This is so that when these bits of shuttle odds and ends go floating around the sky for others to intercept, the space team in charge of a voyage can just radio in and have these shuttle parts flock by command safely and orderly back to their appropriate country of space administration.  Such a rock on earth would be too big for ones hand. At least Article VII let's us point a finger!