Have u ever realized the fact that we are constantly sending satellites to the space year after year from a few decades now and whats happening to it after it has completed its mission???
It is an alarming incident happening in the outer space these days that the junk of the satellites left over after being used up is creating a circumstance known as "Kessler Syndrome". Yes guys it is for your notice that in future if this kin of a thing continues then it might happen that all the research works related to space and travel would be jammed. NASA recently observed this phenomenon occuring in the low-Earth orbit. Moreover the sun flares coming out are to some extent responsible for this blockage too.
So do you think the researchers are sleeping hearing this problem. Absolutely NO. The scientist at NASA have launched a program named "NASA Orbital Debris Program" to get out of such situations. According to the latest report produced by them the Sun can act as help to us clearing those scrubs working as vacuum cleaner.
Another way is the brilliance of mankind and the process goes as follows
Spacecraft sent to other planets -- such as the Mars satellites -- use this high altitude atmospheric drag to slow them down just before orbital insertion, a maneuver called "aerobreaking."
As the debris slows, Earth's gravity pulls it to lower altitudes where the atmosphere is even thicker. Thicker atmosphere = more drag = slower debris. Eventually the debris reenters the atmosphere sooner than it would do without the solar influence, burning up safely (for the most part).
Of the 3,218 cataloged debris from the Fengyun-1C destruction, only 6 percent of the pieces have reentered the atmosphere. But half of those pieces came down in the last 12 months, highlighting the part increased solar activity had to play in removing the debris from orbit.
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