[parker99]

A few words about space junk. This thing became a real issue nowadays.The big number of space junk can damage expensive spacecrafts The growing number of space items can lead to the state where he object density is so high that one collision is enough to generate a cascade effect, leading to further collisions.

[Eternal Student]

Hi @parker99.

  I'm guessing you're new here.  Welcome.  That looks like a perfectly sensible and good first post.
Yes, space junk is a great concern.  Many of the earlier replies in this thread echo your opinion.

Best Wishes. 

[Just thinking (OP)]

I think of statistically it is one of 20k+ objects (even the big one). So a math model would show thousands collisions times for the whole.

Yes, it would be a total loss if too many collisions occur we will have to do a better job at hard wiring the world. I don't know why they haven't placed communication towers across the oceans. This won't cover all of the benefits that satellites bring.

[parker99]

Hi @parker99.

  I'm guessing you're new here.  Welcome.  That looks like a perfectly sensible and good first post.
Yes, space junk is a great concern.  Many of the earlier replies in this thread echo your opinion.

Best Wishes.

Thank you) I am happy to join this forum and discuss some science news. Also, I wanna add a few more words about space debris.There are some missions that will be launched soon in order to deal with the space debris issue.

[TommyJ]

It is in news that Starlink is producing 50% of collisions nowadays.
Having 20k+ junk pieces already on the orbit for all the time, it looks inevitable as a result of Starlink, sending 15k and preparing twice more.
I assume, there must be mitigation points behind:
- Where the collision numbers become critical to hold on new launches.
- Automatic manoeuvring systems continuous calibration.
- Emergency actions for the critical collisions that might happen.
 
Still to have more experience of distinguishing between space junk and meteors, finding the best location for occurrences observation, may be advantageous.

[Just thinking (OP)]

Still to have more experience of distinguishing between space junk and meteors, finding the best location for occurrences observation, may be advantageous.

I enjoy astrophotography and in a few years they say we won't be able to get a photo without a satellite being in it.

[emelymorris]

Space debris is the work of man, it is important to understand that we have created this danger ourselves. This is probably the most significant difference between space debris and asteroids. We will continue to monitor the asteroids, in case of danger we will be able to use technologies, but so far they do not cause more problems than before.
But as for the garbage, not everything is so good, because the problem is getting worse, it only gets bigger. The  spammy.com briefed me on the current situation.
 Now there are more than seven tons of debris in low-earth orbit, although this is not so significant for the scale of space, it already creates emergency situations for the MSC, satellites, and others. There are more and more ideas of technologies that are ready to work on solving this problem, such as a space vacuum cleaner, a laser, even AI.

[Just thinking (OP)]

Space debris is the work of man, it is important to understand that we have created this danger ourselves. This is probably the most significant difference between space debris and asteroids.

Space junk is like sand yes very dangerous but asteroids are like a freight train very very dangerous. Space junk is more a kind to meteors the big difference between meteors and space junk is that space junk orbits and hangs around longer waiting for a victim. All are bad if they meet their target.