How bright our vision is out of the world? Could we see easily

>>9146100
Yeah there are a tremendous number of people looking up with telescopes and instruments and they can and do track shit like broken rivets from long ago orbital missions.

Probably a zero percent chance of a asteroid coming toward earth unnoticed.

Unless it was moving at relavistic speed was very small and approached perpendicular to the solar plane.

>>9146100
>How bright our vision is out of the world?
Given there are true flat-Earthers, I'd say not very bright.

>Could we see easily every object in the space which is getting close to the Earth?
You'd have to define "easily" and "close," and do you really mean *every* object?
Certainly not every object. Go out and watch a meteor shower. None of those are predicted (except the shower as a whole, and that's because the showers are periodic).

>Can a celestial object(meteor or something else) hit the Earth suprisingly?
Absolutely, yes. Remember a few years back, Chebaylnsklhdfnasf whatever?

Here's a shocker for you: Go to Ron Baalke's Space Calendar at JPL.
www2.jpl.nasa.gov/calendar
Do a Ctrl-F on "roid 2017" Those are asteroids that were *discovered* in 2017. Then take a look at closest approach. If they get closer than 0.000x AU, that's pretty close.
And there's no guarantee that we'd see an interloper coming in from having passed by the Sun.

>>9146100
If the object happens to pass by from the inner solar system (which means it approaches from the sun-side of the planet) it is very hard to see because the sunlit side of the object is facing away from us.

Objects approaching from beyond earth orbit have the sunlit side facing us so they are much easier to see, however space is still very very big and the objects are very small so they can be extremely hard to find until they get pretty close.

>>9146100
>Could we see easily every object in the space which is getting close to the Earth?
no
you need to locate them and keep tabs on them. In the future we'll need more dedication, funding and automation to do this adequately. At the moment we keep tabs on most of the big fucks but little else. There are so many celestial bodies, small meteoroids and asteroids regularly hit earth. There are plenty that are large enough to cause significant damage to us, that we are not tracking.