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Legend2440 2 hours ago

No they don't. It's more of an issue for long-exposure galaxies and nebula.

And asteroids are an extremely rare threat in the first place. It's literally a once-in-a-million-years kind of event.

croes an hour ago | parent [-]

Dinosaur killers? Yes.

City killers? That size hits more often

> Asteroids with a diameter more than 30–50 metres (100–150ft) are large enough to make it through our atmosphere intact, however, and the chance of this happening is estimated to be around once in every 100 years.

> The damage from an impact of this size would be wide-ranging, and could wipe out an entire city if they were to impact a heavily populated area.

https://www.skyatnightmagazine.com/space-science/chances-ast...

Legend2440 an hour ago | parent [-]

We lack the technology to detect this size of asteroid with enough time to do anything about it.

Luckily, the majority of the earth's surface is unpopulated. Most of these rocks hit the ocean or Siberia and cause few or no casualties. The odds of it hitting a major city are quite low.