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Why wouldn't the world have advanced warning of a significant asteroid/comet strike?

Assuming this is in the current Earth scenario, there are a few possibilities I can see and it depends on how much time you wanna give to the population: Decades: it is a very bad luck scenario of a ...
Gio's user avatar
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Why wouldn't the world have advanced warning of a significant asteroid/comet strike?

Starlink. Actually, more generally, the clouds of satellites we are putting in orbit these days. They're a royal pain for the astronomers and will make it harder to detect rocks. A bit of bad luck ...
Loren Pechtel's user avatar
1 vote

Why wouldn't the world have advanced warning of a significant asteroid/comet strike?

The object had a near-miss with the moon, and was pulled on to either a very different trajectory, or had been predicted to hit the moon, and didn't, again ending up on an Earth-intercepting ...
MikeB's user avatar
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2 votes

Why wouldn't the world have advanced warning of a significant asteroid/comet strike?

We Were Getting Our Rocks Off In a near future where humanity is experimenting with moving meteor fragments or high albedo debris around via drone "tugboats", we may end up cluttering up the ...
nullpointer's user avatar
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1 vote

Why wouldn't the world have advanced warning of a significant asteroid/comet strike?

Simple: You're looking for a needle in a haystack. How much stuff is in the sky in your solar system? Few objects? Easy to track and spot... Many? harder to spot. Many upon many? harder and harder to ...
WernerCD's user avatar
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1 vote

Asteroid--earth as a bull's eye

You appear to be correct. We simply do not have the tech to deflect an asteroid of that size. While nukes are a popular option to do this, it's important to keep in mind that they only go suborbital. ...
Bubbles's user avatar
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3 votes

Why wouldn't the world have advanced warning of a significant asteroid/comet strike?

This might seem simple, but it does explain the "Why did we not notice this ?" The asteroid is moving significantly faster than usual. (Maybe it's naturally accelerated, maybe it isn't, ...
Or4ng3h4t's user avatar
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9 votes

Why wouldn't the world have advanced warning of a significant asteroid/comet strike?

Really bad luck Estimates show that an asteroid in excess of 1 kilometer in diameter impacting Earth would be a civilization-kill event. While we have found over 90% of near earth 1-kilometer ...
Bubbles's user avatar
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15 votes

Why wouldn't the world have advanced warning of a significant asteroid/comet strike?

It could be an extra-solar object like 'Oumuamua. That would explain why it hadn't previously been detected. A sky survey might pick it up, but since it's heading almost directly towards us on a ...
N. Virgo's user avatar
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0 votes

Why wouldn't the world have advanced warning of a significant asteroid/comet strike?

There is a lot of research on this just now. Almost all money spent on space is wasted. We are not going to New Worlds, and bring back gold, tobacco, and slaves. However, spotting an earth-hitting ...
Richard Kirk's user avatar
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7 votes

Why wouldn't the world have advanced warning of a significant asteroid/comet strike?

Maybe it doesn't orbit; it's an interstellar object that strikes the Earth on the way through. We had our first recorded passage through the solar system of an interstellar object recently: https://en....
Robertiton's user avatar
21 votes

Why wouldn't the world have advanced warning of a significant asteroid/comet strike?

So a counterpoint to your view. The world thinks there is no warning system, not because it doesn't exist, but because the world has no way to respond to this information. A world ending meteorite ...
Flotolk's user avatar
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18 votes

Why wouldn't the world have advanced warning of a significant asteroid/comet strike?

The Asteroid was caused by the collision of 2 other asteroids that were not anticipated to hit earth So, there are two asteroids flying on a merry orbit, close-ish (in astronomical terms) to earth - ...
TheDemonLord's user avatar
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29 votes
Accepted

Why wouldn't the world have advanced warning of a significant asteroid/comet strike?

The near-Earth objects we look for are mostly in the plane of the ecliptic, because that is where the vast majority of solar system material not in the Sun is to be found. The object that is about to ...
SoronelHaetir's user avatar
1 vote

Asteroid--earth as a bull's eye

Not in 4 weeks The math is pretty simple. The Asteroid will hit in 4 weeks, 2419200 seconds. Earth has a radius of approximately 6000000 meters. We wish to move the rock by 6000000 meters over 2419200 ...
ErikHall's user avatar
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2 votes
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Asteroid--earth as a bull's eye

Maybe, too much depends on the asteroid's actual size Okay let's do some maths. First, if an asteroid on collision course is detected 4 weeks prior, you can only hit it with Earth-located missiles (...
Vesper's user avatar
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