[Darksheare]

Orbital mechanics.
That’s why.
It isn’t heading our way at all.
Cometary debris streams follow defined paths.
That is how meteor showers are predicted and defined.
The debris streams tend to stay in predictable locations.
Right now we are entering two streams, quadrantids and geminids.

[Yosemitest]

How wide was the "V" pattern of Ison as it left the Sun?
What makes you think that

once those pieces of Ison came apart into that "V" pattern,
that they will suddenly change direction again, and follow the original course or parallel it?

I ask again,

"What is the impact energy of a piece traveling well over 300,000 miles per hour? "

[Talisker]

Orbital mechanics.
That’s why.
It isn’t heading our way at all.
Cometary debris streams follow defined paths.
That is how meteor showers are predicted and defined.
The debris streams tend to stay in predictable locations.
Right now we are entering two streams, quadrantids and geminids.

Well ISON is supposed to pass directly over the North Pole, 41 million miles straight up.

And the last pictures of it show a debris trail twice the width of the sun, so about 1.5 million miles.

But ISON still has 80 million miles to go to reach us, and the 1.5 million mile debris trail is expanding like a shotgun blast.

So the big question is, how wide will it spread?

[Justa]

This thing is above the orbital plane and moving away. Yet some netizens still find reason to worry about it.

Reminds me of when my son was 2 y.o. whenever he heard the horn from a nearby train at night he was convinced the train was coming into the house. It took six months to convince him otherwise.