Tunguska!

[alexander]

meteor showers are different, a bit, well the planet's rotation is the defining factor there, just-so-happens that we rotate at a very similar speed, and on a given day, throughout last milleniah, we have been in the same general area of proximity with the sun and the meteorite belt in proximity to the sun. The shower may very well be a cloud of debris that we hit with each rotation, pulling some into the atmosphere, making it a meteorite shower on a periodical basis. as i said, as far as large objects hitting the planet, this is highly unlikely to be periodical...

[Moontanman]

Originally Posted by alexander

meteor showers are different, a bit, well the planet's rotation is the defining factor there, just-so-happens that we rotate at a very similar speed, and on a given day, throughout last milleniah, we have been in the same general area of proximity with the sun and the meteorite belt in proximity to the sun. The shower may very well be a cloud of debris that we hit with each rotation, pulling some into the atmosphere, making it a meteorite shower on a periodical basis. as i said, as far as large objects hitting the planet, this is highly unlikely to be periodical...

Not true dude, most meteors are associated with trails left by comets slowly breaking up as they orbit the Sun. That's why we get predictable meteor showers. Has nothing to do with the rotation of the earth and everything to do with it's orbit. While most of the cometary debris are tiny pebbles some are large chunks, small rocks, and even large chunks of ice. That's why the the Tunguska blast is associated with a meteor shower. The blast happened at the peak of a well known meteor shower. Having said that it is true that all large meteors are not necessarily associated with meteor showers but they can be and often are.

[alexander]

I therefore must be thinking about earlier universe....

Agreed that it's not likely to be due to the asteroid-space debris field, but you can not say that the rotation of the planet has nothing to do with timing, because it has as much to do with it as the orbit and period of the earth as the orbit and period of the comet.

Originally Posted by moon

Having said that it is true that all large meteors are not necessarily associated with meteor showers but they can be and often are.

I think that you have it the wrong way around, and do correct me, as i am not well versed in astronomy.

From what i gather, about 86% of the debris that hits earth atmosphere are chondrite meteorites.

Originally Posted by wiki article

Chondrites are typically about 4.55 billion years old and are thought to represent material from the asteroid belt that never formed into large bodies.

Though i guess they could be toed behind a comet if the comet passed through the belt....

And i think its the other way around due to the formation of the chrondrule particles.

Originally Posted by wiki article

These particles, or chondrules, are composed mostly of silicate minerals that appear to have been melted while they were free-floating objects in space.

Tunguska blast may be associated with a meteor shower, that still does not mean that it could not be a comet....

[alexander]

or for that matter that another one would hit us 100 years after that...

[modest]

Originally Posted by Moontanman

The blast happened at the peak of a well known meteor shower.

Does the link name the comet?

~modest

[Moontanman]

I therefore must be thinking about earlier universe....

Agreed that it's not likely to be due to the asteroid-space debris field, but you can not say that the rotation of the planet has nothing to do with timing, because it has as much to do with it as the orbit and period of the earth as the orbit and period of the comet.

The rotation of the Earth would have no effect on meteor showers, why would you think it would? The orbit of the Earth and the comet and or debris field would have everything to do with a meteor shower. I am not talking about the local time the shower occurs but the days or weeks of the year the shower occurs. Most if not all showers last at least several days with the peak occurring on a specific day. The reason the time is often given as a certain hour has more to do with when the peak will occur over a certain area of the earth suitable for viewing. Meteors hit during the day as well as night but are more visible in the early morning due to the direction of the earths orbital motion not because of the earths rotation.

I think that you have it the wrong way around, and do correct me, as i am not well versed in astronomy.

From what i gather, about 86% of the debris that hits earth atmosphere are chondrite meteorites.

Though i guess they could be toed behind a comet if the comet passed through the belt....

And i think its the other way around due to the formation of the chrondrule particles.

Tunguska blast may be associated with a meteor shower, that still does not mean that it could not be a comet....

Meteors hit the earth 24/7/365 the average may well be chondrites but the predictable showers are often associated with known cometary orbits. Showers not associated with known comets are often assumed to be part of old comets that have disintegrated, the Tunguska event was at the peak of the

Beta Taurids - Wikipedia, the free encyclopedia
Associated with the
Comet Encke - Wikipedia, the free encyclopedia

[alexander]

Originally Posted by moon

The orbit of the Earth and the comet and or debris field would have everything to do with a meteor shower.

perhaps i didnt word it correctl, but that's exactly what i've been saying, or at least trying....

hmm, i thought they have ran simulations and got a similar kind of tree-uprooting patterns as was observed and documented by the earliest expeditions there...?

[Moontanman]

Originally Posted by alexander

I therefore must be thinking about earlier universe....

Agreed that it's not likely to be due to the asteroid-space debris field, but you can not say that the rotation of the planet has nothing to do with timing, because it has as much to do with it as the orbit and period of the earth as the orbit and period of the comet.


I think that you have it the wrong way around, and do correct me, as i am not well versed in astronomy.

From what i gather, about 86% of the debris that hits earth atmosphere are chondrite meteorites.

Though i guess they could be toed behind a comet if the comet passed through the belt....

And i think its the other way around due to the formation of the chrondrule particles.

Tunguska blast may be associated with a meteor shower, that still does not mean that it could not be a comet....

Originally Posted by alexander

perhaps i didnt word it correctl, but that's exactly what i've been saying, or at least trying....

hmm, i thought they have ran simulations and got a similar kind of tree-uprooting patterns as was observed and documented by the earliest expeditions there...?

Yup they did, aerial burst like a multimegaton air burst, obviously we had our communication wires crossed

[modest]

Originally Posted by Moontanman

Yup they did, aerial burst like a multimegaton air burst, obviously we had our communication wires crossed

The first person to notice the similarity between the upright trees striped of their branches at Tunguska and Hiroshima was a soviet Alexander Kazantsev. He featured it in a science fiction story. He assumed meteors only exploded when hitting the ground and came to the conclusion it must have been an alien craft whose nuclear reactor exploded off the ground.

Democratic Central:: June 30, 1908 -- Tunguska explosion occurs

~modest