I have a couple questions about the volcano on Earth's moon. (Please read for the actual questions)?

Question

I found an article in the Times UK edition about the discovery of a volcano on the moon.
http://www.timesonline.co.uk/article/0,,...
1. How do these eruptions behave with no atmosphere?
2. Would these previous eruptions affect the orbit of the moon? Would there be a wobble?

Answer 1

The last time I read anything about volcanos on Earth's Moon they were the result of internal melting caused by meteor strikes. Dispite the apparent smallness of the Moon as seen from Earth it is a very large object and has been refered to as Earth's "dead" twin.
For a Volcano to affect the orbit of any object, moon or planet, it would have to be very big. The largest known volcano in our solor system is Olympus Mons on Mars. It has apparently erupted with enough violence in the past to eject rock into space. At least that is the theory proposed by those who believe they have found pieses of Martian Ejecta on the South Pole of Earth. That didn't do anything to the orbit of Mars. Moons and planets have so much mass that jogging them from their orbits would take more energy than even a Volcano could muster I think.

As for how the eruptions would behave with no atmosphere, there would be no wind to blow the ejecta away from the point of origin so the ejected particals would just continue on in thier original trajectory until the gravity of the moon in question was able to pull them back down. I'd guess that this would make the 'cone' of the volcano be fairly even. The gases from the eruption that were not trapped inside the more quickly cooled molten rock would escape into space.

Sorry about any mis-spelling. I couldn't get the spell check to work.

Answer 2

A volcano doesn't need an atmosphere to erupt. All it needs is a molten mantle and sufficient pressure. All an atmosphere does is provide a means of global transprtation for the particles, until gravity pulls them back down to the surface.

Answer 3

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Answer 4

when there is no air , then the prarticles ejected by explosion r thrown into empty space where it can travel any where.
NO,previous eruptions can't wobble the orbit but large mass can cause instantaneous effect on the orbit.

Answer 5

There are no active volcanoes on our moon, there are however active volcanoes on various moons of other planets.