When the Sun reaches its second stage in its life cycle why will the Earths axis change?

Question

i was wondering if there was a valid answer to this question

Answer 1

A star's life isn't like a human's. We get weaker and weaker. The sun is like a balloon. IT gets bigger and bigger and bigger.......... The POW! It explodes. If it gets bigger, it gets stronger. So does it's gravity. So, Earth's axis will change mainly because of gravitational changes.

Answer 2

there is no valid answer, bcuz the earth's axis will not chance.

have you been reading pseudoscientific c**p again?

Answer 3

If you tell me what you think the second stage of the sun's life is I might be able to give you an answer.

After the sun has exhausted its core hydrogen it becomes a red giant.

Then is becomes a yellow subgiant while it fuses helium in its core. When the helium runs out it becomes a redgiant again.

During this phase (Asymptotic Giant branch phase) the earth will probably get swallowed by the sun!

But if it doesnt...

The sun loses about 40% of its mass, so the balance of gravitational forces acting on the earth from the sun and the moon will change.

However - the earth's axis is moving all the time:

The axis of the earth does wobble on several known timescales. These wobbles are known as the Milankovic cycles.

See: http://en.wikipedia.org/wiki/Milankovic_...

Basically the axis of the earth’s rotation does not always point to Polaris (the Pole Star); and we are not always inclined at 23.5 deg. So the poles do move relative to the plane of the earth’s orbit around the sun, and relative to the stars – but the shifts are minor.

Answer 4

For the Earth's axis to change, there would have to be a force emanating from the Sun acting on only one part of the Earth. I cannot fathom out any physical reason how this could happen.

Answer 5

I have not yet found a theory proposing this effect on Earths axis. Can you elaborate this a bit better? Why should it?

Earth has a huge rotational moment and requires lot's of energy to be forced to rotate different. Even a huge Earthquake is not able to make a day last longer than a nanosecond.

Answer 6

The changes in the Earth's axis have little to do with the Sun.  They result primarily from gravitational interactions with the other planets.