If Polaris was twice as far away as it is, it would be three-quarters dimmer, but still quite useful. If it was a few thousand miles away, the Earth would be well inside it.
It won't. Both Jupiter and Earth are in stable orbits, and there is no reason for that to change. In any event, Jupiter is thousands of times the size of Earth, so it would be more correct to say that Earth would crash into Jupiter. Again, this is extremely improbable.
Earth.
it change the earth atmosphere when magma flashes out then the earth surface will be dusty
It is possible for comets and asteroids to hit Earth, but they are extremely rare events.
15 feet couple.....thousand....miles
No, not currently. The continents won't change for hundreds of millions of years as they move extremely slowly.
Mass does not change with changes in altitude or elevation. Weight on the other hand does change. However, on earth the change from sea level to the top of a mountain would be extremely small.
Yes constantly, it is affected by the Solar wind and about every 100 thousand years the poles flip.
We live on Earth.
the outercore is extremely hot
25 thousand
No gravity cannot change so that it no longer pulls us towards the earth because it is a property of the earth itself. The force of gravity exists between any two masses, even two people, but is much more profound between the earth and us due to the extremely large mass of the earth. Unless the mass of the earth changes, the force of gravity cannot change.
It won't. Both Jupiter and Earth are in stable orbits, and there is no reason for that to change. In any event, Jupiter is thousands of times the size of Earth, so it would be more correct to say that Earth would crash into Jupiter. Again, this is extremely improbable.
Earth.
No!!! Extremely hot
Since oxygen is found as a gas here on Earth, it would have to be extremely cold for it to change into a liquid form. So in all but a very rare case, no.
All tilts are stable - they change extremely slowly ... over many thousands of years. (And the water does float - on the rock (of the mantle).