I have never in my life heard that the Earth will fall into the sun. What I have heard repeatedly is that the Earth will remain in orbit as the sun starts to expand at the end of its natural life and becomes a Red Giant. The sun will expand past the orbit of the Earth and effectively "consume" the Earth and the other inner planets. So where are you getting your comment from?
yes, I said that. OUR sun won't last long enough for the earth to fall into it. But the law's of gravity say that it will eventually do so.
Our sun will "die" before that happens, long long before...
gravitational orbits always decay. that's why our satellites need boosters to keep them in the right place.
the distances and velocities of the planets, moons, asteroids around our sun lend to very long orbital decay times.
all this data is available for one that seeks it, I would start with NASA or any one of the National Observatory Telescope museums scattered around the country. They like to collect that stuff.
"if the sun were not to run out of fuel and expand", they can calculate the exact date each of the planets will fall into the firery reactor, starting with Mercury.
Likewise, the stuff you are saying about atoms is something that I have never heard in my life. There is no such thing as "charge weakening" in an atom. "Half life" has nothing to do with what you are attributing it to. Where is this coming from?
its not called "charge weakening",... the nucleic charge weakens.
its the same process of orbital decay, but the electron is moving at nearly the speed of light.
they don't "fall into" the atom, When energy is exchanged between the nucleus and electron
the nucleus always loses out. electrons are replenished/replaced freely from the environment.
the nucleus is isolated from energy going in, only out.
you can watch a single atom over trillions of orbits without ever observing it decay into a lower state.
or it could decay before you can focus the microscope on the image of the atom you wish to observe.....
what "half life" means, is that in a given sample of a particular species of atom,
sometimes billions of atoms...
approx. half of them will have decayed into a lower state after x amount of time.
its' an average value based of many observations
we cannot know the particular energetic state of every individual atom, only the ones we observe.
furthermore, the method of observation changes the very value of the data we are attempting to obtain.
once we know the state of an atom, we can calculate each of its orbits' from now until the end of eternity
(at least that's what it feels like after countless hours and gallons of coffee at the local IHOP)
and determine precisely when the electron's orbit will no longer be stable
within a certain % of events unknown to us that may alter that future path.
the electron almost always maintains a similar "value" of energy or charge at its stable low energy state
it's not even the same electron the atom started with, they often switch places many times through an atom's life.
it is bound to atom by the opposing nucleic charge, which is not replenished by the environment.
so this charge decreases over time, due to energetic exchanges between the electron and nucleus
until the forces holding it together become unstable.
the nucleus may then lose a proton, neutron or lower energy particle.
it is the reverse process of fusion, eventually everything will revert back to the base elements.
even the most radioactive of substances
until all energy/heat/mass/radiation is evenly dispersed across the universe in a thin motionless film of dust.......