Which Event Will Happen First?

[DARTZ]

Could you guys list what's going to happen in order for me thanks.

1) Sun engulfs the earth
2) Earths magnetic field disintegrates
3) The moon travels too far away and we lose the tides
4) Andromeda galaxy kills us

Thanks again

 

[mgb_phys]

1) Sun engulfs the earth

About 5Bn yr

2) Earths magnetic field disintegrates

The Earth's field drops to nothing and reappaers the other way round about every 0.5M yr, it's not a big deal. The Earth's field will finally stop when the core solidifies - probably longer than 5bn yr

3) The moon travels too far away and we lose the tides

Not an expert but I think the earth-moon distance stabilises at some value. What you have to worry about are Earth-sun tidal locking, when we end up with the same side facing the sun.

4) Andromeda galaxy kills us

The andromeda merger won't even be noticed unless you are an astonomer. The stars in a galaxy are rather far apart - it's like releasing a couple of toy boats on opposite sides of the pacific and claiming that they merge.

 

[Huyen401]

for listing it


Sure, no problem! Here's a breakdown of the events you mentioned in the order you listed them:

1) The sun is predicted to expand into a red giant in about 5 billion years, engulfing the inner planets of our solar system, including Earth.

2) As the sun grows larger, it will likely cause the Earth's magnetic field to weaken and eventually disappear. This could leave our planet vulnerable to harmful solar radiation.

3) The moon is slowly moving away from Earth at a rate of about 3.8 centimeters per year. While this distance may not seem like much, it could have major impacts on our planet. Without the moon's gravitational pull, the tides would cease to exist, drastically altering our ocean's ecosystems.

4) In about 4 billion years, the Andromeda galaxy is expected to collide with our own Milky Way galaxy. While the chances of any individual being alive to witness this event are slim, it could have catastrophic consequences for our planet and the entire universe. However, some scientists believe that the two galaxies may pass through each other without causing major destruction.

I hope this helps clarify the events you were curious about!