What would happen if iron hit the sun?

As long as there’s still viable fuel at the core of the star, and adequate temperatures and pressures, it’ll continue fusing and releasing energy. If you could swap out the hydrogen in the Sun with a core of iron, you would indeed kill it dead, or any star for that matter. It wouldn’t explode, though.

What would happen if a planet hit Jupiter?

In both cases the explosion on impact will make Jupiter briefly glow brighter than the sun, and a significant portion of Jupiter’s outer atmosphere layers will be blown into space. This material, which consists more of pieces of Jupiter than peices of earth, will form a ring around the planet.

What would happen if 2 planets collided?

If the cores collide at an angle then the planets may or may not merge, but in all cases a large amount of the gaseous envelope will be lost. Very oblique collisions do not disrupt the planets at all and both would continue on almost the same orbits without losing any mass.

What would happen if Jupiter spread its mass to the Sun?

At one other extreme, if Jupiter does not spread at all, it can at most blot out around .3 \% of the sun’s luminosity (as that is the fraction it would cover). They also mention that the mass would make the sun last longer, which is suspect, since extra mass typically reduces the lifetime of main sequence stars.

Is Jupiter about to be ripped apart?

But the average densities of the Sun and Jupiter are almost identical. So it seems likely that Jupiter would be starting to be tidally ripped apart, but as it is travelling towards the Sun at a few hundred km/s at this point, tidal breakup could not be achieved before it had disappeared below the surface.

What would happen to the sun if a planet hit it?

If the planet somehow survived and punched its way to the centre of the Sun, then much less energy would be deposited in the convection zone and the effects would be lessened. On longer timescales the Sun would settle back down to the main sequence, with a radius and luminosity only slightly bigger than it was before.

What is the kinetic energy of Jupiter at the sun’s surface?

The kinetic energy of Jupiter at the Sun’s surface would be of order G M ⊙ M J u p / R ⊙ ∼ 4 × 10 38 joules. The solar luminosity is 3.83 × 10 26 J / s. The addition of this much energy (if it is allowed to thermalise) would potentially affect the luminosity of the Sun for timescales of tens of thousands of years.