It is extremely unlikely that a neutron star (or any star or planet) will collide with the Earth, so this is not something that you need to worry about, however, if a neutron star were to collide with the Earth, the Earth would be captured by the intense gravitational field of the neutron star, and would be absorbed by the star. Under sufficient pressure, electrons and protons will merge to form neutrons, and so the atomic matter of which the Earth is composed can be converted into pure neutrons.
It would ruin your whole day. Celestial mechanics makes this a non-existant threat, though, so you are relatively save. The collision of the two planets would destroy all life on earth and create a much larger planet, since the speed of collision would probably not allow for much to reach escape velocity.
we would all obviously die
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Exactly the same as outside, but the debris would travel farther because there is no resistance in the vacuum. Outside the vacuum the explosion would happen instantaneously once the anti-particles collided with oxygen.
The temperature on Earth will become so hot that no living animal, human or plant could survive.
In all probability - not that this scenario would happen - but the resulting combination of masses, would push the combined "stars" over the Chandrasekhar limit and a black hole would form.
Both planets would be destroyed, as the gravitational pull would rip off matter from both planets, and they would be ripped apart.
If a teaspoon of neutron star material were to come into contact with Earth, it would release an immense amount of energy, potentially causing catastrophic damage. The extreme density and gravitational pull of neutron star material would likely result in a powerful explosion upon impact, leading to widespread destruction in the surrounding area.
the particles would split tocreate multiple unstoppable objects
you get freezing rain
if a planet was close to earth it would cause earthquakes and more. if it collided if earth depending on the size if it is big it will collide with earth.
A star 100 times the mass of Jupiter would barely be massive enough to be a star at all. However, the collision would probably be bad for the Earth and us, its inhabitants.
It would be Deuterium, also called Heavy Hydrogen.
Smaller. Something as big as the Earth would have so much gravity that it would probably have collided with something else and been eliminated
The kinetic energy would transfer Ping Pong ball!
People would bump into each other and jostle each other, and hopefully laugh about it.
That would be a collission between two neutron stars. Since many stars are actually double stars, this can happen now and then.