Wouldn't it be super dangerous to terraform Mars

How would the sudden destruction of the earth affect other planets in the solar system?

Where the moon would go is obvious and will be answered by others - interesting is how will human colonies deal with the consequences?

Where debris would fly depends on the energy and direction of the fatal blow.

  • With enough energy, rubble would be fly over the entire inner solar system - and the moon will continue near the earth's orbit (which will also be the path of most of the earth's debris) after the first impact. Such debris is a threat to Mars and the Moon (and other asteroid mines), but not to Pluto.
  • With less energy debris fly near the original earth orbit, and with little energy the moon could orbit remnants of the earth and debris would be less dangerous to Mars.

Much of the Debris could build up again on the new earth - it will not be habitable for millions of years, but at least other human colonies would be safe from rubble. If not, we have a new (inner) asteroid belt - some chunks could cool down in a few hundred thousand years to be useful for mining resources like metals. Good source of iron already orbiting - and we are going to need it.

The absence of Earth will not have a major impact on the other planets - the sun's gravity makes the rules.

What Have an impact would be flying debris. The bombardment of human colonies on Mars, and especially the moon, by remains of the earth would be a great danger for centuries. The moon would likely have the most colonies on the earth side - and they would be badly affected by the original explosion.

What about other human colonies?

The survival of the other human colonies would depend on how independent their ecologies are. I suppose it will be quite difficult to grow all food, but food production would obviously have the highest priority. The quality of life on Mars would decrease significantly - but it is better to fight than to be dead. If the moon was just a tourist trap, most or all of the population would starve to death quickly.

Pluto is ready for it must be independent (anyone with nuclear hydroponics?) - so Pluto will most likely survive even if Mars couldn't survive the debris bombardment and damage to its ecology. Any rogue remnants from Earth will take a long time to get to Pluto, and their trajectory could easily be changed to less dangerous. Perhaps it is Pluto who is repopulating the solar system.

If debris formed another asteroid belt, survivors from Pluto and Mars would have an excellent mining base from which to build interstellar spaceships.

Terraforming Mars is a fool thing in my opinion, Mars would lose a new atmosphere for exactly the same reasons it lost old ones, especially with the extremely limited resources on Mars. Of course, it depends on the risk of debris bombing and how close the terraforming is to finishing. If some pieces of frozen earth can safely fall onto Mars, that could Destroying the earth will even accelerate the terraforming of Mars - not sure what plans OP have, it depends on the plot.

Possibly scarce resources on Mars should be better for the construction of underground cities on Mars (protection from bombing of debris) and the Development of interstellar travel .

The most important thing will be to locate some asteroids and move them towards other solar systems: Whatever destroys the earth can return and destroy the rest of the human colonies. You definitely want to out there . This solar system is doomed, dude.

ckersch

In relation to the moon, it orbits the earth at an average speed of about 1 km / s, but orbits the sun at about 30 km / s, so it orbits the sun no matter which direction it is moving than the earth disappeared. The direction it would go would determine how elliptical that orbit would be, but it would get pretty close to Earth's current orbit.

Arad

Mars is the most independent of the colonies at the time this story takes place, but is still heavily dependent on Earth's supplies. Terraformation of Mars itself is not impossible, just very difficult, resource intensive, requires constant maintenance and monitoring, and is expensive as hell. Let's just say some groups of people have seen enough benefits from maintenance to make up for the cost they put into it. Why it happened doesn't matter. Crucially, the process is partially complete, only to suddenly lose most of its supporters and external resources.

PM

You know your story, of course: I just think it should be obvious to humanity not to waste huge resources on terraforming Mars and instead rush to develop interstellar journeys to get out of the doomed solar system. Your world and your preferences, I'm just saying what makes sense to me. I didn't want to limit myself to the moon's trajectory like other answers