Is it illegal to destroy other planets?
There are no specific laws regarding the destruction of planets. There is the United Nations' Outer Space Treaty, which claims space as the province of all mankind, and not subject to claims by any one nation. Technically, this treaty might suggest that attacking a planet would be an assault on all mankind, but who is going to enforce the claim against somebody who can destroy a planet?
There are, however, treaties concerning the placement of weapons of mass destruction in space. The Outer Space Treaty and the SALT II treaties prohibit placing WMD's on space platforms. They do, however, permit the use of conventional weapons and Kinetic Energy Weapons (KEW's).
A KEW is basically a rock or projectile without a warhead dropped from high orbit that relies on gravity to accelerate it to extremely high speeds, giving them enough energy on impact to explode with the force of a nuclear weapon. A sufficiently large KEW could destroy a planet without much trouble. In fact, it would be a lot cheaper and easier than lofting enough nukes to do the job.
There is no question that the sun will expand and destroy at least the inner planets. How large it will actually get and how many of the other planets it will actually "destroy" is still being kicked around. Certainly the earth - or at least its orbit (because the earth will be burned to nothing by then) - will be engulfed by our expanding and aging sun, but that's billions of years from now.
It is illegal to destroy currency with fraudulent intent. It is also illegal to destroy paper notes with the intent to put them out of circulation. Basically, intent makes the difference between what is legal and illegal in this case; you cannot be convicted of accidentally destroying US currency. http://answers.google.com/answers/threadview/id/77334.html
It would ruin the solar system and might destroy the other planets because they are in the way of the suns orbiting circle and all the planets would be floating in sapce all over the place or the sun and all the other planets will have to orbit the earth and it will become the earth system-dont think it's going to happen though
Like all the planets in the solar system, Mercury has been struck by many asteroids and comets, especially when the solar system was young. Unlike the other rocky planets, though, Mercury has no atmosphere, no volcanoes, and no plate tectonics. On other planets, there features gradually destroy or bury craters. Since Mercury lacks such activity its craters remain preserved for billions of years.