The consequences of atomic bombings of Japan are far-reaching and have mostly long-term effects. The first option offered is a long-term effect, since it takes at least a few years or decades for the occurrence of mental illness in future generations. A sudden increase in and development of leukemia can occur in the short term, especially due to radiation, but overall the consequences are seen as long-term, as their appearance and development does not stop soon after the bombing, on the contrary, continues through generations. Increased ability for future generations to have birth defects is also a long-term consequence, as it relates to future generations, does not end in a few years.
The only short-term consequence is the inability to undergo X rays, because of the amount of radiation that already exists in the human body.
The gravity of the Sun keeps the planets in their orbits. They stay in their orbits because there is no other force in the Solar System which can stop them.