The potential for contamination of other planets is a primary ethical concern because it could lead to the extinction of life on those planets.

The principle of non-maleficence in the context of space exploration is the duty to do no harm to other celestial bodies. This means that we should take all necessary precautions to avoid contaminating other planets or moons with Earth life.

The principle of justice in the context of space exploration is the duty to share the benefits of space exploration with all humankind. This means that we should make sure that all countries and peoples have access to the knowledge and resources that are gained from space exploration.

The principle of sustainability in the context of space exploration is the duty to use space resources in a way that does not harm the environment. This means that we should avoid polluting space with our activities and that we should use space resources in a way that does not damage the natural beauty of space.

The principle of precaution in the context of space exploration is the duty to take all necessary precautions to avoid contaminating other planets or moons with Earth life. This means that we should take all possible steps to prevent the spread of Earth life to other planets or moons, even if we are not sure that it will cause harm.

The privatization of space exploration raises a number of ethical issues, including the potential for increased inequality between countries, the risk of environmental damage, and the lack of accountability of private companies.

The militarization of space raises a number of ethical issues, including the increased risk of conflict between countries, the potential for space weapons to be used against Earth, and the diversion of resources from peaceful space exploration.

The search for extraterrestrial life raises a number of ethical issues, including the potential for contamination of other planets or moons with Earth life, the risk of harm to extraterrestrial life, and the duty to share the discovery of extraterrestrial life with all humankind.

The possibility of human colonization of other planets raises a number of ethical issues, including the potential for environmental damage, the risk of conflict between human colonists and indigenous extraterrestrial life, and the duty to protect the rights of future generations of human colonists.

The possibility of terraforming other planets raises a number of ethical issues, including the potential for environmental damage, the risk of harm to indigenous extraterrestrial life, and the duty to preserve the natural beauty of space.

The possibility of mining resources from other planets or moons raises a number of ethical issues, including the potential for environmental damage, the risk of conflict between countries over access to resources, and the duty to share the benefits of space mining with all humankind.

The possibility of space tourism raises a number of ethical issues, including the potential for environmental damage, the risk of harm to tourists, and the duty to share the benefits of space tourism with all humankind.

The possibility of space advertising raises a number of ethical issues, including the potential for environmental damage, the risk of harm to human health, and the duty to preserve the natural beauty of space.

The possibility of space warfare raises a number of ethical issues, including the potential for environmental damage, the risk of harm to human life, and the duty to preserve the natural beauty of space.

The possibility of space piracy raises a number of ethical issues, including the potential for environmental damage, the risk of harm to human life, and the duty to preserve the natural beauty of space.