What makes a planet inhabitable?

Answer 1

the reason the planet earth is habitable are:

its location in the solar system (in the 'goldilocks zone' where water is liquid)

its size

its tilt on its axis

the presence of water.

Answer 2

Estimates vary but a current list of these factors would list at least 20 including: an oxygen rich atmosphere, liquid water and large continental land masses ,a home star of the right temperature and mass, an orbital path that is neither to far or to close to the home star, a moon large enough to stabilise the tilt of the planets axis and the movement of its tides, a magentic feild strong enough to deflect the suns radiation, a position in the relatively narrow habitable region of a spiral galaxy.

Answer 3

Each planet needs 4 basic things to be livable

• Oxygen
• Liquid Water
• Livable Temperatures
• Livable air pressure

Oxygen - about 15% of dry air

Liquid Water - self explanatory

Temperatures - not sure

Air Pressure - between 950 and 1100 millibars (Guessing)

Answer 4

The conditions of a inhabitable planet varies from species to species, but for most of the species (excluding bacterium and other species that don't need some of the necessities that animals do) on Earth, an inhabitable planet must have water and an abundant food supply. If the planet does not have water, humans cannot live on the planet, and nothing can live without some energy source. If the planet has water, but not nutrients, for example if it's a gas planet with Hydrogen and Oxygen molecules that could combine to make water, but it lacks the nutrients needed for plants and other organisms, it is impossible to say that the planet is inhabitable. As far as scientists know, Earth is the only inhabitable planet.

Answer 5

oxygen and water