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We don't know that it is.
While it certainly seems as if Earth is the only inhabited planet in the solar system, we cannot be entirely certain of this, for two reasons:
1. We're looking for life as we know it, and alien life may be very different.
2. We haven't looked very much: A half-dozen landers on Mars, only one on Venus (and it only lasted for an hour!), and one on one of Saturn's moons. We have hardly looked at all at Jupiter's moons, and Europa could easily have life in its oceans beneath the ice. Our Moon certainly seems lifeless, but again, we've only landed there a few times, and for only a few days each time.
Wiki User
∙ 11y ago
Wiki User
∙ 12y agoEarth is the only planet with life because it has a lot of Nitrogen. Humans need to inhale Nitrogen to breath. Humans also need other kinds of gases, but mostly Nitrogen.
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What planet in the solar system is the largest rocky planet?
The Earth.
What is the farest planet away from the earth?
Of the true planets in our solar system, Neptune is the farthest from Earth.
Which third planet is closest to the sun?
Earth is the third closest planet to the sun.
Is the Earth part of the inner or outer solar system?
Earth is the third planet. It is the inner part of solar system.
The most beautiful planet in solar system?
Earth
What is earth in the solar system?
Earth is a planet in the solar system
What kind of solar system is earth?
Earth is a planet, not a solar system.
What is the strongest planet in the solar system?
Earth is the strongest planet in the solar system
What was the earth?
The Earth is a planet in our solar system and the third planet from the sun. The Earth is the only planet within our solar system that can support life.
Is the earth is the largest planet in solar system?
The largest planet in the solar system is Jupiter.
Is Earth the second largest or the third largest planet in our solar system?
No, Earth is the fifth largest planet in our solar system.
Is earth the second smallest planet in the solar system?
No,Mars is. Earth is the fourth smallest planet known in the solar system.
Why is earth the largest planet in the solar system?
It isn't. Earth ranks 5th in size. Jupiter is the largest planet in the solar system.
Why is earth is a unique planet in our solar system?
Up to now, Earth is the only planet in our solar system that can sustain life as we know it.
What is the most humid planet in the solar system?
In the Solar System the answer is Earth since it is the only planet that has water.
What is the average destiny of planets?
Because earth is the only inhabited planet in our solar system, all but earth will no doubt remain the same. The destiny of this earth on which we live is to be celestialized at a time when its period as an earth as we know will have finished.
A planet that's in your solar system?
Earth is one of the planets in our solar system.
