Why is earth the only planet as far as you know that has life on it?
The operative part there is "so far as (we) know". Although dozens of extra-solar planets have been discovered, as well as the other seven or eight in our solar system, our science so far is unable to determine if any of them have "life", as least "life" as we know it. Our definition of life is 'earth-based', in other words we can only define life by the kinds of lifeforms we observe here on earth. So if we can't imagine any life forms from earth existing on other planets, we say they are "lifeless". This may or may not be true, but we don't have any other way do define life. Certain moons of the outer planets have what may be the proper environment for some kinds of life - Europa, or Io for example. We believe there may be liquid water there, in some areas, and that is one of the major requirements for life. We don't believe that intelligent life forms can exist on frozen planets, or those with barren rocky surfaces and high temperatures - Mercury and Venus, for example. Jupiter and Saturn are huge balls of gas, and probably don't have any solid surface - so if any life forms exist there, they'd have to be wildly different from anything we know here. Neptune and Uranus are similar gas balls, but we're not sure if they have any life. They are so far from the Sun, and so cold, that life as we know it could not exist there. Many people believe that Mars once had life of some sort, because there is evidence that Mars had liquid water, and some atmosphere. Our probes there now are searching for any thing that would support that hypothesis. We just don't know enough about the planets we've discovered around other stars yet. However, given the number of stars, and the number of planets we've discovered, it would be foolishly earth-centric to believe that we are the ONLY life in the universe. The cosmos is probably teeming with life, we just haven't recognized it yet.
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"skyfish" found in space . So there are some other planets sports life as well .
So far, Earth seems to be the only planet in our solar system with abundant carbon-based lifeforms. There are likely some remnants of such life on the other solar planets, if …only as transplanted by meteoric collisions with Earth. It is unknown if the conditions for Earth-like life exist elsewhere, or if any actually developed in those conditions. Life has not yet been found anywhere else other than on Earth. So, to answer your question - to the best of our knowledge to date, yes.
It is not clear that Earth is the only planet with life. For all we know there might be, and most astronomers expect that there probably are, planets with life on them orbit…ing a significant fraction of the hundreds of billions of stars in each of the hundreds of trillions of galaxies in the universe. Present technology is barely able to detect that planets are there orbiting other stars, we cannot yet tell whether any exoplanets (as planets of other stars are called) have life on them. As for the other planets in this solar system, Mercury and Venus are too hot to have liquid water on them, and Neptune and Uranus are too cold to have liquid water on them. Mars might have life remaining in its underground water, and there are speculations that life of a sort might be possible on Jupiter, Saturn, and the moon Titan, but (a) that's a long shot, and (b) we haven't looked yet. A previous answer to this question said that Earth is the only planet with life because it is the only planet with nitrogen. That is utterly wrong. Mars, and Titan also have atmospheres consisting mostly of nitrogen, besides which nitrogen is a minor constituent of the atmospheres of Venus, Jupiter, Saturn, Uranus, and Neptune.
Because it is the perfect length away from the sun so it will not burn through the atmosphere
Earth is a great planet because, Earth is just right where it is, if Earth was closer to the Sun then it would be too hot and the water like lakes and oceans would boil and th…ere will be no water.. But if we were farther away then it would be really cold to live on Earth.. We are living on Earth because it is just right to be living on it.
Earth is the only planet that has life on it because it is just the right temperature to grow plants, and as you know,that plants give us oxygen to breathe in which is why me …and you are alive right now!! If you ask someone why is there no life in Mercury, he/she will say that mercury is way too close to the sun and is too hot to grow any plants. Therefore Earth gets the right amount of heat to grow plants in. A Extra Fact Earth is the only planet we've taken a really close look at. For all we know, there are half a dozen other planets and moons in our system supporting life at this very moment.
Earth is the only planet "so far" - we've only just begun to explore other planets. Earth is the only planet with enough oxygen to sustain life. Also, the ozone layer prote…cts us from the harmful rays that come from the sun.
It might not be the only planet with life. Life could exist on planets outside our solar system. There is just no way of finding life on one of these planets without actually …going there. There is even a slight possibility of life on Mars.
In our solar system, Earth is in a favorable position with idealtemperatures for life not too close to the Sun (where water wouldbe gaseous) and not to far away (where water w…ould be solid and itwould be a frozen world). Tidal effects are also believed favorableto life; as is the Earth's powerful magnetic field which helpsprevent the atmosphere being swept away by the solar wind as mayhave happened on Mars, leaving it dry and arid. Some scientistsindicate our solar system is also in a favorable position in thegalaxy in terms of distance from the galactic core. Current thinking is that there may be as many as 40 billionEarth-liike planets just in our galaxy alone and that likely manyof these are likely to have life on them. It's also possible theremight be life in subsurface oceans in moons of our gas giantsJupiter and Saturn, like Europa, Encedalus, and Titan - whoseoceans are liquid because of warming effects from tidal forces.
Not all scientists believe this. The topic of Earth being the only planet in the known universe to support life has been and still is a heated debate amongst many scientists.
Earth is the only planet known to have life on it, however with the vastness of space the likelihood of life not existing anywhere else is astronomically low. We just havent f…ound it yet.
We human beings originated on the planet Earth and so far we have briefly visited the moon but have not established any permanent residence there, nor have we even visited any… of the other planets (not in person, we have sent robotic probes).
You need water to live and other planets don't have water
Actually not exactly... They think MARS can have life. They found WATER on mars, so, no, Earth might not be the only planet with life.
There is life due to the following reasons: 1) Atmosphere: Our atmosphere has the correct thickness to filter the harmful UV radiations from the Sun. Although not essentia…l for all life, oxygen is important for much of the life on Earth. 2) The temperature seems to be almost ideal. 3) Liquid surface water - Life started in water. It is a precious resource needed to sustain all life, as we know it. For more details, visit the link below.
Earth is only one planet on solar system which has sustainable atmosphere. In other words, Earth got all the factors that can support the life. Edit: Temperature is important… too, and liquid water seems to be essential.