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Well, before you read this question try and think about all the different planets and if they would be suitable for human life. Now to answer the question. It would be possible to live on the moon but with no air, not food or water it would take a lot of effort and hard word. Other planet may have air and water (or we could take it there) but we would have to get there first.

But here are some reasons that we can't live on any other planets. (This is unless we develop lots of new technology space things).

Mercury- We can live on Mercury because our bodies are not made for the hotness is the daytime and the coldness in the nighttime. Mercury has no air, water, oxygen or carbon, nothing. Mercury also has no atmosphere to protect our human bodies from radiation.

Venus- Venus is a even hotter than mercury and is a hot waste land. It has a very thick atmosphere due to an irreversible greenhouse affect. Venus also has no water, and has mainly carbon dioxide. Plants couldn't live on it, because it is too hot, so we couldn't fill the planet with oxygen. Venus is the hottest planet in the solar system.

Mars- Mars is one other possible planet that we could live on. But first we would have to warm the planet as now it is 150 degrees centigrade. That's cold. Mars has a thin atmosphere but inducing global warming on it will warm it up by thickening the atmosphere. Mars also have very little water. Mars currently has no oxygen but is filled with carbon dioxide. So if Mars warmed up a little bit then it could support plant life to some extent, which then will produse some oxygen.

Jupiter- Jupiter is a gas giant. The only solid part is the core which is extremely hot. It has extreme weather patterns and that combined with its gravity would rip anything apart that landed on it. Jupiter is also very hot and is not suitable for the human body. This planet has the second fastest wind speeds in our solar system.

Saturn- Saturn is much the same as Jupiter with the weather patterns, is a gas giant, and the only solid part is the core (which is extremely hot). Apart from that there is no place to land on Saturn.

Uranus- We can't colonize on Uranus because first of all it is too cold. It is so cold that most of it' s gases are in liquid form. It has a ocean of hydrogen along with other gases. Uranus can't sustain any life as it has no water, no oxygen, no food, nothing.

Neptune- Neptune is another planet that we can't live on. It is the same as most planets no oxygen, no food, no water or anything else that mankind need to survive. Apart from that Neptune has the most fierce turbulent weather patterns. It has the most fierce winds in our Solar system.

Pluto- Pluto may be a planet or may not, but for now I will count it as a planet. Basically Pluto has nothing . Pluto has no water, no oxygen and no food. It may not even have a atmosphere. It is too cold for human colonization.

So to sum it up. The reason that we can't live on most other planets is because they don't supply the basic human needs (Water, oxygen and food.) The planets may have other reasons why we can't live on it, maybe because of the temperature or the weather. But in the end I think all humans (no matter how much they think they want to) would rather live on Earth as it has everything a human needs.

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Will we be able to live on other planets? Why/Why not?

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Well, before you read this question try and think about all the different planets and if they would be suitable for human life. Now to answer the question. It would be possible to live on the moon but with no air, not food or water it would take a lot of effort and hard word....

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NASA/Johns Hopkins University Applied Physics

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Check out Anyhoo, the latest show from Revision3. Anyhoo is a daily dose of surprising lists and bizarre facts. Watch it here: http://rev3.co/AnyhooPlaylist Where do we go once Earth is uninhabitable? Probably not anywhere in this solar system. Find out why we can't jump ship and start a new civilization on any of our neighboring planets.

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Support Brilliant Botany on Patreon: http://www.patreon.com/brilliantbotany A video about plants' amazing ability to sense and adjust to gravity, a concept known as gravitropism. Brilliant Botany is an educational STEM channel focused on inspiring enthusiasm about the plant world. The channel features videos highlighting topics in current research, the fundamentals of plant science and tutorials.

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Do they really need gravity??

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When researchers sent plants to the International Space Station in 2010, the flora wasn't meant to be decorative. Instead, the seeds of these small, white flowers-called Arabidopsis thaliana-were the subject of an experiment to study how plant roots developed in a weightless environment.

Gravity is an important influence on root growth, but the scientists found that their space plants didn't need it to flourish. The research team from the University of Florida in Gainesville thinks this ability is related to a plant's inherent ability to orient itself as it grows. Seeds germinated on the International Space Station sprouted roots that behaved like they would on Earth-growing away from the seed to seek nutrients and water in exactly the same pattern observed with gravity. (Related: "Beyond Gravity.")

Since the flowers were orbiting some 220 miles (350 kilometers) above the Earth at the time, the NASA-funded experiment suggests that plants still retain an earthy instinct when they don't have gravity as a guide.

"The role of gravity in plant growth and development in terrestrial environments is well understood," said plant geneticist and study co-author Anna-Lisa Paul, with the University of Florida in Gainesville. "What is less well understood is how plants respond when you remove gravity." (See a video about plant growth.)

The new study revealed that "features of plant growth we thought were a result of gravity acting on plant cells and organs do not actually require gravity," she added.

Paul and her collaborator Robert Ferl, a plant biologist at the University of Florida in Gainesville, monitored their plants from the Kennedy Space Center in Florida using images sent from the space station every six hours.

Grown on a nutrient-rich gel in clear petri plates, the space flowers showed familiar root growth patterns such as "skewing," where roots slant progressively as they branch out.

"When we saw the first pictures come back from orbit and saw that we had most of the skewing phenomenon we were quite surprised," Paul said.

Researchers have always thought that skewing was the result of gravity's effects on how the root tip interacts with the surfaces it encounters as it grows, she added. But Paul and Ferl suspect that in the absence of gravity, other cues take over that enable the plant to direct its roots away from the seed and light-seeking shoot. Those cues could include moisture, nutrients, and light avoidance.

"Bottom line is that although plants 'know' that they are in a novel environment, they ultimately do just fine," Paul said.

The finding further boosts the prospect of cultivating food plants in space and, eventually, on other planets.

"There's really no impediment to growing plants in microgravity, such as on a long-term mission to Mars, or in reduced-gravity environments such as in specialized greenhouses on Mars or the moon," Paul said. (Related: "Alien Trees Would Bloom Black on Worlds With Double Stars.")

The study findings appear in the latest issue of the journal BMC Plant Biology.

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When researchers sent plants to the International Space Station in 2010, the flora wasn't meant to be decorative. Instead, the seeds of these small, white flowers-called Arabidopsis thaliana-were the subject of an experiment to study how plant roots developed in a weightless environment.

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Quick video of what makes our Earth habitable

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What makes different from other planets in our solar system or any where else. THANK YOU. Please subscribe. comment your suggestions for future videos.

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TED talk by David Brain

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What a planet needs to sustain life | Dave Brain

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What makes different from other planets in our solar system or any where else. THANK YOU. Please subscribe. comment your suggestions for future videos.

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What makes our earth special compared to other planets

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What makes our earth special compared to other planets

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Earth is one special planet.

It has liquid water, plate tectonics, and an atmosphere that shelters it from the worst of the sun's rays. But many scientists agree our planet's most special feature might just be us.

"It?s the only planet we know of that has life," said Alan Boss, a planet formation theorist at the Carnegie Institution of Washington in Washington, D.C.

Though other bodies in our solar system, such as Saturn's moon Titan, seem like they could have once been hospitable to some form of life, and scientists still have hope of eventually digging up microbes beneath the surface of Mars, Earth is still the only world known to support life.

"So far, we haven't found it anywhere else," said Alex Wolszczan of Pennsylvania State University, who co-discovered the first planets beyond our solar system. He agreed that life was Earth's single most impressive characteristic.

None of this is a revelation, but understanding what's special about Earth is crucial for finding other planets out there and predicting what they might be like.

The fact that Earth hosts not just life, but intelligent life, makes it doubly unique. And the planet's intelligent life (humanity) has even developed rockets that enable travel beyond the planet, said Gregory Laughlin, astrophysicist and planet hunter at the University of California, Santa Cruz.

"During the last half century, the planet Earth has fashioned together tiny pieces of the metal in its crust, and has flung these delicately constructed objects to all of the other planets in the solar system," Laughlin said, adding that these achievements should be counted as an exemplary trait of our planet.

"From our anthropocentric viewpoint, we naturally separate ourselves from the planet that we live on, but if one adopts the point of view of an external observer, it is the 'planet' (taken as a whole) that has done these remarkable things," he told SPACE.com.

Water World

To enable life, this most special of attributes, planet Earth has a number of ideal features. It is unique among planets in our solar system for having water in its liquid form at the surface, in an amount conducive to life evolving.

"The most impressive attribute of the Earth is the existence and amount of liquid water on its surface," said Geoffrey Marcy, an astronomer at the University of California, Berkeley who has helped discover dozens of extrasolar planets. No one knows why Earth has the exact amount of water it does, which is relatively small considering that water molecules outnumber silicate molecules in the galaxy, he said.

"The Earth is remarkable for its precisely-tuned amount of water, not too much to cover the mountains, and not so little that it's a dry desert, as are Mars and Venus, our 'sister' planets," he said.

Goldilocks planet

Earth's water is also special in that it has remained liquid for so long. How has Earth been able to hold on to its oceans while those on other planets freeze or fry?

"Many details as to why Earth is the only planet with liquid water in our solar system need to be worked out," said Diana Valencia, a graduate student in Earth and Planetary Sciences at Harvard University. "Certainly the distance to the sun has made it possible. A planet much farther in would receive too much energy from the sun, and a planet too far out would quickly freeze."

Our planet's Goldilocks-like "just right" location in the solar system has helped, as has its system of plate tectonics ? the slip-sliding movements of Earth's crust that are thought to have created the planet's towering mountain ranges and plummeting ocean depths.

"The fact that Earth has plate tectonics allows for the carbon-silicate cycle to operate over geological timescales," Valencia said. "With the carbon-silicate cycle, the levels of carbon in the atmosphere get regulated to keep the surface temperature around that of liquid water."

Plate tectonics and water are inextricably linked. Not only does plate tectonics enable liquid water to exist by way of regulating the temperature, but many scientists have argued water enables plate tectonics to happen.

"Without water the planet would be geologically dead," said Caltech's Mike Brown, discoverer of the newly reclassified "plutoid" object named Eris, which lies beyond Pluto in our solar system. "Water is what lubricates plate tectonics, which is what leads to the extreme difference between continents and seafloors, the large amount of earthquakes and volcanoes, fresh mountain-building. Venus has no water, no plate tectonics, no deep sea floor, no steep mountains, no continents, probably few earthquakes or volcanoes. A much less geologically interesting place!"

Another "just-right" aspect of Earth is its size: If it was much smaller, it wouldn't be able to hold on to our precious atmosphere, but much larger and it might be a gas giant too hot for life.

The presence of our big brother planet, Jupiter, farther out in the solar system blocking Earth from much of the incoming debris, has also helped Earth become a safe haven for life. Jupiter acts like a giant broom, sweeping the solar system of debris ? rocks as small as cars and as huge as moons ? that could snuff out life in one fatal blow. This protective effect was particularly helpful in the solar system's early years, when Earth still got pummeled but, scientists say, not nearly as bad as would have been the case without Jupiter.

A friendly moon

Life on Earth may also owe a debt to our nearest celestial neighbor, the moon.

Earth's moon stabilizes our planet's rotation, preventing drastic movements of the poles that could cause massive changes in climate that some scientists think could have doomed any chance for budding life to form or evolve.

The moon also helpfully pulls the ocean's tides, which scientists suggest might have been the perfect place for early life to begin evolving to survive on land.

Though Earth has the necessary ingredients for life, it's unclear whether the development of life here might have been a one-time fluke, or if it's something that happens pretty much everywhere the conditions are right.

Rare Earth

All of these features make Earth special among known planets near and far.

"You hear all the time how Earth-like Mars is, but if you were taken to Mars you wouldn?t feel happy there at all," said University of Washington astronomer Don Brownlee, author of the book "Rare Earth" (Springer, 2003). "It's not Earth-like. And Titan, when the [Huygens] probe landed, there was all this stuff in the media about how Earth-like it is. Earth-like? It is completely different. It has all this methane on the surface. Venus has about the same mass [as Earth], almost the same distance from the sun. But it?s a totally different place ? no oceans, no plate tectonics ? and it's not a place you would want to be."

So far, we haven't seen any planet outside the solar system come very close to Earth either.

Of the nearly 300 new worlds glimpsed elsewhere in the galaxy, most are "hot Jupiters" ? large planets that orbit close to their stars, on which life and liquid water are unlikely to exist.

"I doubt that in our galaxy typical stars have planets just like Earth around them," Brownlee said. "I'm sure there are lots of planets in the galaxy that are somewhat similar to Earth, but the idea that this is a typical planet is nonsensical."

Brownlee's view may be in the minority, however.

Not-so-special Earth

As our planet-hunting technology improves, many planet hunters expect to find Earth's twin. The search has led scientists to debate whether Earth is really as special as we think it is.

"In the past 10 years, everything has been pointing in the direction of, 'Hey, the solar system, which we thought was unique, is not unique at all,'" said Alan Boss.

Boss and many other scientists think it's likely that some form of life exists on some of those countless other planets out there.

"Certainly there will be other planets that support life," he said. "I think life is actually quite common. I think we're going to find there are literally billions of them in the galaxy."

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What Makes Earth Special Compared to Other Planets

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Earth is one special planet. It has liquid water, plate tectonics, and an atmosphere that shelters it from the worst of the sun's rays. But many scientists agree our planet's most special feature might just be us. "It?s the only planet we know of that has life," said Alan Boss, a planet formation theorist at the Carnegie Institution of Washington in Washington, D.C.

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It's all about Earth's tilt!

Many people believe that Earth is closer to the Sun in the summer and that is why it is hotter. And, likewise, they think Earth is farthest from the Sun in the winter.

Although this idea makes sense, it is incorrect.

It is true that Earth's orbit is not a perfect circle. It is a bit lop-sided. During part of the year, Earth is closer to the Sun than at other times. However, in the Northern Hemisphere, we are having winter when Earth is closest to the Sun and summer when it is farthest away! Compared with how far away the Sun is, this change in Earth's distance throughout the year does not make much difference to our weather.

There is a different reason for Earth's seasons.

Earth's axis is an imaginary pole going right through the center of Earth from "top" to "bottom." Earth spins around this pole, making one complete turn each day. That is why we have day and night, and why every part of Earth's surface gets some of each.

Earth has seasons because its axis doesn't stand up straight.

But what caused Earth to tilt?

Long, long ago, when Earth was young, it is thought that something big hit Earth and knocked it off-kilter. So instead of rotating with its axis straight up and down, it leans over a bit.

By the way, that big thing that hit Earth is called Theia. It also blasted a big hole in the surface. That big hit sent a huge amount of dust and rubble into orbit. Most scientists think that that rubble, in time, became our Moon.

As Earth orbits the Sun, its tilted axis always points in the same direction. So, throughout the year, different parts of Earth get the Sun's direct rays.

Sometimes it is the North Pole tilting toward the Sun (around June) and sometimes it is the South Pole tilting toward the Sun (around December).

It is summer in June in the Northern Hemisphere because the Sun's rays hit that part of Earth more directly than at any other time of the year. It is winter in December in the Northern Hemisphere, because that is when it is the South Pole's turn to be tilted toward the Sun.

Earth's lopsided orbit

Earth's perihelion (point closest to Sun) = 91,400,000 miles from Sun

Earth's aphelion (point farthest from Sun) = 94,500,000 miles from Sun

While that is a difference of over 3 million miles, relative to the entire distance, it isn't much.

And, believe it or not, aphelion (when Earth is farthest from the Sun) occurs in July, and perihelion (when we are closest) occurs in January. For those of us who live in the Northern Hemisphere where it's summer in July and winter in January, that seems backwards, doesn't it? That just goes to prove that Earth's distance from the Sun is not the cause of the seasons.

Related Resources for Educators

Seasons (Educator Guide to go with Seasons Spotlite video)
Seasons (Nearpod Lesson to go with Seasons Spotlite video)
Our World: Sun's Position
Sun's Position (Educator Guide to go with Sun's Position Spotlite video)
Sun's Position (Nearpod Lesson to go with Sun's Position Spotlite video)

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Rotation and Revolution of Earth | Educational Video for Kids

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Learn about the rotation of the earth

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Science Song - Earth, Moon, Sun, and Stars - SC.4.E.5.4

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Lyrics... Chorus: The rotation of the Earth creates night and day And you gotta know a little 'bout each moon phase Earth and apparent movements of the Sun, Moon, and stars Are connected. Oooh, just like a work of art.

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The Moon and Venus shine in the skies of Cerro Paranal, home of ESO's Very Large Telescope (VLT). Below them, the Milky Way glows crimson.

Credit: ESO/Y. Beletsky

Have you ever wondered why most star patterns are associated with specific seasons of the year? Just why, for instance, can evening skywatchers in the Northern Hemisphere enjoy Orion the Hunter only during the cold wintry months?

During balmy summer evenings it is not Orion, but the stars of Scorpius, the Scorpion, that dominate the southern sky. Spring evenings provide us with a view of the Sickle of Leo, the Lion. But come fall evenings, it's the Great Square of Pegasus that vies for the stargazer's attention.

The change is subtle, to say the least.

Were we to watch the sky on any night from dusk to dawn we would notice certain stars rising from above the eastern horizon in the evening hours. They would sweep across the sky during the night, finally setting beneath the western horizon by dawn. No big deal here, since, after all, the sun does the same thing during the daylight hours.

But with the passage of time, we would notice something rather puzzling.

Those stars that were low over the western horizon during the early evening hours would, within a matter of a few weeks, disappear entirely from our view, their places taken up by groups that a few weeks earlier were previously higher in the sky at sundown. In fact, it would seem that with the passage of time, all the stars gradually shift westward while new stars move up from the eastern horizon to take their place.

But just why is this shift happening?

As our Earth whirls through space around the sun, its motions cause night and day, the four seasons and the passage of the years. If we were to synchronize our clocks using the motions of the stars as a reference, we would discover that the Earth completes a single turn on its axis not in 24 hours, but actually four minutes shy of that oft-quoted figure: 23 hours 56 minutes.

As a result, the stars appear to rise, cross the sky, and set four minutes earlier each night. This amounts to a whole hour earlier in 15 days and two hours earlier in 30 days.

A little quick arithmetic shows that with a difference of two hours per month, that in one year the cycle will come full circle (12 months times two hours equals 24 hours), since each star completes a full circle around the sky during the course of one year.

This can be made clearer by trying an experiment. Suppose you look skyward tonight and pick out a bright star, then line it up with a nearby landmark (like a telephone pole or the peak of your neighbor's roof).

Make sure you note the exact time and the exact spot when you lined up the star. Then come back the next night at the exact same time and stand in the exact same place. You'll see that the star has apparently shifted slightly to the right (west) of the position that it was at the previous night.

Had you arrived four minutes earlier, the star would have lined up exactly with the nearby landmark just as you had seen the previous night.

This apparent westward drift of the stars, incidentally, is a motion that is in addition to the daily rising, circling and setting, because the Earth does not simply stand in the same spot in space and spins, but is constantly rushing eastward along in its orbit around the sun.

It carries us steadily toward and under the stars to the east and away from the stars that we are leaving in the west, until we make a complete circle around the sun, bringing us back to our original position in one year.

And then ... the whole performance starts again.

At this point you might be a bit confused. If the Earth takes 23 hours 56 minutes to turn on its axis, why do we say that a day is 24-hours long?

Astronomers have devised special clocks adjusted to keep time solely by the stars. These astronomical clocks keep "sidereal" (star) time. There is no a.m. or p.m. in a sidereal day.

With the 12-hour clocks that we use every day, the hour hand goes completely around 12 hours twice a day. But with a sidereal clock, there are 24 hourly numbers on the dial instead of 12 and the hour hand goes around only once in a sidereal day.

The hours start at 00 hour (zero hour) and are numbered straight through to 23 hours and then starts at the zero hour again. The other difference is that the sidereal clock runs four minutes fast as compared with a regular clock.

Now, if our daily lives were governed by the sidereal clock, there would be times during the year when the sun would appear highest in the sky at noontime, but at other times of the year it would appear highest at midnight; setting at 6 a.m. (or something else strange).

We're accustomed, of course, to be awake when it's light and asleep when it's dark, so astronomers also developed a "mean" sun, which governs our ordinary clocks and results in 24-hour (solar) time of which we are all accustomed to.

The mean sun, however, is fictitious and for most of the year deviates somewhat from the true sun's position in the sky. It was invented only to make 24-hour timekeeping by the sun mathematically correct.

So the next time you go outside at night and can't find a star you thought was supposed to be there, keep in mind that you're not standing still. The Earth is always in motion, whizzing through space and circling the sun, and can make checking your watch a real headache when you contemplate it all.

Joe Rao serves as an instructor and guest lecturer at New York's Hayden Planetarium. He writes about astronomy for The New York Times and other publications, and he is also an on-camera meteorologist for News 12 Westchester, New York.

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Why the Night Sky Changes With the Seasons

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Have you ever wondered why most star patterns are associated with specific seasons of the year? Just why, for instance, can evening skywatchers in the Northern Hemisphere enjoy Orion the Hunter only during the cold wintry months? During balmy summer evenings it is not Orion, but the stars of Scorpius, the Scorpion, that dominate the southern sky.