where ?
when?
how?
2007-02-13 04:17:02 · 10 answers · asked by prithviraj r 1 in Science & Mathematics ➔ Astronomy & Space
Well technically why is there life in this planet?????? The answer to that is :
Its Size
Its Distance from the sun
And Gravity.
Our planet size makes it possible to have gravity, the distance to the sun makes it possible to have atmosphere. with all this in place nature itself and evolution started where water was created, them living cells that created ozono and then with the ozono everything else. So it is a very complex and hard to explain systematic evolution where some precise conditions have to exist. Now, if we take in consideration that only this 3 factors are needed them we could conclude that any planet that have this properties could have life.
"Once a planet has been detected, repeat observations over its "year" will determine its orbital period and distance from the parent star. This already will give an important first clue to its temperature, i.e., whether it does indeed lie within the star's habitable zone. Another key characteristic is the planet's size, and hence its mass. Even if the planet is located in a stellar HZ, too small a mass means that any atmosphere will be quickly lost, whereas too large a mass could mean an atmosphere so thick so that sunlight does not reach its surface. Mass also determines the likelihood of plate tectonics; in turn this may be important in cycling surface material and hence affecting the conditions conducive for life. "
http://origins.jpl.nasa.gov/habitable-planets/invest13.html
Actually not long ago NASA found a planet that has the same properties as ours. The same size, about the same distance to the sun, just very minimal km. So, who knows................................
2007-02-13 07:57:44 · answer #1 · answered by Bruno 2 · 0⤊ 1⤋
Europa ties with Mars; liquid water, organics and an energy source (geothermal). We should be looking a lot closer at Europa... but Mars is much easier to get to, we need nuclear propulsion. Next I would say Enceladus, a tiny moon of Saturn, which also has the 3 requirements... probably. Ganymede and Callisto have oceans 100 miles under the ice crust surface... but what energy sources? A long shot would be Titan although its pretty cold there; it would have to be "life as we don't know it" and use something else besides water as a liquid solvent. The dark horses would be Venus (in the clouds 50 miles up) and Io which has a lot of energy sources; again life as we don't know it. And there is always the Jovian planets which have huge atmospheres with clouds that have Earth-like conditions of temperature and pressure.. but can life form in a gas or does it need a liquid (ocean)? I suspect life is pretty much everywhere there is (1) liquid water (2) organic carbon-based chemistry happening (food) and (3) an energy source life can utilize for metabolism.
2007-02-13 10:56:37 · answer #2 · answered by stargazergurl22 4 · 0⤊ 0⤋
Current technology is only able to find massive gas giants. Scientists are working on a way to find Earth size planets. Right now, we are unable to find planets smaller than Neptune. Maybe in 10 years we could detect planets like Earth.
2007-02-13 04:59:26 · answer #3 · answered by bldudas 4 · 2⤊ 0⤋
There has to be a planet out there with intelligent life. I mean, there are billions of galaxies in the universe. Within those galaxies, there are billions of solar systems. It's just a matter of being able to find the technology to send a signal out that far.
2007-02-13 04:29:29 · answer #4 · answered by keeperofpuppies 3 · 2⤊ 0⤋
Maybe we already have found planets with life on them atronomers see new stars and planets through their telescopes and perhaps there is life on one and we just dont know it yet. but even if we did find inteligent life out there the world isnt ready to know yet humans are too afraid of what they do not know and understand and shoot first and ask questions later. if an alien popped into your house in the middle of the night even just waving his hand trying to say hello you would probally freak and start screaming lol
2007-02-13 05:05:14 · answer #5 · answered by VibeLord . 3 · 0⤊ 1⤋
I'm betting we'll find bacterial life on Mars within the next 10 years.
2007-02-13 04:33:19 · answer #6 · answered by blahblah 3 · 2⤊ 0⤋
We probably have already founf it on Mars, but the government is covering it up. Intelligent life, hopefully, we will hear from another civilization by radio someday. I pray we do not scare the off ;)
2007-02-13 04:25:54 · answer #7 · answered by F T 5 · 0⤊ 2⤋
yes why not
where:Here In earth
When:maybe in 15 years
How:They will find us
2007-02-13 04:32:50 · answer #8 · answered by Anonymous · 0⤊ 0⤋
Where? = Out there.
When? = In the Future.
How? = Radio Contact
2007-02-13 04:22:35 · answer #9 · answered by Grant d 4 · 2⤊ 1⤋
There are lots of them but we will probably never find one.
2007-02-13 04:45:15 · answer #10 · answered by Billy Butthead 7 · 0⤊ 1⤋