Light years question is it true some things we look at are light years away and intresting ques about planets?

1.Could we see other galaxies that are light years away.with the naked eye.





2.could we move solar system were is the nearest solar system.we have technology now to heat the earth don't we.





3.If europa is a moon how can it harbour life.





4.do you hope their is life out there.





5.scientist say the key of life is water maybe that is only the Case for all the species living on the earth.Could that be possible we do not know some things may not eat at all.





4.how long will it take us to get to Europa in human years im not good with light years, when i was younger i thought build a space craft big enough for a million give them a bible and tell them to reproduce and there Mission is to get to i do not know you decide could we do this.





sorry about ppunctuationand grammar i had to rush out but really wanted your aanswersLight years question is it true some things we look at are light years away and intresting ques about planets?
1. Yes, the Andromeda Galaxy is visible to the naked eye.


2. No, we humans do not have the technology to heat the earth enough to sustain life. Also, the sun's light is a MAJOR factor in our survival. The farther away from it we are, the harder it is to live.


3. Europa is suspected to have vast oceans of liquid water below it's frozen surface, and since water is a key molecule of life (as we know it), there is a good chance that life has been able to make a footing within those vast oceans.


4a. Yes. If we are the only ones, it sure would be a waste of space - Carl Sagan


5. Yes, water is a key to life, again, as we know it. Since this is all we know, we can only speculate on to other forms of possible life.


4b. With a large chemically fueled rocket, the journey to the Jupiter system (where Europe resides) would take from 1 to 2 years (one way).





I hope this helps. Good luck.





EDIT: right now, no one knows if there is any solid land on Europa (unless you consider the frozen surface land). There are several proposals to NASA and ESA to send probes to Europa and find out. Problem is, getting through all that ice and not contaminating the oceans with microbes the probe has brought with it. Eventually, a craft will be send and many questions will be answered. And as with all new discoveries, each answer causes hundreds of new questions. I love science! :)





EDIT#2: No, Europe is not more massive than Earth. Send me an email and I can answer your questions more directly. :)Light years question is it true some things we look at are light years away and intresting ques about planets?
Just to add to Floid's answer. There is one galaxy that is visible to the naked eye, Andromeda. It looks like a fuzzy star and you need to be away from light pollution to see it. All the other galaxies are too far away to see without a telescope. One of the great things about Hubble telescope is how many new galaxies it has seen.
1. Technically, no. You can see Andromeda but only in the middle of nowhere so you don't have any light pollution, on a very clear day. Its a very tiny fuzzy dot in the Andromeda constellation. Its not just light years away, its Millions of light years away.





There are these little galaxies right by us but i would consider them part of ours considering were swallowing them up.





The billions and billions of other galaxies though we can not see. 1 (or 4 if you count ours, and the 2 were swallowing), on a clear night in places not many people live, is not enough for me to say that you can see them.





2. No we couldnt move the solar system. I doubt we would ever be able to. Im sure by the time we would figure out how to move just Earth, we would have the technology then but we dont have that now either. But really, that would be way too much work for little gain.





3. Moons can still harbor life, they are just like little planets. An asteroid can still harbor life if it had the right stuff on it. From what we know now, all life needs to stay around is liquid water, and some way to get energy i.e. food.





4. Yes very much so. And I do hope they can come to see us someday. We could learn so much.





5. Yes we could be wrong about that but, this is what we have seen so far. Until we see a life-force that does not need it, we can't say that they don't. We didn't think life would be able to survive deep deep down in the ocean until we saw it. And if flourishes down there.





6. It would take a while. Right now we have to use other planets gravity to get to further places. It saves fuel and gives you a boost while you do it. It took Galileo spacecraft 6 years to do it that way. The New Horizons spacecraft on its way to Pluto did it in a little over a year. It depends on how fast we can make the ship go.





We don't measure things in our solar system in light years. Light leaves our solar system in less than a year so its pointless to do that. We only measure things far away with them.





Your additions:





We wont have a person on it for a very long time. Were still trying to convince people its a good idea to send someone to Mars, let alone all the way out to Jupiter. Travel to and from Mars has to become a normal thing before we can think about sending someone all the way out there, sadly. I would love for it to happen as well.





7. Europa has a large layer of ice on it. The oceans are deep below it. Miles below it in fact. That is one of the problems; we have to figure out a way to land something on there, then get it to melt all the way through the ice. One day we will though.





Europa is much smaller than earth. Its about 25% the size of Earth.





Yes, the further out something is, the further in the past you are seeing it because light, as fast as it is, is still slow compared to the vast distances in the universe. It takes 8 min from the light that leaves the sun, to reach us.
1. not where i live b/c light pollution


2. andromeda is closest neighboring galaxy - 2.5 million light-years away


3. just because it's a moon doesn't mean it can't be any different than a normal planet - just it will be caught in an orbit around another planet opposed to orbiting the star, europa is strange because of it's large crevasses , which they think water once was present, thus potential for life


4. i hope so, but i hope they stay away from us... we (humans) are only interested in benefiting ourselves, we will exploit them...


5. that is true, a lot of scientist believe that the key is water, but they are only looking for what they know...which is earth-like life... this does not mean that the life forms we could find in space couldnt be a non-carbon based lifeform...


4. you dont know how to add by 1? this should be question number 6...








EDIT:


in response to your addition... what we have found here on earth is that life is very resilliant and adapts to almost any environment - take the deep water hot spots, where those worms live off the methane and other lethal chemicals that would be harmful to many other species... i dont think a planet like ours is required for life to thrive
1.) Yes





2.) Possibly... I don't know offhand what the closest planet out of our solar system is, I am sure you can find that out easily though yahoo or google.





3.) Who said a moon can't have life?





4.) I don't really care.





5.) Well, depends on your definition of ';eat';. Any life form must have an outside source of energy it uses... this may not be something it ';eats'; as in chews up and swallows, but it does have to ';eat'; as in get energy from outside itself somehow.





(the second) 4.) Depends on how fast the space craft can go and how far Europa is away.