100 Billion planets in the Milky Way Options

[mmi16]

There is no way we can be the ONLY intellegent life in the Universe.

http://news.yahoo.com/100-billion-alien-pl...-221353897.html

[stxprowl]

There is no way we can be the ONLY intellegent life in the Universe.

http://news.yahoo.com/100-billion-alien-pl...-221353897.html

I just wonder if us (peope on earth) have thought about if we found other life or they found us how we'd try and comunicate with them, and if they tried to take over our planet, how would we defend ourselves? lol its funny but at the same time a serious topic. I belive theres life out there. The only question for me is, are we the advanced life or is the life out there more advanced then us? I also wonder if one country were to have proof if other countries like ours tell them not to discose the info for fear of panic.

This post has been edited by stxprowl: Jan 3 2013, 09:57 AM

[vomit]

There is no way we can be the ONLY intellegent life in the Universe.http://news.yahoo.com/100-billion-alien-pl...-221353897.html

Who says we are intelligent?

...but I digress. I saw that article as well. Very interesting. I always felt that planets would be fairly common. Growing up, there was a lot of speculation about the nature of planet-formation, and many thought our solar system might be unique.

Glad, it's not. let's hear it for the Universe!

[mmi16]

I just wonder if us (peope on earth) have thought about if we found other life or they found us how we'd try and comunicate with them, and if they tried to take over our planet, how would we defend ourselves? lol its funny but at the same time a serious topic. I belive theres life out there. The only question for me is, are we the advanced life or is the life out there more advanced then us? I also wonder if one country were to have proof if other countries like ours tell them not to discose the info for fear of panic.

The only one's we have to fear are those who have managed to create a physical travel medium that can exceed the speed of light - We calculate the distance of celestial objects in Light Years and the Earth is (if my memory is right) 8 Light Minutes from the Sun.

The Voyager space craft was launched in 1977 to exit our Solar System and use the gravitation of each of the planets beyond Earth to assist in accelerating the space craft....News Article several weeks ago stated that while the space craft has passed Pluto's orbit, it is still within the gravitational pull of the Sun and has thus not exited the Solar System - 1977 was 36 years ago.

Interstellar travel will have to exceed the Speed of Light. A Tall TAll TALl TALL order.

[Sagebrusher]

I still think a biosphere like the one Earth has may be extremely rare. There were a LOT of special circumstances that came into play. For example, the sun is slowly increasing it's output, something like 1 percent per 100 million years. 3 billion years ago we therefore received considerably less energy than we do now. You would think it would have been too cold for life...but there was more CO2 in the atmosphere!
Life itself was partly responsible for the reduction in CO2 as plants and animals used it and then got buried in rocks.

Post #479

[zaxflaya]

I still think a biosphere like the one Earth has may be extremely rare. There were a LOT of special circumstances that came into play. For example, the sun is slowly increasing it's output, something like 1 percent per 100 million years. 3 billion years ago we therefore received considerably less energy than we do now. You would think it would have been too cold for life...but there was more CO2 in the atmosphere!
Life itself was partly responsible for the reduction in CO2 as plants and animals used it and then got buried in rocks.

Post #479

So do you think it's possible that Earth is the only place in the universe with life?

[Sagebrusher]

So do you think it's possible that Earth is the only place in the universe with life?

No, that would be highly unlikely with a 100 billion planets in this galaxy and at least that many galaxies in the universe...

I'm just saying that an evolved biosphere like ours might be rare but that is a relative thing when you talk about those kinds of numbers.
We really won't know if it is rare or not until we get out there.


Post #480

This post has been edited by Sagebrusher: Jan 10 2013, 10:16 PM

[mmi16]

No, that would be highly unlikely with a 100 billion planets in this galaxy and at least that many galaxies in the universe...

I'm just saying that an evolved biosphere like ours might be rare but that is a relative thing when you talk about those kinds of numbers.
We really won't know if it is rare or not until we get out there.
Post #480

And until we come up with a means to transport something faster than the speed of light - we cannot 'get out there'.

Voyager was launched in 1977 (I think) and has used the various planets gravitational pull to increase it's speed, while it has gone past Pluto's orbit, it is still within the gravitational pull of the Sun - 36 years and it still hasn't left our own Solar system, let alone approach another Solar system.

[Sagebrusher]

And until we come up with a means to transport something faster than the speed of light - we cannot 'get out there'.

Voyager was launched in 1977 (I think) and has used the various planets gravitational pull to increase it's speed, while it has gone past Pluto's orbit, it is still within the gravitational pull of the Sun - 36 years and it still hasn't left our own Solar system, let alone approach another Solar system.

Sure we can, fission is enough for slow trips... only 1000 years to Alpha Centauri....

Project Orion

[mmi16]

Sure we can, fission is enough for slow trips... only 1000 years to Alpha Centauri....

Project Orion

In 1000 years generations will have forgotten why the trip was untaken in the first place.