Life on moon rather than planet

In summary, Kepler is a device that is designed to find Earth-like planets by measuring a dip in the brightness of a star as a planet passes in front of it. However, due to the difficulty of detecting moons around gas giants, it is concentrating its efforts on finding planets instead.
  • #1
calis
30
0
why planethunters and astrobiologists are concentrating on finding life on Earth like planet with an orbit around host star rather than on jupiterlike planets moon

i was browsing through the essentials of complex life to evolve on a planet. i am sure you all pretty much know that.

plate tectonics,
reasonable gravity (1/2 Earth to 10 Earth masses)
massive magnetic field
big moon to stabilize planets tilt
certain degree of vulcanism
habitable zone
water
etc.

i was adding up probabilities for thease occations to happen on earthlike planet. and found out that this is very higly improbable.
for e.g. for Earth'size planet to have a big moon is almost imposible. it really involves two planet crash. which means two planets have to form in same orbit. witch is close to impossible.
to have a massive magnetic field is also very impossible for small planets.


if a planet is a moon to a jupiter. its much much easier. - probable.

you don't have to have your own magnetic field - solar winds are deflected by host planets magnetic field.
host planet does not let its moon tilt go wild.
it is cracking the planets core allowing vulcanism and plate tectonics to accure on much smaller objects than Earth - sustaining rich atmosphere
it is protecting against asteroids and comets.

we have no reason to believe that jupiterlike planets will not have many big moons like it is here
we see that facelocking threat is not an often case in solar system moons
we know that gas gigants often drift inwords after planet formation and mey find its orbit near habitable zone.

if we could put our gas giants in habitable zone i have at least 2 moons airing for life - europa and titan, maybe titania... but it could be more than that

it is easy to detect jupiterlike planets. which means we know exact points where to concentrate our efforts in order to find the moons rather than looking for planets everywhere
 
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  • #2
calis said:
why planethunters and astrobiologists are concentrating on finding life on Earth like planet with an orbit around host star rather than on jupiterlike planets moon

They aren't. But planet hunters can only see extrasolar planets, not moons.
 
  • #3
Vanadium 50 said:
They aren't. But planet hunters can only see extrasolar planets, not moons.

and not just any planets, they have to be relatively large compared to their star. basically, we're only seeing the "jupiters" of other stars.
 
  • #4
keppler mission (loounched march 2009) which is the most expensive and promising planethunting device... is built to detect earthlike planets in an area as big as two constilations.

it is not explicitly pointed to known jupiters in habitable zone.

1. so i guess we are concentrating on planets rather than moons
2. yes we can detect Earth'size objects (data is flowing in ever day)
 
  • #5
calis said:
keppler mission (loounched march 2009) which is the most expensive and promising planethunting device... is built to detect earthlike planets in an area as big as two constilations.

interesting. I wasn't aware of that.
 
  • #6
calis said:
keppler mission (loounched march 2009) which is the most expensive and promising planethunting device... is built to detect earthlike planets in an area as big as two constilations.

it is not explicitly pointed to known jupiters in habitable zone.

1. so i guess we are concentrating on planets rather than moons
2. yes we can detect Earth'size objects (data is flowing in ever day)

Kepler works by measuring a dip in the brightness of a star as a planet passes in front of it. This is not very conducive to detecting moons circling a gas giant.
 
  • #7
Janus said:
Kepler works by measuring a dip in the brightness of a star as a planet passes in front of it. This is not very conducive to detecting moons circling a gas giant.

Yes that is what I am saying.
It is built so that it can detect planets not moons.

which in my opinion is incorrect.

I don't know how a moondetecting instrument should work...probably the same way - measuring the dip in solar radiation (light) of a star made by host planet and see if that dip is not linear and has some periodical fluctuations. if the instrument would zoom in any known jupiterlike planet in any constellation, whenever it or the host star is eclipsing. then the data could maybe reveal something

but anyhow the idea stays, living on moon is far more easier - in onther words - probable - in other words moons ought to be more frequently inhabited than planets.

http://upload.wikimedia.org/wikipedia/commons/c/cc/Exoplanet_Period-Mass_Scatter.png
this graph shows that there are a lot of known jupiters in habitable zone

we are all the time complaining that we keep finding only jupiters, but i believe - that is just what we need.
 
  • #8
calis said:
Yes that is what I am saying.
It is built so that it can detect planets not moons.

which in my opinion is incorrect.
Simply put: we are doing the absolute best we can. Planet detection is right at the very limits of our technology. Anything we see is a bonus.


Wait another ten years, till planet detection is as common as dirt, then we'll start getting picky about what kinds we want to concentrate on.
 
  • #9
The variation in light between a large planet eclipsing a star is very, very small. And it would be very^5 smaller for a moon eclipsing a star. You would have to know the orbit of the planet, and be able to look at the star just before and just after the planet eclipses the star in order to detect a variation in light output.

Heck the variation in light output is small for binary stars!
 
  • #10
I find this very, very, very hard to believe. Do you have any evidence for your claim?
 
  • #11
Your arguments are way too Earth-centric, and flawed even at that.

One example:
TESLACOILZAP said:
My logic ?
Intelligent life like us needs EYES
No they don't.

Dolphins are intelligent yet they live in an environment that is relatively opaque to visible light beyond a few dozen feet. They do quite well with sonar. Scorpions locate prey using vibrations through the ground. And, of course, bats...

You are looking at the whole scenario backwards. Life does not get to choose the planet it evolves on. It's not like life is going to say to itself "hm, this atmosphere is opaque, I guess I won't bother evolving beyond the bacterial stage."


If life got a start on a planet with an atmo that's opaque to visible light, it would just make do.
 
  • #12
TESLACOILZAP said:
...like us

perhaps i should of said " a naturally evolved technologically advanced species...like us"
What is not naturally evolved about dolphins, scorpions or bats?

OK, now you're talking about technologically advanced. You're changing the goal posts.

TESLACOILZAP said:
many times easier for a biped with two free arms and opposing thumbs , stero vision and hearing to build spaceships..than an octopus
On what do you base this?

TESLACOILZAP said:
im not Earth centric...the laws of physics and evolution tell us that our body shape is the easy way...thus these economic & efficient forms will be dominant numerically
On what do you base this?


TESLACOILZAP, you are simply saying stuff that makes sense to you and claiming it as obvious or inevitable. This is not how science works.
 
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  • #13
TESLACOILZAP said:
Imagine a telescope 100 times the power of hubble. Now imagine 100 of these in deep space orbit. The task of detecting & filtering light passing through the atmosphere of a moon 1000 light years away quite doable.

Yes we all have good imaginations. What does 'imagination' have to do with 'doable'?


This is a rhetorical question. You are not answering a question asked, you are off on a philosophical tangent.
 

What is the difference between life on the moon and life on a planet?

Life on the moon would be drastically different from life on a planet due to the moon's lack of atmosphere, extreme temperatures, and lack of water. Organisms would need to adapt to survive in these harsh conditions.

Can life exist on the moon?

It is possible that life could exist on the moon, but it would likely be very different from life on Earth. Some organisms such as extremophiles, which can survive in extreme environments, may be able to survive on the moon.

What challenges would organisms face on the moon?

Organisms on the moon would face challenges such as radiation exposure, extreme temperature changes, lack of oxygen, and lack of water. They would also need to adapt to the low gravity environment.

How would plants grow on the moon?

Plants would face numerous challenges on the moon including lack of nutrients, extreme temperatures, and lack of water. They would need to be specially adapted to survive in these conditions, such as using photosynthesis to produce their own nutrients.

Can humans survive on the moon?

Humans would face numerous challenges if they were to live on the moon. They would need to bring their own oxygen and water supply, wear protective suits to shield them from radiation, and adapt to the low gravity environment. It would also be difficult to grow food on the moon, making it challenging to sustain a human population.

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