New earth

The camera will take the picture of the planet, but that image that we see now, is 20 years in the past, as that is how long it took the light to get to us... or something like that.
 
diesel said:
If a camera uses light to take a picture and it will take light 20 years to get there how do they get that image in such a short space of time?
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You did not just say that? :D

1. I don't think they used a normal optical camera to snap a pic, object is to far away. Probably a radio telescope and then it will still probably not be 'visible' but they can deduce it's properties from its orbit, size & influence on neighbouring objects. The image you saw was an artists impression.

2. When you take a picture of an object (any object, a tree, the moon, stars) you are capturing the light that has already been reflected off or radiated by the object which could be a minute fraction of a second ago for a tree, 1.3sec for the moon, 8min20sec for the sun, Alpha Centauri star 4.37yrs. So the light you observe from Alpha Centauri now actually left that start 4.37yrs ago, in other words you are looking into the past so to speak.

3. When you take a picture it's not like the light leaves the camera, bounces of the surface and travels back.
 
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diesel said:
If a camera uses light to take a picture and it will take light 20 years to get there how do they get that image in such a short space of time?
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What's going faster? A red car doing 120km/h or a blue car doing 120km/h?
 
Datura said:
What's going faster? A red car doing 120km/h or a blue car doing 120km/h?
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:D reminds me of that thread about the truck with the bigger wheels and the normal car both doing 120km/h, that dude kept on arguing. Best thread ever on this forum!
 
ponder said:
:D reminds me of that thread about the truck with the bigger wheels and the normal car both doing 120km/h, that dude kept on arguing. Best thread ever on this forum!
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Yeah, that was one seriously messed up thread!

How does the mass of this rock planet and orbiting speed effect the gravity?
 
Datura said:
How does the mass of this rock planet and orbiting speed effect the gravity?
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It's orbiting distance&mass has an effect on other planetary objects and based on that effect they can estimate it's properties, similar to how they detect black holes etc. See below as it also applies.

As for mass and gravity I will use wiki, but it basically boils down to Newtons laws (& Einteins General Relativity) you get taught in school:
http://en.wikipedia.org/wiki/Gravitation#Earth.27s_gravity
Every planetary body (including the Earth) is surrounded by its own gravitational field, which exerts an attractive force on all objects. Assuming a spherically symmetrical planet (a reasonable approximation), the strength of this field at any given point is proportional to the planetary body's mass and inversely proportional to the square of the distance from the center of the body.
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ponder said:
At 3-4 times the mass of the earth gravity is going to be a real biatch. I don't think humans can live in a constant 3-4G environment. No woman would move there as their weight would be a major issue for them :D
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Fighter pilots regularly hit 9+ Gs without long-term ill effects, and the human body is remarkably adaptable. Our bodies would evolve to conform to that gravity, which would mean any humans there would become shorter and wider, although their overall body mass would probably be significantly less than ours. (Think dwarfism.)
 
ponder said:
It's orbiting distance&mass has an effect on other planetary objects and based on that effect they can estimate it's properties, similar to how they detect black holes etc. See below as it also applies.

As for mass and gravity I will use wiki, but it basically boils down to Newtons laws (& Einteins General Relativity) you get taught in school:
http://en.wikipedia.org/wiki/Gravitation#Earth.27s_gravity
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Thanks. Yet another subject I am clueless at! :D
 
The_Assimilator said:
Fighter pilots regularly hit 9+ Gs without long-term ill effects, and the human body is remarkably adaptable. Our bodies would evolve to conform to that gravity, which would mean any humans there would become shorter and wider, although their overall body mass would probably be significantly less than ours. (Think dwarfism.)
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Hitting 9Gs for short intervals is not a problem (assuming you are wearing G-suite). Evolution does not happen overnight. If your environment changes to rapidly for you to evolve species usually die out. Going from 1G to 4G on a permanent basis is going to be heavy on your body, all your muscles (incl heart) will have to work much harder. I don't know what other effects gavity will have on your organs etc but there must be plenty. If we look at altitude for example most woman cannot have children above a certain altitude, only those that have adapted over thousands of years in places like the Andes or Himalayas posses the ability. Us humans are pretty fragile if you ask me.
 
Maybe thats the planet we humans came from because basically we f&@ked it up. Now we going back. 'Planet of the apes' come to mind.
 
diesel said:
If a camera uses light to take a picture and it will take light 20 years to get there how do they get that image in such a short space of time?
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This will will tickle your noodle. Some of the stars we see in the sky have died off thousands of years ago and are no longer there! :D
 
Nothxkbi said:
This will will tickle your noodle. Some of the stars we see in the sky have died off thousands of years ago and are no longer there! :D
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I think you might have just killed his noodle :D

Edit: Don't they teach science in school any more?
 
It will be a good planet to train our athletes Goku style xD
 
ponder said:
I don't think you need astronomy classes to learn about the properties of light, that's plain old physical science.
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Agreed, but astronomy makes it so much more interesting. :D

And don't forget that nowadays science isn't a compulsory subject. Heck when I took HG science in high school a decade ago there was sod-all about light in the curriculum. In fact I think I learned more about light in my grade 8 geography class than in my grade 12 science class...
 
The_Assimilator said:
Agreed, but astronomy makes it so much more interesting. :D

Heck when I took HG science in high school a decade ago there was sod-all about light in the curriculum.
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So nothing about wave–particle duality, refraction and all that other stuff?
 
i was no good at biology at school so tell me if there was a big bang in the universe and all things started from there would that specific space/place in the universe be void of stars or be like a black hole or something? my thinking is there should be a black space there as everything is moving away from that point.
 
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