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Originally posted by MystikMushroom
Wait, we can see light from a galaxy 10 billion light years away....and we can't get a visual on an exoplanet 100 light years away?
Am I missing something?
Originally posted by wildespace
Originally posted by MystikMushroom
Wait, we can see light from a galaxy 10 billion light years away....and we can't get a visual on an exoplanet 100 light years away?
Am I missing something?
Yes, you (and k1k1to) are missing a thing called angular resolution. Compared to galaxies and nebulae, exoplanets are extremely small. It's like comparing a grain of sand with mountains. You can see a mountain from many miles away, but will have a hard time seeing a grain of sand from a few meters away.
Another factor is that exoplanets orbit close to their parent star, and the star's light completely drowns out the reflected light from the planet. I think there are only a couple of cases where a planet has been observed directly.
To k1k1to I'd like to say, get a decent telescope and see for yourself. A lot of astronomical discoveries over the centuries have been done by amateurs who even built their own equipment.
Originally posted by k1k1to
reply to post by smyleegrl
why dont they look into our OWN galaxy and its surrounding "earth like" planets?
i say this is BS
Originally posted by Arbitrageur
Who says they aren't?
Originally posted by k1k1to
why dont they use the technology to peer into our own galaxy and its many earth like planets that it contains?
Astronome rs have discovered hundreds of planets orbiting other stars, but only a few have been seen in photographs
Astronomers have discovered more than 850 planets orbiting other stars. These exoplanets are found using a variety of techniques, but most are indirect—we see the effect of the planet on its host star, but we don’t see the planet itself.
However, a very few handful have actually been directly detected—small sparks of light visible next to the brilliant spotlights of their stars. On this page are pictures all the exoplanets we’ve been able to see so far, including other solar systems, and some planets caught in motion as they orbit their parent stars.
Edit to add:
To show the difficulty of finding Earth like planets, here is a picture of Earth taken from the edge of our own solar system, it's only about 0.12 pixel so we can't even see it:
en.wikipedia.org...:Solar_System_Portrait_-_View_of_the_Sun,_Earth_and_Venus.jpg
When it's this hard to see Earth even in our own solar system, you should get some idea how hard it might be to see it from a distant solar system.
In the photograph, Earth lies in the center of one of the scattered light rays resulting from taking the image with a small angle between the Sun and the Earth. Earth takes up less than a single pixel (only 0.12 pixel in size as referred to by NASA).
edit on 29-1-2013 by Arbitrageur because: clarification