How many planets have been dicsovered outside our solar system?
Question:
if any have, when were they photographed?
Answer:
As of today (..24 April 2007..) 227 extra-solar planets have been discovered. ==>http://vo.obspm.fr/exoplanetes/encyclo/c...
Extra-solar planet photographed ==>http://www.cnn.com/2005/tech/space/04/01...
It changes constantly,the only proof of other planets is the pull they have on the sun they orbit around
Countless planets have been discovered. Particularly noteworhy are Vulcan, which is in Orian's belt and Planet of the Apes, which is located somewhere near the big dipper. I am talking from my blackhole by the way.
I would like to say about 200, but I'm not sure of that. They can only be detected through redshift and blueshift, so none have been photographed.
A dozen or so planets have been found, roughly the size of Jupiter!
No photographs though.
The have found them using mathematics, by studying the "wobble" of a star due to the gravitational pull of a planet, or planets.
And the dimming of light as the planet passes in front of the star.
Billions. check out the following sites
Over 200 exoplanets have been announced as being discovered, based on a number of techniques that indicate a non-stellar object or objects are orbiting the over 160 stars where these indications have been found.
Since these planets are a lot further away than even Pluto, they have not been photographed:
- the star they orbit is so much brighter the planet is lost in the glare
- they are so far away that even our best telescopes only show the stars as small points of light, so tiny planets are not resolvable with our current instruments
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