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The ancient Greeks used Ptolemy's theory, based on circles, that was good enough for the accuracy needed at the time. Later Kepler in the 16th century discovered that an ellipse is a better model of a planetary orbit. In modern times it has been discovered that an ellipse is an approximation and that true orbits have no simple description. But the ellipse is a good enough model for many purposes.
What else can I help you with?
How many solar systems have exoplanets?
It is too premature to give percentages. Several hundred planets have already been found around other solar systems; but so far, mostly giant planets have been found, most of them larger than Jupiter.It is too premature to give percentages. Several hundred planets have already been found around other solar systems; but so far, mostly giant planets have been found, most of them larger than Jupiter.It is too premature to give percentages. Several hundred planets have already been found around other solar systems; but so far, mostly giant planets have been found, most of them larger than Jupiter.It is too premature to give percentages. Several hundred planets have already been found around other solar systems; but so far, mostly giant planets have been found, most of them larger than Jupiter.
Where are ExtraSolar planets found?
Extrasolar planets are planets found orbiting stars other then our own.
What region are most of the planets found?
Most planets are found in the Milky Way galaxy, which is part of the Local Group of galaxies. Within the Milky Way, planets are most commonly found in the habitable zone around stars, where conditions may be suitable for liquid water and potentially life to exist.
Do many stars have planets around them?
Yes, recent research has found that a large percentage of stars have planetary systems. It is now believed that planets are a common feature in our galaxy, with some stars possibly hosting multiple planets. The discovery of thousands of exoplanets in the last few decades has increased our understanding of the prevalence of planets in the universe.
How much exo-planets has been found?
There is 8 planets in our solar system now, becuase scientists no longer classify Pluto as a planet. There where about 400 planets found so making it about 399 so about 391 exo-planets have been found. Hope that answers your question!
Where can circles be found?
coins wheels planets and so on ...
Who found out that planets orbits around the sun?
leanardo davichi
Is our sun the only star that has planets orbiting around it?
No. Other stars have been found to have planets orbiting them.
How many crop circles have been found?
Hundreds of crop circles have been reported around the world. Many of these have later been found to be hoaxes but there still remain a percentage that have defied explaination.
What have they found on the planets?
the found different rock on the planets
How many planets orbit Ad Leonis?
To date (2009) no planets have been found around Ad leonis (GJ 388)
How many solar systems have exoplanets?
It is too premature to give percentages. Several hundred planets have already been found around other solar systems; but so far, mostly giant planets have been found, most of them larger than Jupiter.It is too premature to give percentages. Several hundred planets have already been found around other solar systems; but so far, mostly giant planets have been found, most of them larger than Jupiter.It is too premature to give percentages. Several hundred planets have already been found around other solar systems; but so far, mostly giant planets have been found, most of them larger than Jupiter.It is too premature to give percentages. Several hundred planets have already been found around other solar systems; but so far, mostly giant planets have been found, most of them larger than Jupiter.
What will cure dark circles around the eyes?
I have found some good tips in following link; it may be helpful for you.
Where are ExtraSolar planets found?
Extrasolar planets are planets found orbiting stars other then our own.
Are there more Stars or Planets?
there are more planets than stars because to every star there could have several planets
How many crop circles were found in England 2009?
There were 54 crop circles.
What latitude is the tundra found?
The tundra is typically found within the Arctic and Antarctic circles, which are located at around 66.5 degrees North and South latitudes, respectively.
