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Jupiter Neptune
The planet that most extrasolar planets resembles Jupiter.
Jupiter(apex)
Most of the confirmed Exoplanets are larger gaseous planets with large masses. These are easier to detect and confirm due to their size. They most resemble Jupiter, although many are thought to be much larger than our largest planet.
Mars
The inner planets such as Mars, Earth or Mercury. these are too small to identify in other systems and too close to the star.
Planets are considerably smaller than their parent stars, also they emit no light and are very close to the star. With all this combined, separating between the two with a telescope is very difficult.
That it is Saturn's biggest moon and it has an atmosphere.
Its simple! They use telescopes instead!
light from the they orbit makes it difficult to locate extrasolar planets with telescope
