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Answer:
Extrasolar planets are very dim light sources compared to their stars. At visible wavelengths, they generally have less than a millionth of the brightness of their parent star. It is extremely difficult to detect this type of dim light source, and in addition, the parent star has dazzling light that almost makes it impossible.
Answer:Extrasolar planets are difficult to detect directly because they are small when viewed from Earth and light from the stars near them are brighter than they are
Explanation:An exoplanet or extrasolar planet is a planet outside the Solar System. The first possible evidence of an exoplanet was noted in 1917, but was not recognized as such. The first confirmation of detection occurred in 1992. This was followed by the confirmation of a different planet, originally detected in 1988. In addition to their tiny sizes, the light from the stars near the planets is much, much brighter than the planets themselves