ABSTRACT
This chapter deals with the prominent features of exoplanets. Each exoplanet has its characteristic color and albedo spectrum detectable with standard UBVRI filters. Blue color of the Hot Jupiter HD 189733b indicates the possibility of tiny silicate particles in its atmosphere forming misty clouds that predominantly scatter blue light from the host star. Brightness of a planet is directly related to its albedo. Magnetic field associated with an exoplanet is detectable in the radio wave window. Plate tectonics of an exoplanet hold the key to its climate. Volcanic activity on the surface of an exoplanet could result from the tidal interaction with the parent star and is suggestive of the composition of the exoplanet. 55 Cancri e is supposedly a carbon-rich solid planet with a major proportion of it in the form of diamond! A star surrounded by an exoplanet with its own ring system similar to solar gas giants is referred to as a Mamajek’s Object. A detailed study of the pattern of insolation of an exoplanet is strongly symptomatic of the climate and hence habitability of the planet.
