<h2>Right answer: las estrellas</h2>
An astronomical observatory is a place chosen to <u>observe</u> with more precision the celestial phenomena, among which the observations to the stars (<em>estrellas</em> in spanish) are included.
In this sense, the Atacama Desert (Chile), is considered as the best place on Earth to observe the sky, due to its excellent climatic and geographical conditions, <u>low humidity and low light pollution</u>, which allow it to have more <u>clear nights per year</u>. It houses diverse astronomical facilities, among which are mainly optical observatories and radio observatories.
That is why scientists from various parts of the world, go to this area of Chile to <u>observe and study the stars</u>.
Therefore, the correct answer is b:
<h2>Científicos de todo el mundo van a los observatorios de Chile para estudiar <u>las estrellas.</u></h2>
