Final answer:
Astronomers have difficulty viewing planets orbiting other stars due to their distance, being covered by the stars, and their lack of reflective light.
Step-by-step explanation:
Astronomers have difficulty directly viewing many planets orbiting other stars due to a few reasons. Firstly, the planets are often too far away, making it challenging to see them with current telescopes. Secondly, the planets are typically covered up by the stars they orbit, making it difficult to distinguish them from the bright light of the stars. Lastly, the planets themselves do not produce their own light and rely on reflecting light from the stars, so if the amount of reflected light is too low, the planets become even harder to observe.
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