<em>A. are telescopes that can take images of invisible energy</em>
<em>C. observe electromagnetic radiation that is blocked by our atmosphere</em>
<u>Explanation:</u>
Space observatories are the telescopes that are situated on the earth’s surfaces in the deep sea or the orbit. The observatories, therefore, help the astronauts to look and inspect the world in technical ways from the earth. This is because of the interference from the atmosphere planet. The observatories are usually complicated and expensive when comparing them with the primary telescopes that are commonly used. Although they are costly, they can operate for longhours, and they are not affected by any weather changes.
