阅读下面短文，从方框中选择合适的词填入空白处，每词限用一次。
meteoroid sunspot comet gravity wave solar flare observatory radio telescope radar astronaut space scientist
Last night, I visited the local ___ with my astronomy club. Through the large telescope, we saw a ___with a faint tail moving slowly across the sky. The guide explained that these icy bodies originate from the outer solar system. He also showed us a dark patch on the sun’s surface called a___, which is caused by intense magnetic activity. We learned about___, which are small rocks that become shooting stars when they burn up in the atmosphere. He mentioned that a ___can release as much energy as billions of hydrogen bombs and can disrupt communications on Earth. Scientists recently detected a ___from two merging black holes using advanced instruments. The facility also houses a ___that detects radio waves from distant galaxies and helps us see through cosmic dust. They use ___to track near-Earth asteroids and monitor space debris. The guide told us about his cousin, a trained ___who has flown on the Space Shuttle twice. Another relative is a ___who analyzes data from space missions and searches for exoplanets. I left feeling inspired to learn more about the universe.