I listened to an explanation of gravitational waves on the news this morning. The announcer was comparing them to こんにゃく(konjac jelly). I didn’t quite get it. This helped:
Find out more in this article from Vox: “Scientists just detected gravitational waves. We’ve entered a whole new world for astronomy”
This looks like a 蚊取り線香 (mosquito coil), don’t you think?