Science, Tech, Math › Science Can You Balance an Egg on the Equinox? Test an Urban Legend About Eggs With a Science Experiment Share Flipboard Email Print Do you believe it is easier to balance an egg on end on the equinox? Test it!. Isabelle Rozenbaum, Getty Images Science Chemistry Activities for Kids Basics Chemical Laws Molecules Periodic Table Projects & Experiments Scientific Method Biochemistry Physical Chemistry Medical Chemistry Chemistry In Everyday Life Famous Chemists Abbreviations & Acronyms Biology Physics Geology Astronomy Weather & Climate By Anne Marie Helmenstine, Ph.D. Chemistry Expert Ph.D., Biomedical Sciences, University of Tennessee at Knoxville B.A., Physics and Mathematics, Hastings College Dr. Helmenstine holds a Ph.D. in biomedical sciences and is a science writer, educator, and consultant. She has taught science courses at the high school, college, and graduate levels. our editorial process Facebook Facebook Twitter Twitter Anne Marie Helmenstine, Ph.D. Updated March 06, 2017 The vernal equinox is the first day of spring in the northern hemisphere (first day of fall in the southern hemisphere), while the autumnal equinox is the first day of fall in the northern hemisphere (first day of spring in the southern hemisphere). Are you familiar with the urban legend that it's easier to balance an egg on end on the equinox than on other days of the year? Test it and see! The vernal equinox and autumnal equinox are the two times during the year when the sun crosses the celestial equator and the spin axis of the Earth points 90 degrees away from the sun. Why should this affect your ability to balance an egg on end? The premise is that aligning the gravitational pull of the Sun with that from the center of the Earth should somehow make it easier to balance any object. Test the Hypothesis: Can You Balance an Egg on the Equinox? Take a carton of eggs and try balancing the eggs on end. Can you stand any of them up (without resorting to tricks like putting salt under the eggs)? Can you stand eggs on their small ends as well as their large ends? Keep track of your results and repeat the process on the equinox. Do you note any differences? An easier hypothesis to test is: Eggs can only be balanced on-end on the equinox. If you can balance an egg any day except the first day of spring or fall, you've disproved the hypothesis. It's that easy! One thing I find neat about egg-balancing is that a balanced egg will hold its position until a vibration knocks it down. How long can you keep an egg standing?