Astro Bob: How to prove the Earth is round
Do we really live on a big ball? Yes, of course! Here are 7 ways you can prove it for yourself.
Written By:
Bob King for the Duluth News Tribune | 12:43 pm, Nov. 10, 2020 ×
NASA s Deep Space Climate Observatory (DSCOVR) took this photo of Earth on Nov. 3, 2020. The United States, Mexico and part of Central America is at top with South America to the right of center. (NASA)
We all know the Earth is round. Not perfectly so but close enough. We live on an oblate spheroid, a slightly squashed sphere that s wider at the equator than around the poles. The difference between the planet s polar and equatorial diameter isn t much just 27 miles (43 km) and not apparent to the eye.