A tow car for the children's “Grand Prix” races which take place in a parking lot in Livonia, Michigan a suburb of Detroit, circa 1955. (Photo by Three Lions/Getty Images)
Chinese-American actress Bai Ling attends “The Key” screening at The Real Experimental Film Festival at Laemmle's Music Hall on November 21, 2014 in Beverly Hills, California. (Photo by Barry King/WireImage)
A woman cools off after taking a traditional steam bath (banya) at Sergei Benke's homestead in the village of Bobrovka, Tarsky District in Omsk Region, Russia on December 11, 2020. (Photo by Sergei Malgavko/TASS)
Ingrid Landmark Tandrevold of Norway shoots during the women's 10 km pursuit race at the Biathlon World Cup in Hochfilzen, Austria, Saturday, December 19, 2020. (Photo by Matthias Schrader/AP Photo)
A woman sells props outside a church on as members of India's Christian community celebrate Christmas eve in Mumbai, India, December 24, 2020. (Photo by Francis Mascarenhas/Reuters)
Sumo wrestlers in their women's match at the 2021 Russian Sumo Championship at Ak Bars Wrestling Palace in Kazan, Russia on February 14, 2021. There are over 6,000 sumo wrestlers in Russia. (Photo by Yegor Aleyev/TASS)
Kyuta Kumagai, 10, wrestles with a boy the same age as him, during a training session at Buddy acL Ariake's wrestling club in Tokyo, Japan, August 22, 2020. (Photo by Kim Kyung-Hoon/Reuters)
Our moon is a pretty big object. It's big enough to be a respectable planet in its own right, if it were orbiting the sun instead of the Earth. (Actually, it is orbiting the sun in a nearly perfectly circular orbit, that the Earth only slightly perturbs... but that's a topic for another day.) The Moon is a quarter the diameter of the Earth. Only Pluto has a satellite that is larger, in proportion to the size of the planet it orbits.