What Planet has a crater on it named after the man known in his lifetime as Gustavus Vassa?
Equiano (crater) Equiano is a crater on Mercury. It has a diameter of kilometers. Its name was adopted by the International Astronomical Union in 1976. Equiano is named for the abolitionist writer Olaudah Equiano, who lived from 1750 to 1797.
Planetary nebula A planetary nebula, often abbreviated as PN or plural PNe, is a kind of emission nebula consisting of an expanding, glowing shell of ionized gas ejected from old red giant stars late in their lives. The word "nebula" is Latin for mist or cloud, and the term "planetary nebula" is a misnomer that originated in the 1780s with astronomer William Herschel because when viewed through his telescope, these objects resemble the rounded shapes of planets. Herschel's name for these objects was popularly adopted and has not been changed. They are a relatively short-lived phenomenon, lasting a few tens of thousands of years, compared to a typical stellar lifetime of several billion years.