Boole - Ancestors & Descendants

Boole Crater on the Moon

Crater Boole & Planets

This view of crater Boole is shown courtesy of  satellite images at

Data Associated with Boole

Latitude: 63.7 degrees

Longitude: 87.4 degrees

Size: 63 kilometers


Page courtesy of Boole descendant Michael McCrohan

Crater Boole is named after George Boole, the mathematician who invented Boolean logic. It is at Latitude 64 degrees North, longitude 87 degrees West. It sits near the top left edge of the Moon as seen from Earth’s Northern Hemisphere; at the bottom right as seen from the Southern Hemisphere.

The Boole crater is very difficult to see for two reasons. Firstly it is only about 63 kilometres across (40 miles), and when you consider that the entire Moon is about 3500 kilometres across, crater Boole is tiny in comparison, and impossible to see without a telescope.

Secondly, crater Boole is right on the edge of the moon’s disc as seen from Earth, so it can only be seen under very favourable circumstances, when that edge of the moon happens to be slightly tilted in the right direction (an effect called libration). When it can be seen, it appears as a very thin elongated ellipse.

Crater Boole is in the company of some other very eminent mathematicians. Nearby are craters such as Pythagoras and Babbage.

In addition to the Boole crater, there are two Boole related minor planets.

Tracking of minor planets or asteroids has become important in recent years as astronomers realise the danger of one of them colliding with earth, as has happened in the past every few thousand years.  These are basically sizeable rocks hurtling around in space, that could do untold damage if they hit us.  The vast majority, when tracked, are found to be in orbits that could never intersect with earth.  As of 2009, with the help of automated computer systems, about 200,000 have been discovered, of which about 18,000 have so far been given names.

Minor planet number 2032  was discovered in 1970, and named Ethel, after Ethel Lilian Boole/Voynich, writer.  It is about 36 Km across, and far too small to be seen with the naked eye.

Minor planet number 17734 was discovered in 1998, and named Boole, after George Boole, mathematician, Ethel Voynich’s father.  It is even smaller than Ethel, only a few Km across, and also far too small to be seen with the naked eye.

Both these Boole related minor planets are orbiting the sun between the orbits of Mars and Jupiter, and unlikely ever to come near Earth, unless deflected from their orbits for some reason.