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The irregular satellites of the outer planets are interesting, as reported in this article, but my heart paused when I read “the medium-size Hale Telescope.” That historic 200-inch telescope was the largest in the world for almost 50 years. Incidentally, it’s on Palomar Mountain, not Mount Palomar. Jay M. PasachoffWilliams CollegeWilliamstown, Mass.
- Planetary Science
Moonopolies
Recently discovered tiny satellites, all orbiting the outer planets in strange paths, may shed new light on a critical last phase in the formation of the planets.
- Math
Cool Rationals
It’s curious how some classroom words, activities, or incidents can stick in your mind for years. I can still recall certain grammar rules from lessons long past, for example.
