A Sunday school teacher asked her little children, as they were on the way to church service,
"And why is it necessary to be quiet in church?"
One bright little girl replied, "Because people are sleeping."
Forest Ray MoultonBorn 29 Apr 1872; died 7 Dec 1952 at age 80.American astronomer who collaborated with Thomas Chamberlin in advancing the planetesimal theory of the origin of the solar system (1904). They suggested filaments of matter were ejected when a star passed close to the Sun, which cooled into tiny solid fragments, “planetesimals.”Over a very long period, grains collided and stuck together. Continued accretion created pebbles, boulders, and eventually larger bodies whose gravitational force of attraction accelerated the formation of protoplanets. (This formation by accretion is still accepted, but not the stellar origin of the planetesimals.) Moulton was first to suggest that the smaller satellites of Jupiter discovered by Nicholson and others in the early 20th century were captured asteroids, now widely accepted. |
