1913 – Dr William David Coolidge received his patent for improvements in tungsten and methods for making filaments in incandescent lights. It made light bulbs last a lot longer. Too bad that in 1928, GE got a court to declare the patent was not an invention.
1924 – Astronomer Edwin Hubble announced that he had found stars in the spiral nebula Andromeda, and using Leavitt’s formula measured them as 860,000 light years away proving Andromeda was a separate galaxy. He would go on to find a dozen more galaxies.
Read Tom’s science fiction and other fiction books at Merritt’s Books site.