Today is the Feast of the Epiphany. Another epiphany that occurred in January -- January 1, 1925 -- is celebrated and explored in a recently published book I'm reading now. Until that date, we humans didn't know exactly where we were. That day astronomers learned conclusively that the universe extends at least a million light years or more and faint clouds of light observed by the world’s largest telescope at the time twinkled from distant galaxies. Essentially, the date marked the universe’s discovery, science writer Marcia Bartusiak argues in her newly published history of early 20th century astronomy, The Day We Found the Universe, published by Pantheon Books.
I wrote a column last month about the important night sky light -- that of the Andromeda galaxy -- that enabled Edwin Hubble to make his important discovery that was formally announced on Jan. 1 in 1925, that our Milky Way home galaxy is just one of billions.