The Woman Who Helped Us Measure the Universe In the early 1900s, measuring distances in space was one of astronomy’s greatest challenges. We knew there were other galaxies out there, but we had no reliable way to determine how far away they were. Enter Henrietta Swan Leavitt, an American astronomer whose brilliant discovery would forever… Continue reading Henrietta Swan Leavitt:
Tag: Space Science
The Parade of Planets:
A Guide to this Upcoming Celestial Event Looking out my window one recent night, I noticed the crescent moon with three other bright points of light trailing in an arc. I had often seen Venus and, less often, Mars and Jupiter. I hadn’t noted that arc before, though I must have seen it. What was… Continue reading The Parade of Planets: