Weekend Diversion: The astronomer who brought us the Universe (Synopsis)

“Her will tells nearly all. She left an estate worth $314.91, mostly in Liberty Bonds, with a few items such as a desk valued at $5. She never married and had few living relatives. She also left behind a legacy of a great astronomical discovery.” -Jeremy Bernstein, on Henrietta Leavitt

Today is International Women's Day, and to celebrate, I not only have a killer cover by Cat Power that gives an amazing amount of actual emotion to Oasis' bland-pop hit from the 1990s,

Wonderwall,

but a story that left perhaps the greatest legacy in all of astronomy. I can think of no better way to celebrate it than to highlight the life and work of the one astronomer -- however unsung she may have been during her own life -- who literally opened up the Universe to us.

Image credit: ESA/Hubble and Digitized Sky Survey 2. Image credit: ESA/Hubble and Digitized Sky Survey 2.

If all we were able to do was look up at the sky and see what we can see, no matter how powerful our instruments became, we would be extraordinarily limited in what we could learn about the Universe. But if we could know some intrinsic properties about what we were looking at, then simply by measuring things like how bright these objects appear, we could figure out the cosmic distance scale; all it would require is knowledge of a "distance indicator" or "standard candle."

Image credit: NASA/JPL-Caltech. Image credit: NASA/JPL-Caltech.

The very first one ever discovered -- by Henrietta Leavitt -- is not only still in use today, but taught us the galactic nature of the spiral nebulae and gave us the expanding Universe. Go read the whole story.

More like this

"When you run the marathon, you run against the distance, not against the other runners and not against the time." -Haile Gebrselassie Welcome to a very special Messier Monday, which just happens to be the twenty-first consecutive week we've taken a look at one of the 110 fixed, deep-sky objects…
"I am undecided whether or not the Milky Way is but one of countless others all of which form an entire system. Perhaps the light from these infinitely distant galaxies is so faint that we cannot see them." -Johann Lambert When we look out at the Universe, our view is pretty consistently dominated…
"Let the great world spin for ever down the ringing grooves of change." -Alfred Lord Tennyson Welcome back, for another Messier Monday here on Starts With A Bang! Each Monday, we've been taking a look at one of the 110 Deep-Sky Objects that make up the Messier catalogue, a mix of clusters, nebulae…
“That there were other worlds, invisible, unknown, beyond imagination even, was a revelation to him.” -Kim Edwards And every time two particles interact with one another, the Universe is forever different from how it was a moment before. Here at Starts With A Bang, this past week saw us explore a…

Was the distance to the SMC known at the time? If not the fact that the SMC was itself an Island universe distinct from the MilkyWay would have been a big deal.

By Omega Centauri (not verified) on 08 Mar 2015 #permalink

The sciences, and mathematics, have stories of women who did extremely important work but were never acknowledged for their contributions. Is there any feel for whether this is more common in one particular discipline than another?

Was the distance to the SMC known at the time?>/blockquote>
No.
The distance to the next δ-Cephei variable wasn't, either :)

By wereatheist (not verified) on 09 Mar 2015 #permalink

Dean, I feel as though the work of women was predominantly unacknowledged in the Physical Sciences, Astronomy being a significant stumbling block. Perhaps women's work was more acceptable in the biological sciences because there is a historical culture of female nurses? The statistics would be interesting to see.