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Weekend Diversion: The astronomer who brought us the Universe (Synopsis) [Starts With A Bang]
“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,
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.
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.
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.
Source: http://scienceblogs.com/startswithabang/2015/03/08/weekend-diversion-the-astronomer-who-brought-us-the-universe-synopsis/
