Henrietta Swan Leavitt they became an important part of the evidence that "spiral nebulae" are independent galaxies located far outside of our own Milky Way. Thus, Leavitt's discovery would forever change our picture of the universe, as it prompted Harlow Shapley to move our Sun from the center of the galaxy in the "Great Debate" and Edwin Hubble to move our galaxy from the center of the universe. Leavitt's discovery of a way to accurately measure distances on an inter-galactic scale, paved the way for modern astronomy's understanding of the structure and scale of the universe. The accomplishments of Edwin Hubble, the American
A Demon of Our Own Design A Demon of Our Own Design A Demon of Our Own Design: Markets, Hedge Funds, and the Perils of Financial Innovation (2007) is a book by veteran Wall Street risk manager Richard Bookstaber. The book is noted for its foreshadowing of the financial crisis of 2007–08. Bookstaber had a "a front-row seat" for such crises as the stock market crash of 1987 and the demise of Long-Term Capital Management, and his book is built around themes drawn from those experiences. The theme of the book is that the world financial system is vulnerable to singularities—disasters arising out of apparently trivial