There are only certain intervals of time when life of any sort is possible in an expanding universe and we can practise astronomy only during that habitable time interval in cosmic history.

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• Plato

  Philosopher

  Thursday, Jan 01, 1970
  Thursday, Jan 01, 1970

• Thomas Jefferson

  3Rd US President

  Saturday, Apr 13, 1743
  Tuesday, Jul 04, 1826

• Henry David Thoreau

  Author

  Saturday, Jul 12, 1817
  Tuesday, May 06, 1862

• Robin Williams

  Actor

  Saturday, Jul 21, 1951
  Monday, Aug 11, 2014

• John Muir

  Author

  Saturday, Apr 21, 1838
  Thursday, Dec 24, 1914

• Pope Francis

  Thursday, Dec 17, 1936
  

• Michael Jordan

  Basketball Player

  Sunday, Feb 17, 1963
  

• Friedrich Nietzsche

  Philologist

  Tuesday, Oct 15, 1844
  Saturday, Aug 25, 1900

• Ralph Waldo Emerson

  Essayist

  Wednesday, May 25, 1803
  Thursday, Apr 27, 1882

• Albert Camus

  Author

  Friday, Nov 07, 1913
  Monday, Jan 04, 1960

• Ruth Bader Ginsburg

  Associate Justice Of The Supreme Court Of The United States

  Wednesday, Mar 15, 1933
  

• Samuel Taylor Coleridge

  Poet

  Wednesday, Oct 21, 1772
  Friday, Jul 25, 1834

• Aristotle

  Philosopher

  Thursday, Jan 01, 1970
  Thursday, Jan 01, 1970

• Les Brown

  Author

  Saturday, Feb 17, 1945
  

• Steve Jobs

  Entrepreneur

  Thursday, Feb 24, 1955
  Wednesday, Oct 05, 2011