Description: [caption id="" align="aligncenter" width="385" caption="A Young Pulsar Shows its Hand, Smithsonian Astrophysical Observatory"][/caption] On Friday, April 3, the Chandra X-ray Observatory released a new image (with 10 times more data) of supernova B1509 which is now available on the Smithsonian Flickr Commons photostream. Chandra orbits the earth every 2.5 days capturing images
Description: [caption id="" align="aligncenter" width="442" caption="Group photograph of Smithsonian Astrophysical Observatory employees, including Florence Meier Chase, fifth Secretary of the Smithsonian Institution (1928-1944) Charles Greeley Abbot (second from the left), M. Agnes Neill, Earl S. Johnston, Robert Weintraub, Anne Lucka, William Hoover, Edward D. McAlister, and unidentified
Description: The term “personal equation” came into use in the 19th century as scientists found that observers have inherent biases: some anticipate events, and some report events after they have occurred. Recognition of the problem led to a spate of personal equation instruments: some measured biases of this sort, and some reduced the effect of personal errors. Most of these
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