Daily cosmobite: astronomer’s birthday

Daily cosmobite: astronomer’s birthday

Published by Nick Lomb on April 28, 2014 1 Comment

28_Oort cloud_NASA_SpaceplaceDutch astronomer Jan Hendrik Oort was born on this day in 1900. He is best known for proposing that there are a large number of comets circling the Sun far beyond the outer planets. The Oort cloud, as it is now called, is the origin of most of the comets that pass through the inner region of the Solar System.

A sketch showing the Oort cloud surrounding the solar system. Courtesy NASA

Leave a Reply

One Response to “Daily cosmobite: astronomer’s birthday”

  1. April 28, 2014 at 6:19 am, Andrew James said:

    He might be famous for this, but his greatest work proved that the Milky Way galaxy rotates and was not static but dynamic in nature. He did this by analyzing the movements of high proper motion stars. This idea was first postulated in 1927 by Bertil Lindblad. Its great implication lead to understanding galaxy evolution constrained to the age of the universe.




The 'Observations' blog is run by the staff of Sydney Observatory which is located at Observatory Hill, The Rocks, in Sydney, Australia.

This site is for discussion purposes only and does not represent the official views of Sydney Observatory. Any views expressed on this website are those of the individual post author only. Sydney Observatory accepts no liability for the content of this site.

Please direct any correspondence about the content of the blog to:
observatory [at] phm.gov.au
and about web matters to:
web [at] phm.gov.au.