Stay up to date with notifications from The Independent

Notifications can be managed in browser preferences.

How a planetarium show led to a cosmic breakthrough

The Oort Cloud is now thought to resemble a spiral
The Oort Cloud is now thought to resemble a spiral (David Nesvorny et al.)
  • Scientists at the American Museum of Natural History discovered the true shape of the Oort Cloud, a region far beyond Pluto, while preparing a planetarium show called “Encounters in the Milky Way”.
  • The inner section of the Oort Cloud, which is made of billions of comets, was found to resemble a bar with two waving arms, similar to the Milky Way galaxy.
  • The spiral shape was identified by experts when fine-tuning a scene featuring the Oort Cloud, which is filled with icy relics.
  • This discovery challenges the long-held belief that the Oort Cloud was shaped like a sphere or flattened shell.
  • Researchers published their findings in The Astrophysical Journal, noting that this discovery marks a significant shift in understanding the outer solar system.
In full

Thank you for registering

Please refresh the page or navigate to another page on the site to be automatically logged inPlease refresh your browser to be logged in