[1] The cause of the dust trap, in this case a vortex in the disc's gas», has typical life spans of hundreds of thousand of years. (sciencedaily.com)
The regular number of this puppy differ towards the smaller sized Poodle kinds not just through their bigger size but additionally by way of their shorter typical life span,. (teacupmalteseguide.com)
[1] The cause of the dust trap, in this case a vortex in the disc's gas, has typical life spans of hundreds of thousands of years. (alma-telescope.jp)