Authors
Martin Braddock
Sherwood Observatory, Mansfield and Sutton, Astronomical Society, Coxmoor Road, Sutton-in-Ashfield, Nottinghamshire, Science4U.co.uk, Radcliffe-on-Trent, Nottinghamshire
© 2021 Martin Braddock, published by University of Information Technology and Management in Rzeszow
This work is licensed under the Creative Commons Attribution 4.0 License.