Both Colin and I were long-time friends of Dave Lane, who passed away last year. He was the author of a very nice planetarium program called Earth Centered Universe. As a tribute to Dave, I have taken over ECU and am now making it available free of charge. It is available from https://www.nova-astro.com (Diffraction Limited is now hosting the domain, so it forwards to a page on our main site.) For community-based technical support please go to https://groups.io/g/ecusers If you enjoy ECU, please consider making a donation to StarFinder - The David Lane Astronomy Outreach Program established by Dave and his wife Michelle Lane. https://www.smu.ca/giving/david-lane
I've just released an update to Version 6.21. A change was made to accommodate 3I/ATLAS - its orbital eccentricity is beyond the previously-allowed range!
