If there’s a through line in Sydney Dolan’s pursuits, it’s a fervent belief in being a good steward — both in space and on Earth.As a doctoral student in the MIT Department of Aeronautics and Astronautics (AeroAstro), Dolan is developing a model that aims to mitigate satellite collisions. They see space as a public good, a resource for everyone. “There’s a real concern that you could be potentially desecrating a whole orbit if enough collisions were to happen,” they say. “We have to be very thoughtful about trying maintain people’s…