Important Notice: Our web hosting provider recently started charging us for additional visits, which was unexpected. In response, we're seeking donations. Depending on the situation, we may explore different monetization options for our Community and Expert Contributors. It's crucial to provide more returns for their expertise and offer more Expert Validated Answers or AI Validated Answers. Learn more about our hosting issue here.
Fill-in targets provide a set of peer-reviewed targets to be used to fill in gaps in the pre-planned science timeline. They were first introduced during Cycle 5, and are a separate proposal category, distinct from ToO and regular non-ToO observations. Please see the next two questions for further details.
