How can you find out what scientists already know about a particular astronomy topic or object?
Searching the literature is an essential part of doing research. Reading the literature is different than reading a newspaper article.
Most coherent, developed, tested materials
Movie (21:54) on basics of astronomical literature searching (by Dr. Luisa Rebull, 2016)
Movie (15:57) on how to read scientific literature (by Dr. Luisa Rebull, 2016)
Movie (17:38) on a case study on how to read a scientific paper with a goal of getting data out. It was for one of my IC417 teams, so it uses a paper relevant to IC417. (by Dr. Luisa Rebull, 2016)
Less coherent materials
Literature searching worksheet (by Dr. Luisa Rebull, circa 2009 but updated slightly)