 Here are the links to Hubble sites, white papers and other locations where I found the information contained in this 2021 review. These are also the places where you can go to begin your own research. Also, thanks to Jonathan Onsted, there is a How Far Away Is It Wiki available for anyone who wants to engage in conversations about this or any channel video. Here's a free online textbook called Astronomy that anyone interested in astronomy can use. And don't forget, every video has a document on the HowFarawayIsIt.com website containing all the text. Download and translate as needed. Let me call your attention to the index. It contains a link to the classroom aid video for every astronomical item in the entire How Far Away Is It video book. From accelerating space expansion to a zwicky transient facility, just click the link and see the video. Thanks for watching.