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This group contains content from Principles of Physics by OpenStax. Included are scores of spaced-repetition flashcards, organized by chapter, linked to specific relevant locations in the textbook. We call these unique flashcards "Recalls."
We recommend that you read this fantastic free book to learn astronomy and then use iDoRecall's flashcards to remember what you've learned. When you practice memory retrieval, if you struggle to recall the answer, click the source link and the textbook will open at the precise relevant location so that you can refresh your memory in the context where you learned it. We invite you to join our dedicated Astronomy Facebook group.
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This book is licensed by OpenStax under the Creative Commons CC-BY 4.0 license. Access the book for free at: openstax.org/subjects.