https://commons.wikimedia.org/wiki/File:Star-sizes.jpg
Encyclopedia Britannica (English and Spanish versions)
Great background knowledge written by authorities in each field.
https://school.eb.com/levels
https://escolar.eb.com/
https://moderna.eb.com/levels/academica
From school-none needed.
From home:
Username: asmlibrary
Science Reference Center (Ebsco)
Science Reference Center contains full text for hundreds of science encyclopedias, reference books, periodicals, and other sources. (Applied Sciences, Earth Sciences, Life Sciences, Physical Sciences, Scientists, and Space Sciences & Astronomy)
http://search.ebscohost.com
Username: asmschol
ImageQuest
Thousands of royalty-free images, all subject areas. Citations included in downloads.
https://quest.eb.com/
Username: asmlibrary
Your teacher has the passwords on her Google Classroom site.