SPICA/ NALEDI FINAL aug 2021

https://earthsky.org/brightest-stars/speed-on-to-spica-the-15th-brightest-star/

 https://alansfactoryoutlet.com/wp-content/uploads/2021/02/44-closest-stars-how-they-compare-sun-6.png

https://archive.org/details/practicalastrono0000mill/page/199/mode/2up