Weekly random links [43+44/52] 2020

• https://petapixel.com/2020/10/23/this-insane-2-5-gigapixel-image-of-the-orion-constellation-took-five-years-to-complete/
• https://leimao.github.io/blog/bashrc-VS-profile-VS-bash_profile/
• https://www.themusiclab.org/quizzes/td