Sci-Fi Space Science Logo Intro
https://elements.envato.com/sci-fi-space-science-logo-intro-V93UMVW
Free 
Stellar – Astronomy Powerpoint Template
https://elements.envato.com/stellar-astronomy-powerpoint-template-2U3MYNB
Free 
Stellar – Astronomy Google Slides Template
https://elements.envato.com/stellar-astronomy-google-slides-template-4ARAG9F
Free