Mars is Red
2017 photo by Kevin Gill
Creative Commons License
https://creativecommons.org/licenses/by/2.0/
Clip art
Edwin Hubble
https://creativecommons.org/licenses/by-nc/2.0/
He and Einstein were pipe smokers.
Hubble Space Telescope
Launched in 1990
NASA image
Image from www.bigstock.com
Comets
Clip art of Halley's Comet
Image from www.dreamstime.com