Arty Astronaut is a pretty engaging and site that students can use to “explore” the solar system. It’s accessible to Intermediate English Language Learners.
Unfortunately, they also have a fair number of useless arcade-style games that could prove tempting to students. Nevertheless, it will still be worth a visit.
The site also says they’ll be creating other similar websites on dinosaurs and firefighters.
I’ve placed the link on my website under Planets and Space.