apply suggestions from code review
apply suggestions from code review

Co-Authored-By: Stuart Mumford <1c8c08db85a36cc69d975124539be839dea91342@cadair.com>
OpenAstronomy/openastronomy.github.io,Cadair/openastronomy.github.io,Cadair/openastronomy.github.io,OpenAstronomy/openastronomy.github.io,Cadair/openastronomy.github.io,dpshelio/openastronomy.github.io,OpenAstronomy/openastronomy.github.io,dpshelio/openastronomy.github.io,dpshelio/openastronomy.github.io