The past posts from the NASA site lead you down many a fascinating rabbit hole. Click on the "Discover the Cosmos" link at the NASA site to enjoy exploring!
The March 4, 2015, image from the NASA site of pillars and jets in the Pelican Nebula is particularly striking:
And this particular Rabbit Hole led me to the Rabbit Hole Mine in Black Desert, Nevada, (red pin below) near the Burning Man Festival site. Based on what I know about the Burning Man Festival, their proximity cannot be an accident!
The Rabbit Hole Mine is rich in sulphur, alunite, cinnabar, gypsum and opal.
The powers of ten may also provide a colorful journey from opals to nebulae . . .and back, via the rabbit hole.
Let me know your favorite past image on the NASA site. . .and do enjoy your trip down the rabbit hole. Please--come back!
Enjoy the ride,