3. The Hubble Space Telescope’s homepage

The most famous space telescope in history — a joint mission undertaken by NASA and the ESA — has its own website with loads of information on exoplanets, nebulae, stars, galaxies, and much more. You can sift through collections of thousands of photos, countless videos, and informative articles.

Hubblesite.org offers a lot of knowledge in one place. Whether you’re looking for quick facts on the telescope, its mission, or its science, or just the latest Hubble news, the telescope's online portal has you covered. The site also has educational resources to help making teaching the next generation about Hubble’s mission and astronomy as a science both easy and fun!

4. Cosmos: Possible Worlds

In 1980, Carl Sagan mesmerized the world when he hosted a humbling, captivating, and, most of all, accessible television series called Cosmos: A Personal Voyage. This show — written by Sagan, Steven Soter, and Emmy and Peabody Award-winner Ann Druyan (who married Sagan in 1981) — thoughtfully explored the wonders of the universe, as well as our place in it. (By the way, if you haven’t heard Sagan’s famous Pale Blue Dot monologue, do yourself a favor and take a few minutes to listen to it.)