This time line detailing the international response to climate change provides a contextual entry point to the Essential Background. You can also use the links on the left-hand column under Essential ...

One of the Ancient World's Most Impressive Buildings I spent a year with the $550 smart telescope that's shaking up the astrophotography world – and this is what it’s capable of ...

Located in today's Iran, Persia managed to incorporate many groups into their empire by respecting individual cultures in exchange for tributes. In part 2, learn about the majesty of the Persians ...

Today, observatories, museums, educational institutions, and astronomy clubs around the world organize events in honor of Astronomy Day, making it a truly international occasion. Knowledge of such ...