It’s #InternationalAstronomyDay, and to celebrate we have the next video from our Ancient Greeks bite-size series. This video features a Byzantine sundial-calendar, the second oldest known geared mechanism in the world. It follows an even older tradition of ancient Greek mechanical technology, revealing just how advanced the ancient Greeks were. You can learn more about the world’s oldest surviving geared mechanisms by visiting our free exhibition, Ancient Greeks: Science and Wisdom. Open until

For half a century, Astronomy Day has fueled enthusiasm for space exploration. Join the cosmic celebration with your students! Explore the upcoming solar eclipses, access activities and resources, and seize the opportunity to win PASCO Solar Eclipse Glasses and Free Wireless Sensors. Find more details here: https://bit.ly/3RB86kh | PASCO scientific | Facebook

This month marks more than 70 years of seeing Earth from space. Here's how the view of our planet has changed through history. | Nature

Happy Discovery Day (or Discovery Night, actually) to Neptune, eighth planet from the Sun! On the night of September 23-24, 1846, astronomers Johann Gottfried Galle and Heinrich Louis d’Arrest at the Berlin Observatory confirmed the existence of a planet beyond Uranus. Although Galle and d’Arrest made the observations, credit for the discovery of Neptune generally goes to French mathematician Urbain le Verrier, who predicted Neptune’s existence and calculated where it should be in the sky based