Discover the truth behind the Moon's dark seas. Learn how lunar maria formed from volcanic basalt, why they look different from highlands, and how to observe them with a telescope.
Learn how to identify the Moon's major surface features-craters, maria, mountains, and rilles-with simple observations. Understand how they formed and why they look the way they do.
Learn how to identify and understand the Moon's four main surface features-craters, maria, mountains, and rilles-formed by impacts and ancient volcanism. No telescope needed to start observing.