Discover offers online banking, reward credit cards, home equity loans, and personal loans to help meet your financial needs. Register your Discover Credit Card, Banking, Home Loan, Student Loan or Personal Loan account for online access. Learn more about Discover credit cards and apply for the best one for you, whether you need cash back, miles, a student credit card or a secured credit card.

Understanding the Context

You're logged out We weren't sure if you left, so we logged you out of Discover.com to keep your account safe. Activate your new Discover card quickly and easily online to start enjoying its benefits. In geophysical terms, the Moon is a planetary-mass object or satellite planet. Its mass is 1.2% that of the Earth, and its diameter is 3,474 km (2,159 mi), roughly one-quarter of Earth's (about as wide as the contiguous United States).

Key Insights

The Moon makes Earth more livable, sets the rhythm of ocean tides, and keeps a record of our solar system's history. Explore NASA lunar science here. Live Science brings you the best moon facts and answers all of your lunar queries, from how did the moon form and whether the moon could ever be pushed from orbit to what is the "man in the... Track the moon phase today with our interactive moon phase calculator. Get details on the current moon phase and the next full moon date.

Final Thoughts

What is the moon made of, and how did it form? Learn about the moon's violent origins, how its phases shaped the earliest calendars, and how humans first explored Earth's only natural satellite half a century ago.