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Our Moon

Earth's companion is so large and fascinating that geologists count the Moon as one of the solar system's "terrestrial planets." In fact, it was probably born from Earth, after a Mars-sized body collided with the proto-Earth, in a collision so violent that the Moon that coalesced from the leftover fragments was entirely (or almost entirely) molten. We can tell this story of Earth and the Moon's creation thanks to our analysis of the rocks returned to Earth by the Apollo astronauts, Luna landers, and chance discoveries of lunar meteorites. New laboratory techniques yield new discoveries every year even though no samples have been collected from the surface of the Moon since 1972.

In the years since the end of the space race between the United States and Russia, many other nations have sent robotic spacecraft to orbit the Moon as a first step in their planetary exploration: Japan, the European Space Agency, India, and China. Likewise, many people see a staging station on the Moon as a necessary first stepping stone toward sending humans on missions to asteroids or Mars. Thanks to the combined data from lunar orbiters from all nations we know that there is water stored in lunar soil and that there are permanently sunlit peaks at the lunar poles, providing for two basic needs of human settlements: water and power. We can go back to the Moon; but who will make the effort?

Recent Blog Articles About the Moon

Postcards from Clementine

Posted by Bill Dunford on 2013/02/25 12:44 CST | 4 comments

Nineteen years ago this month, the Clementine mission sent some amazing views from the moon.

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PlanetVac: Sucking Up Planetary Regolith

Posted by Bruce Betts on 2012/10/30 02:27 CDT | 3 comments

Learn about the Planetary Society’s newest project: PlanetVac, with Honeybee Robotics, aims to prototype and test in a huge vacuum chamber a new way to sample planetary surfaces that could be used for sample return or for in situ instruments.

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Planetary Society Weekly Hangout, Thu Jan 31 1200PT/2000UT: Sarah Noble on lunar science and working for NASA HQ

Posted by Emily Lakdawalla on 2013/01/31 02:00 CST

We welcomed Sarah Noble to our weekly Google+ Hangout. Sarah is a lunar geologist and a civil servant working in the Research & Analysis program at NASA Headquarters, and has recently been named Program Scientist for the LADEE lunar mission.

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Planetary Society Advent Calendar for December 25: Double planet

Posted by Emily Lakdawalla on 2009/12/24 11:32 CST

To those of you who celebrate the holiday, merry Christmas! I hope Santa was good to you.

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Planetary Society Advent Calendar for December 14: The Moon

Posted by Emily Lakdawalla on 2009/12/14 11:09 CST

The Moon is the most familiar of the objects in the heavens.

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Planetary Radio: Don't Step in That Puddle!

Posted by Mat Kaplan on 2013/07/01 06:18 CDT

The Planetary Science Institute's Amanda Hendrix is the guest for our July 1 episode. She finds water in the least likely places, including Luna.

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Planetary discovery over the past quarter century

Posted by Steven Hauck on 2016/12/20 10:01 CST

2016 marks the 25th anniversary of the creation of what has become one of the primary venues for the publication of research in planetary science: the Journal of Geophysical Research: Planets. This occasion is a good opportunity to look back at what we have learned in this era of expanded exploration and to try to take a peek at the future.

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Palomar image of crater Cabeus after LCROSS impact

Posted by Emily Lakdawalla on 2009/10/09 10:43 CDT

Here's the sharpest optical image shown today of the Moon, from Palomar Observatory.

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One month, one journal, so many missed space stories!

Posted by Emily Lakdawalla on 2010/06/24 10:53 CDT

Or: Emily reads you the table of contents of Icarus.

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One Day in the Solar System

Posted by Bill Dunford on 2013/04/08 09:12 CDT | 4 comments

Dispatches from five different worlds--all sent by robotic spacecraft on the same day.

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