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Earth's Moon

The only natural satellite of Earth.


Earth’s Moon February 19, 2016

Craters and Extinctions February 19, 2016


Earth February 10, 2016

Radio Programs

Moon and Saturn Light and dark on the lunar surface April 15, 2017

Moon, Jupiter, and Spica Making the Moon face our way April 11, 2017

Moon and Regulus Sneaking up on the celestial lion — after this. February 10, 2017

Moon and Planets Earth and the Moon move around January 3, 2017

Moon and Aldebaran Disappearing in the moonlight December 12, 2016

Moon and Aldebaran Going nose to nose with the bull November 14, 2016

Frosty Moon The “frosty” glow of the full Moon November 13, 2016

More Moon and Planets Sponging up some lunar water November 2, 2016

Moon and Saturn A vigorous debate about Selenites June 18, 2016

Moon and Aldebaran Building a moon in a hurry April 10, 2016

Good Librations Peeking at the far side of the Moon March 21, 2016

Moon and Companions Circling through the stars March 20, 2016

Moon and Aldebaran Diving into a famous lunar “sea” March 13, 2016

Fingernail Moon Moving at the speed of a fingernail March 10, 2016

Moon and Spica Filling a lunar “ocean” January 29, 2016

Moon and Companions Building a mound on the Moon — after this. January 6, 2016

Breaking Down Breaking down lunar soil December 13, 2015

Blood Harvest Super Moon Lining up names for the full Moon September 26, 2015

Moon and Spica Frozen in place in lunar skies July 21, 2015

Moon and Antares Digging up some lunar history June 1, 2015

Moon, Saturn, and Antares Heating up the Moon’s interior March 11, 2015

Moon and Regulus Settling the dust on the Moon February 3, 2015

More Moon and Jupiter The Moon stays active February 2, 2015

Moon and Companions A brilliant presence in the night sky January 15, 2015

Moon and Aldebaran A game of cat and mouse in the night sky December 31, 2014

Hailstorm The inner planets take a beating December 28, 2014

Moon and Jupiter Measuring the solar system with a ruler December 9, 2014

Moon and Regulus Locking the Moon in position June 30, 2014

Moon and Mercury Ghostly apparitions in the evening sky May 29, 2014

Moon and Mars Digging holes on other worlds May 9, 2014

Moon and Regulus Bright flashes on the surface of the Moon March 12, 2014

Moon and Companions Quartering the Moon February 20, 2014

Moon and Aldebaran Peeking at the Moon’s backside January 10, 2014

Moon and Spica Following the rhythms of the night November 27, 2013

Moon and Venus Paving the surfaces of two worlds October 6, 2013

More Moon and Venus Stirring up some lunar dust August 9, 2013

Water World Diving into lunar research July 16, 2013

A New Cycle Beginning a new lunar cycle May 23, 2013

Moon and Spica A small but vast astronomical gap May 20, 2013

Moon and Regulus Lining up some bright moonlight May 16, 2013

Moon and Jupiter Measuring the skin of the Moon April 13, 2013

Moon and Companions A bright highlight on the dark Moon March 27, 2013

Moon and Companions From leading light to a pale second January 31, 2013

Moon and Jupiter III Mixing up some lunar water December 25, 2012

Moon and Mars Visitors from other worlds December 14, 2012

Moon and Jupiter A chilly Moon for a chilly time of year November 27, 2012

Moon and Companions Taking a peek at the Moon’s backside November 9, 2012

Moon and Regulus Brightening up the Moon October 9, 2012

Moonwatching Moonlight on an autumn night September 21, 2012

Moon and Mars Prime real estate on other worlds September 18, 2012

Moon and Companions A traffic jam in the evening sky August 20, 2012

Moon, Jupiter, and Aldebaran The Moon takes a pounding August 9, 2012

Lunar Secrets New secrets from old moonrocks June 11, 2012

Back to the Moon(rocks) New discoveries from old rocks June 10, 2012

Moon, Mars, and Regulus Dark ice at the Moon’s poles May 27, 2012

Happy Coincidence A beautiful scientific coincidence May 17, 2012

Moon and Mars Crowded skies above the Moon April 30, 2012

More Moon, Saturn, and Spica A celestial yin and yang March 9, 2012

Moon and Mars Historic monuments on another world February 8, 2012

Moon and Companions Reflections on a quarter Moon January 14, 2012

Featured Images

Full Moon behind the Wisconsin state capitol, September 2015

Bright Moon November 13, 2016

Venus, Mercury, and the earthshine-illuminated crescent Moon

Lighting the Shadows May 30, 2014

Lunar Reconnaissance Orbiter view on lunar north polar regions

Top o' the Moon March 19, 2014

GRAIL map of lunar surface gravity

Lunar Lumpiness April 14, 2013

Gravitational map of the Moon compiled by the GRAIL mission

Lunar Attraction December 15, 2012

Apollo 17 at the rim of Shorty Crater, December 1972

Back to the Moon(rocks) June 11, 2012

Dark lunar features are named seas or oceans

Split Personality February 9, 2012

Earth's atmosphere distorts the Moon as seen from the International Space Statio

Squashed Moon January 17, 2012

Artist's concept of GRAIL spacecraft measuring the Moon's gravitational field

Lunar Arrival December 30, 2011

Map of the Moon's gravitational field

Lunar Lumpiness September 6, 2011

Earth and Moon from International Space Station

Blue Moon? March 21, 2011

Apollo 14 commander Alan Shepard poses with the American flag on the Moon

Long Journey February 6, 2011

Lunar crater gouged by Apollo 14 booster rocket

A Big Whack February 4, 2011

Just Hanging Around January 11, 2010