Skip to main content

Subscribe to Smithsonian magazine and get a FREE tote.

Moon

Galileo's handwritten notes in a 1551 copy of Ptolemy's Almagest

Cool Finds

A Scholar Recognized the Inscriptions in the Margins of This Manuscript. The Scribbles Turned Out to Be Galileo’s Handwritten Notes

Found in a 16th-century copy of an ancient astronomy treatise, the annotations suggest that the trailblazing scientist studied Earth-centric models before lending his support to heliocentrism

A total lunar eclipse last year photographed from Kannur, India

The Eerie ‘Blood’ Moon Will Grace the Night Sky This Week, Thanks to a Total Lunar Eclipse

The orb will take on the spooky hue for about an hour on March 3 because of sunlight filtering through Earth’s atmosphere

Saturn's rings are surprisingly young

A Smashing New Proposal About Saturn’s History Might Explain Its Iconic Rings and Some of Its Odd Moons

A crash involving the planet’s largest moon, Titan, and a hypothetical moon may have triggered a curious sequence of events

Luna 9's landing was a pivotal moment in history.

Scientists Say They May Have Found a Long-Lost Lunar Lander—the First to Successfully Touch Down on the Moon 60 Years Ago

Data from a NASA lunar orbiter has helped researchers deduce two potential locations for a defunct Soviet spacecraft called Luna 9

An artist's impression of an asteroid

An Asteroid Might Slam Into the Moon in 2032—and Create a Fiery Flash That’s Visible to Earthlings, New Research Suggests

Currently, NASA estimates that asteroid 2024 YR4 has a 4.3 percent chance of hitting our lunar companion

A supermoon rises over Washington, D.C., on December 3, 2017.

The Year’s First Bright Supermoon and the Colorful Quadrantid Meteor Shower Coincide This Weekend

The dual celestial events will ring in the new year, although the luminous “wolf” supermoon may hamper skywatchers’ view of the shooting stars

Look up throughout the year to catch a wide array of astronomical sights.

Don’t Miss These Ten Celestial Events in 2026, From Aligned Planets to a Total Solar Eclipse

The upcoming year will offer a blood-red moon, spectacular meteor showers and the first glimpse of the sun’s corona since April 2024

Six infrared images of Titan created with data from NASA's Cassini spacecraft

Saturn’s Moon Titan May Not Have an Underground Ocean After All

A new analysis of data from NASA’s Cassini spacecraft may upend Titan’s status as an ocean world. But it might still have pockets of water within a slushy ice layer

A supermoon in December 2017

Look Up This Week to See the Bright ‘Cold’ Moon, the Last Supermoon of the Year

December’s full moon will reach peak brightness on Thursday, but it will look striking for the next few nights—especially when it’s just above the horizon

An artist's impression of the collision between the early Earth and Theia, which may have formed the moon

A Planet Slammed Into Earth 4.5 Billion Years Ago, Forming the Moon. The Projectile May Have Been Our Neighbor

Little is known about the long-destroyed moon-forming planet, Theia. But it may have been born in the inner solar system—just like Earth—a new study suggests

A clip from Georges Méliès' 1902 short film, A Trip to the Moon

In an Out-of-This-World Observation, a Museum Curator Filmed the Moon Getting Struck by Meteors—Twice

Lunar impacts could affect plans for future bases on the moon

A supermoon in July 2022

November’s Full Beaver Supermoon Peaks on Wednesday—and It Will Be the Year’s Biggest

Supermoons occur when full moons coincide with the moon’s closest position to Earth in its orbit

SpaceX's Starship test flight launches from Texas.

SpaceX Successfully Launches Giant Starship Rocket’s 11th Test Flight

The company will soon begin testing the third version of its rocket

The three missions launched on a SpaceX Falcon 9 rocket the morning of September 24.

‘Ultimate Cosmic Carpool’ Sends Three New Missions to Monitor Space Weather and the Protective Bubble Around Our Solar System

The spacecraft will map the boundaries of the heliosphere, study how Earth’s outer atmosphere reacts to solar activity and provide continuous monitoring of space weather

Quasi-moons follow heliocentric orbits, centered around the sun, that are similar to Earth's.

Cool Finds

Astronomers Say Earth Has a Newly Discovered ‘Quasi-Moon,’ a Companion That Shares Its Orbit Around the Sun

Researchers are discussing 2025 PN7, a small celestial body that’s following a similar orbital path to our planet’s without being gravitationally tied to Earth

New moons are only visible during solar eclipses. This visualization of a tiny sliver, for example, is technically a crescent moon.

What Is a Black Moon? The Unusual Sky Phenomenon Will Occur Later This Month, but Don’t Expect to See It

A seasonal black moon, to appear on August 22 or 23, is the third of four new moons within an astronomical season

This year, a nearly full moon will make observing the Perseids harder. Here, a meteor is seen on August 3, 2025, in Spruce Knob, West Virginia.

The Popular Perseid Meteor Shower Will Peak This Week—Here’s How to Watch, Despite a Bright Moon

A waning gibbous moon will impact viewing the shooting stars, but the famous meteor shower is still worth observing

Jim Lovell while training for the Apollo 13 mission

Jim Lovell, Apollo 13 Commander Who Thrived Under Pressure, Dies at 97

The space explorer was determined throughout his life, says Teasel Muir-Harmony, the curator of the Apollo Collection at the National Air and Space Museum

The Perseid meteor shower in 2023. Although the prolific shower is not currently at its peak, astronomers recommend catching a glimpse before the moon gets too bright.

How to Watch This Week’s Stunning Dual Meteor Shower and More Upcoming Celestial Events

You can catch meteor showers and a special lunar display early this week, and keep an eye out for the popular Perseids

The push and pull between the Earth and its moon impacts our planet's rotation.

Today Will Likely Be Shorter Than Usual, and It Will Happen Again in August. Here’s Why

Because of the moon’s position, Earth is rotating just over a millisecond faster than usual on a few days this summer

Page 3 of 23