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Science / Technology & Space

An artist's impression shows two tiny but very dense neutron stars at the point at which they merge and explode as a kilonova.

What the Neutron Star Collision Means for Dark Matter

The latest LIGO observations rekindle a fiery debate over how gravity works: Does the universe include dark matter, or doesn’t it?

Behind Saturn's icy rings is the moon Tethys, illuminated by the planet's reflected sunlight.

How Scientists Engineered Cassini’s Final Demise

After a rich scientific life, Cassini went out in a blaze, becoming one with the planet it had revolved around for so long

The H.L. Hunley, a confederate Civil War era submarine, sits in its water tank at the Hunley Lab in North Charleston, SC.

One Scientist May Have Finally Figured Out the Mystery of Why a Civil War Submarine Sank

A Navy engineer used creative modeling and her knowledge of underwater explosions to tackle the century-old Hunley conundrum

The astronauts of "2001: A Space Odyssey" hide in a pod to discuss the troubling behavior of their spacecraft's artificial intelligence, HAL 9000. In the background, HAL is able to read their lips.

Ask Smithsonian

When We Go to Mars, Will We Have a Real-Life HAL 9000 With Us?

How generations of NASA scientists were inspired by an evil Hollywood supercomputer

NASA's Cassini spacecraft captures three of Saturn's moons—Tethys, Enceladus and Mimas—in this group photo.

Space Hub

How and When Did Saturn Get Those Magnificent Rings?

The planet’s rings are coy when it comes to revealing their age, but astronomers are getting closer

A visualization of the interior of Blue Origin's "New Shepard" space tourism rocket.

Here’s What to Expect on the First Tourist Flights to Space

Take a peek at plans for Blue Origin’s first space tourism rocket

An illustration of LHS 1140b orbiting its faint red star

New Research

Exoplanet Discovery Arrives in Time for New Telescope Technology

Astronomers call LHS 1140b one of the “best targets” for hunting liquid water with NASA’s James Webb Space Telescope

What thorny ethical issues await us once we make it to Mars? A composite image of the red planet, composed by processing about 1000 Viking Orbiter red- and violet-filter images have been to provide global color coverage at a scale of 1 km/pixel.

Think Big

When Humans Begin Colonizing Other Planets, Who Should Be in Charge?

The biggest threat humans pose to other worlds is what we don’t know—or what we think we know, but don’t

Unlike the Apollo spacecraft, Orion will have solar panels to help power longer space journeys, as shown in this concept art of the spacecraft orbiting Earth.

Ask Smithsonian 2017

What’s Really Changed—and What Hasn’t—About Getting Humans to the Moon

NASA’s Orion will combine vintage tech with massive advances in computing power and electronics we’ve made since 1972

The seven Earth-sized planets orbiting the dwarf star TRAPPIST-1.

Think Big

Scientists Spot Seven Earth-Sized Planets Orbiting a Nearby Star

This newly discovered solar system presents the best opportunity yet to study potentially habitable worlds, NASA scientists report

An infrared image of 47 Tucanae, a dense globular cluster of stars located roughly 16,000 light years from Earth. A new study has predicted that a black hole lies at its center.

Think Big

How Astrophysicists Found a Black Hole Where No One Else Could

A new method could help scientists peer inside universe’s densest star clusters to find undiscovered black holes

The Evpatoria radio telescope RT-70 and the Long Range Space Communications Center, which were used for one of the most ambitious efforts at extraterrestrial communication.

How a Couple of Guys Built the Most Ambitious Alien Outreach Project Ever

You might think it takes vast governmental resources to launch an extraterrestrial communication effort. Nope

The Washington Monument went through years of expensive restoration work following a 2011 earthquake.

NASA Responds to an S.O.S. of Historic Proportions

Rocket technology could save our (historic) structures from earthquakes

After a century in which black holes went from theoretical nuisances to undisputed facts, a new initiative at the Harvard -Smithsonian Center for Astrophysics will study them.

Think Big

Stephen Hawking on Why Black Holes Are Worthy of Your Consideration

A new Harvard-Smithsonian initiative will delve into the places in the universe where spacetime sags around massive objects

An iconic remnant of the space shuttle Challenger disaster, this flag-covered piece of fuselage was hidden away in storage until NASA's new memorial launched on June 27, 2015.

NASA’s Memorial Honors Lives Lost on the Challenger and Columbia Missions

The permanent exhibit at the Kennedy Space Center in Florida displays remnants of the shuttles and items from fallen astronauts

A shuttle astronaut's view of the International Space Station.

To Get Rid of Space Junk, Shoot It Down With Lasers

Proposals to send debris-targeting craft into orbit are piling up, and one mission may soon start test firing from the space station

Extreme Makeover: ISS Edition

How to give the International Space Station a little bit more room

Best Space Photos of the Week

These Cosmic Visions Include a Mars Ocean and a Supernova Quartet

The red planet’s deep blue sea and a rare Einstein cross feature among the week’s best space images

Dragonfly wings have a complex, rigid surface that is maintained by a network of veins. The subtle colors of this immature Black Meadowhawk are caused by sunlight reflecting off the not-quite transparent wings.

Think Big

These Dragonflies Helped an Astronomer Find Ghostly New Galaxies

A Yale scientist set out to capture the insect’s full lifecycle and ended up discovering hidden wonders of the cosmos

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