Special Report

Life in the Cosmos

Exploring the mysteries of the universe

Chandra image of the Antenna Galaxy. X-ray: NASA/CXC/SAO/J.DePasquale; IR: NASA/JPL-Caltech; Optical: NASA/STScI

Life in the Cosmos

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.

How Astrophysicists Found a Black Hole Where No One Else Could

Astrolabes were astronomical calculating devices that did everything from tell the time to map the stars. This 16th century planispherical astrolabe stems from Morocco.

The Story of the Astrolabe, the Original Smartphone

CAMS results for November 28 to December 14 from 2010 to 2016. Each point is direction from which a meteor was measured to approach, with red showing faster meteors and blue slower ones.

Introducing the Global Effort to Map the Night Sky

Besides exceptional facial hair, what could these two gentlemen have in common?

The Hidden Connections Between Darwin and the Physicist Who Championed Entropy

The Search for Life

An image of the original 1970s Arecibo message.

These Space Scientists Want to Update Earth's Message to Extraterrestrials

Margaret Osborne

Webb’s 18 mirror segments can lock into the largest telescopic mirror humankind has ever built.

The Five Big Ways the James Webb Telescope Will Help Astronomers Understand the Universe

An artist's illustration of the planet K2-18b and another planet, K2-18c, that orbits closer to the parent star. Both planets orbit a red dwarf about 110 light-years from Earth in the constellation Leo.

Water Vapor Detected in the Atmosphere of an Exoplanet in the Habitable Zone

A natural color view of Titan and Saturn taken by NASA's Cassini spacecraft wide-angle camera on May 6, 2012, at a distance of approximately 483,000 miles (778,000 kilometers) from Titan.

Dragonfly Spacecraft to Scour the Sands of Titan for the Chemistry of Life

An artist's depiction of Earth during the Archean Eon, from 4 to 2.5 billion years ago, when life consisted of only single-celled microbes with no nucleus (prokaryotes). How these primitive organisms first formed from chemical reactions remains one of the greatest mysteries of science.

Searching for the Key to Life's Beginnings

Past, Present, Future

Astrolabes were astronomical calculating devices that did everything from tell the time to map the stars. This 16th century planispherical astrolabe stems from Morocco.

The Story of the Astrolabe, the Original Smartphone

Besides exceptional facial hair, what could these two gentlemen have in common?

The Hidden Connections Between Darwin and the Physicist Who Championed Entropy

Matthew R. Francis

An illustration shows the record-breaking supernova ASASSN-15lh as it would appear from an exoplanet about 10,000 light-years away.

Astronomers Have Found the Brightest Supernova Yet

Watch the Universe Evolve Over 13 Billion Years

The Andromeda Galaxy

What Does the Future of the Universe Hold?

Lawrence Krauss

How We Explore

CAMS results for November 28 to December 14 from 2010 to 2016. Each point is direction from which a meteor was measured to approach, with red showing faster meteors and blue slower ones.

Introducing the Global Effort to Map the Night Sky

Sedeer el-Showk

Telescope array

The Hunt for High-Energy Photons Takes Place From a Mountaintop in Mexico

Adam Mann

Astrophysicist Kip Thorne dared to dream of a machine to find gravitational waves.

The Detection of Gravitational Waves Was a Scientific Breakthrough, but What’s Next?

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.

These Dragonflies Helped an Astronomer Find Ghostly New Galaxies

A pigeon trap, on view at the Air and Space Museum, used by Nobel Prize winners Penzias and Wilson to remove the birds roosting in the radio antenna's large horn.

AT THE SMITHSONIAN

How Two Pigeons Helped Scientists Confirm the Big Bang Theory

Claudia Dreifus

Galaxies, Quasars, Clusters

The Hubble Space Telescope detected Earendel after homing in on a magnified streak of light boosted by a nearby galaxy.

Hubble Telescope Spots the Most Distant Star Ever Detected in Outer Space

Elizabeth Gamillo

Head-on collisions between galaxies like the one seen in Arp 143 (pictured) may be how rings of new stars form.

Hubble Space Telescope Captures Galaxies Caught in Triangular Tug-of-War

Elizabeth Gamillo

The celestial bodies are known as NGC 7764A and reside in the Phoenix constellation 425 million light-years away from Earth.

Hubble Space Telescope Snaps Stunning Photo of a Faraway Galactic Trio

Elizabeth Gamillo

Understanding the Cosmos

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.

How Astrophysicists Found a Black Hole Where No One Else Could

LIGO's founding fathers, from left: Rainer Weiss, Kip Thorne and Barry Barish. Not pictured: Ronald Drever

Meet the Team of Scientists Who Discovered Gravitational Waves

Jennie Rothenberg Gritz

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.

AT THE SMITHSONIAN

Stephen Hawking on Why Black Holes Are Worthy of Your Consideration