September 23 in history — On This Day

1846

Galle and d’Arrest identify Neptune at Berlin Observatory

On September 23, 1846, Galle and d’Arrest identified Neptune at Berlin Observatory.

Read the story →

This Week in History

SEP 18 · 1991
Discovery Returns from an Atmospheric Research Mission

War & Conflict

All War →

SEP 10 · 1976

An Indian Airlines flight is diverted to Lahore

Space

All Space →

SEP 25 · 1992

Mars Observer Launches Toward the Red Planet

Technology

All Technology →

SEP 26 · 1981

The Boeing 767 Takes Flight for the First Time

History

View all →

SEP 26 · 1983

Stanislav Petrov Assesses a False Nuclear Alarm

Crime & Justice

View all →

OCT 10 · 1933

Seven Lives Lost: The Unsolved Mystery of United Air Lines Flight 23

1988
An Ovechkin family group hijacks Aeroflot Flight 3739

Science

View all →

1846

Galle and d’Arrest identify Neptune at Berlin Observatory

Medicine & Health

View all →

1846

Ether Day: The Demonstration That Changed Surgery

Nature & Disasters

View all →

Black-footed ferret standing in prairie habitat

SEP 26 · 1981

A Wyoming Discovery Brings the Black-Footed Ferret Back Into View

Exploration

View all →

U.S. Army Douglas World Cruiser aircraft during the 1924 round-the-world flight

SEP 28 · 1924

The First Flight Around the World Returns to Seattle

Film & TV

View all →

1895

The Lumière Cinématographe Is Shown to a Paying Paris Audience

1891
Edison’s laboratory demonstrates a prototype Kinetoscope

The Story Behind the Photo

Chicago After the Fire: From Burned Blocks to a New Skyline

A photograph taken after the 1871 fire can make Chicago look as though its future had been decided by a wall of flame. A view from around 1905 tells a different story: tall offices, busy transport routes and commercial streets crowded again.

Explore the frame →

Collections

Explore by Topic

People Places Eras Science

My Birthday in History

See what happened on your date.

September

SUNMONTUEWEDTHUFRISAT1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30

Watch in 30 Seconds

Big moments, short videos.

Browse videos →

Explore the Archive

Choose a dateSurprise me

Galle and d’Arrest identify Neptune at Berlin Observatory

This Week in History

Discovery Returns from an Atmospheric Research Mission

War & Conflict

An Indian Airlines flight is diverted to Lahore

Space

Mars Observer Launches Toward the Red Planet

Technology

The Boeing 767 Takes Flight for the First Time

History

Stanislav Petrov Assesses a False Nuclear Alarm

China Conducts Its First Nuclear Test

Tsar Bomba: The Largest Nuclear Test Explosion

Crime & Justice

Seven Lives Lost: The Unsolved Mystery of United Air Lines Flight 23

An Ovechkin family group hijacks Aeroflot Flight 3739

Science

Galle and d’Arrest identify Neptune at Berlin Observatory

Eight People Entered Biosphere 2

CERN circulates the first beam in the Large Hadron Collider

Medicine & Health

Ether Day: The Demonstration That Changed Surgery

Surgeons Perform the First Partial Face Transplant

The First World AIDS Day

Nature & Disasters

A Wyoming Discovery Brings the Black-Footed Ferret Back Into View

Arrow Air Flight 1285 Crashes at Gander

A Living Coelacanth Is Caught off South Africa

Exploration

The First Flight Around the World Returns to Seattle

Film & TV

The Lumière Cinématographe Is Shown to a Paying Paris Audience

Edison’s laboratory demonstrates a prototype Kinetoscope

The Story Behind the Photo

Chicago After the Fire: From Burned Blocks to a New Skyline

Collections

The Road to the Moon

Fires That Changed Cities

The Age of Invention

Explore by Topic

My Birthday in History

Watch in 30 Seconds

Explore the Archive