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This website is not affiliated with, maintained, authorized, endorsed by, or in any way officially connected with NASA or any of its subsidiaries or affiliates. All NASA imagery is in the public domain unless otherwise noted. Data sourced from NASA Open APIs, Launch Library 2, and other open data services.

NASA Gallery

Explore NASA's vast collection of space images, videos, and audio from missions past and present.

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NASA's Image and Video Library: A Visual Archive of Space Exploration

NASA's Image and Video Library is one of the most comprehensive public archives of space imagery in the world, containing over 140,000 images, videos, and audio recordings spanning more than six decades of space exploration. From the earliest Mercury and Gemini missions through the Apollo Moon landings, the Space Shuttle era, and today's cutting-edge observations from the James Webb Space Telescope, this collection documents humanity's journey into the cosmos.

The library includes imagery from diverse sources: telescopes like Hubble and Webb that capture deep-space nebulae, galaxies, and exoplanets; planetary missions like the Mars rovers ( browse Mars photos) and Cassini at Saturn; Earth observation satellites ( see EPIC imagery); astronaut photography from the ISS; and documentation of rocket launches, spacecraft assembly, and ground testing. Most NASA images are in the public domain and free to download at full resolution for educational, editorial, and personal use.

Use the search bar above to find specific subjects — try queries like "Apollo 11," "Hubble Deep Field," "Mars surface," or "astronaut EVA." You can also filter by media type (image, video, or audio). For a daily curated experience, visit the Astronomy Picture of the Day.

Showing results for "Countdown Demonstration Test"

4,244 results found - Page 4 of 177

NASA image: Saturn Apollo Program
Image
Jul 15, 1969

Saturn Apollo Program

Apollo 11 crew members (left to right) Neil Armstrong, Edwin Aldrin, and Michael Collins, wearing space suits, leave...

MSFC
NASA image: Saturn Apollo Program
Image
Jul 15, 1969

Saturn Apollo Program

Apollo 11 crew members (left to right) Michael Collins, Edwin Aldrin (foreground), and Neil Armstrong, wearing space...

MSFC
NASA image: Saturn Apollo Program
Image
Jul 15, 1969

Saturn Apollo Program

Apollo 11 crew members (rear to front) Neil Armstrong, Edwin Aldrin, and Michael Collins, wearing space suits, ride...

MSFC
NASA image: STS-27 Atlantis, OV-104, terminal countdown demonstration test (TCDT) at KSC
Image
Nov 14, 1988

STS-27 Atlantis, OV-104, terminal countdown demonstration test (TCDT) at KSC

S88-53244 (14 Nov 1988) --- The crewmembers for STS-27 leave the operations and checkout (O&C) building en route to...

JSC
NASA image: APOLLO X - LAUNCH VEHICLE APOLLO-SATURN (AS)-505 - COUNTDOWN DEMONSTRATION TEST (CDDT) - KSC
Image
May 4, 1969

APOLLO X - LAUNCH VEHICLE APOLLO-SATURN (AS)-505 - COUNTDOWN DEMONSTRATION TEST (CDDT) - KSC

S69-33853 (4 May 1969) --- Ground-level view of the Apollo 10 (Spacecraft 106/Lunar Module 4/Saturn 505) space...

JSC
NASA image: STS-28 Columbia, OV-102, terminal countdown demonstration test (TCDT) at KSC
Image
Jul 18, 1989

STS-28 Columbia, OV-102, terminal countdown demonstration test (TCDT) at KSC

S89-41093 (9 Aug 1989) --- STS-28 Columbia, Orbiter Vehicle (OV) 102, mission specialist David C. Leestma relaxes in...

JSC
NASA image: STS-27 Atlantis, OV-104, terminal countdown demonstration test (TCDT) at KSC
Image
Nov 14, 1988

STS-27 Atlantis, OV-104, terminal countdown demonstration test (TCDT) at KSC

S88-53086 (17 Nov 1988) --- STS-27 Atlantis, Orbiter Vehicle (OV) 104, crewmembers participate in the terminal...

JSC
NASA image: View of White Room atop Pad A during Apollo 9 Countdown Demonstration Test
Image
Feb 23, 1969

View of White Room atop Pad A during Apollo 9 Countdown Demonstration Test

S69-25884 (23 Feb. 1969) --- Interior view of the white room atop Pad A, Launch Complex 39, Kennedy Space Center,...

JSC
NASA image: Saturn Apollo Program
Image
Jul 15, 1969

Saturn Apollo Program

Lee B. James (left), manager of the Saturn Program at the Marshall Space flight Center (MSFC), talks with Isom...

MSFC
NASA image: Saturn Apollo Program
Image
Jul 15, 1969

Saturn Apollo Program

Dr. Kurt Debus, director of the Kennedy Space Flight Center (KSC), participated in the countdown demonstration test...

MSFC
NASA image: Saturn Apollo Program
Image
Jul 15, 1969

Saturn Apollo Program

Lee B. James (left), manager of the Saturn Program at the Marshall Space flight Center (MSFC), talks with Isom...

MSFC
NASA image: Artemis II CDDT
Video
Dec 20, 2025

Artemis II CDDT

NASA’s launch and mission teams, along with the Artemis II crew, participate in a countdown demonstration test on...

KSC
NASA image: Artemis II CDDT
Video
Dec 20, 2025

Artemis II CDDT

NASA’s launch and mission teams, along with the Artemis II crew, participate in a countdown demonstration test on...

KSC
NASA image: KENNEDY SPACE CENTER, FLA. -  STS-79 Commander William F. Readdy arrives at KSC's Shuttle Landing Facility with five fellow astronauts, ready to participate in the Terminal Countdown Demonstration Test (TCDT).  The TCDT is a dress rehearsal for launch for the flight crew and launch team.  Over the next several days, the astronauts will take part in training exercises at the launch pad that will culminate in a simulated launch countdown.  The Space Shuttle Atlantis is being prepared for liftoff on STS-79 around Sept. 12.
Image
Aug 25, 1996

KENNEDY SPACE CENTER, FLA. - STS-79 Commander William F. Readdy arrives at KSC's Shuttle Landing Facility with five fellow astronauts, ready to participate in the Terminal Countdown Demonstration Test (TCDT). The TCDT is a dress rehearsal for launch for the flight crew and launch team. Over the next several days, the astronauts will take part in training exercises at the launch pad that will culminate in a simulated launch countdown. The Space Shuttle Atlantis is being prepared for liftoff on STS-79 around Sept. 12.

KENNEDY SPACE CENTER, FLA. - STS-79 Commander William F. Readdy arrives at KSC's Shuttle Landing Facility with five...

KSC
NASA image: KSC-97pc184
Image
Jan 21, 1997

KSC-97pc184

STS-82 Terminal Countdown Demonstration Test (TCDT

KSC
NASA image: Artemis II CDDT - Suit Up and Walkout
Image
Dec 20, 2025

Artemis II CDDT - Suit Up and Walkout

NASA astronaut Reid Wiseman, Artemis II commander, undergoes spacesuit checks inside the crew quarters suit-up room...

KSC
NASA image: Artemis II CDDT - Suit Up and Walkout
Image
Dec 20, 2025

Artemis II CDDT - Suit Up and Walkout

NASA astronaut, Christina Koch, Artemis II mission specialist, undergoes spacesuit checks inside the crew quarters...

KSC
NASA image: Artemis II CDDT - Suit Up and Walkout
Image
Dec 20, 2025

Artemis II CDDT - Suit Up and Walkout

NASA astronaut, Christina Koch, Artemis II mission specialist, undergoes spacesuit checks inside the crew quarters...

KSC
NASA image: Artemis II CDDT - Suit Up and Walkout
Image
Dec 20, 2025

Artemis II CDDT - Suit Up and Walkout

From left, NASA astronauts Victor Glover, Artemis II pilot, and Reid Wiseman, Artemis II commander, undergo...

KSC
NASA image: Artemis II CDDT - Suit Up and Walkout
Image
Dec 20, 2025

Artemis II CDDT - Suit Up and Walkout

From left, NASA astronauts Victor Glover, Artemis II pilot, and Reid Wiseman, Artemis II commander, undergo...

KSC
NASA image: Artemis II CDDT - Suit Up and Walkout
Image
Dec 20, 2025

Artemis II CDDT - Suit Up and Walkout

NASA astronaut Victor Glover, Artemis II pilot, undergoes spacesuit checks inside the crew quarters suit-up room in...

KSC
NASA image: Artemis II CDDT - Suit Up and Walkout
Image
Dec 20, 2025

Artemis II CDDT - Suit Up and Walkout

NASA astronaut Victor Glover, Artemis II pilot, undergoes spacesuit checks inside the crew quarters suit-up room in...

KSC
NASA image: Artemis II CDDT - Suit Up and Walkout
Image
Dec 20, 2025

Artemis II CDDT - Suit Up and Walkout

CSA (Canadian Space Agency) astronaut Jeremy Hansen, Artemis II mission specialist, undergoes spacesuit checks...

KSC
NASA image: Artemis II CDDT - Suit Up and Walkout
Image
Dec 20, 2025

Artemis II CDDT - Suit Up and Walkout

NASA astronaut, Christina Koch, Artemis II mission specialist, undergoes spacesuit checks inside the crew quarters...

KSC
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Frequently Asked Questions About NASA Images

Are NASA images free to use?+
Yes, most NASA images are in the public domain and are free to use for educational, informational, and personal purposes. NASA's media usage guidelines state that NASA material is not copyrighted unless otherwise noted. However, the NASA logo and certain insignia are protected. Some images may include identifiable individuals or third-party content that requires additional permissions. Always check the specific image's usage rights and credit NASA as the source.
How many images does NASA have?+
NASA's Image and Video Library contains over 140,000 publicly accessible images, videos, and audio files spanning the agency's entire history, from the Mercury program of the 1960s to the latest James Webb Space Telescope discoveries. The collection grows daily as new missions capture imagery and archival materials are digitized. Individual mission archives, such as Mars rover photos, contain hundreds of thousands of additional images.
Can I download NASA images?+
Yes, you can download NASA images in multiple resolutions directly from this gallery. Each image detail page provides download links for original (full resolution), large (1920px), medium (960px), small (480px), and thumbnail sizes. NASA encourages the public to use these images for education, media, and personal projects. High-resolution originals are ideal for printing and professional use.

Explore More NASA Content

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