From the ISS to VDNKh: The Journey of Sergey Ryazansky’s Photographs

Sergey Ryazansky photographed the Earth with a handheld camera during two expeditions aboard the International Space Station. After his flights, he selected images for books and exhibitions, while editors and curators presented them in a range of public settings — from the Fundamental Library of Moscow State University to the science and technology venue at VDNKh. They determined the viewing sequence and prepared the material for display; audiences were shown a curated series rather than the entire working archive.

The official flight chronology, rules governing the storage of space photography, the photographer’s own publications and museum announcements make it possible to reconstruct the life story of the photograph. Between the press of the shutter and the photograph’s encounter with its audience come attribution, selection, captioning, printing and curatorial work. The published exhibition announcement does not include a complete catalogue of the works, so without metadata it is impossible to assign an exact date, lens or expedition number to each print.

Why is Sergei Ryazansky’s biography important for understanding the photographs?

Sergey Ryazansky entered the field of space exploration as a biologist. His official biography from the Gagarin Cosmonaut Training Centre traces his professional development to the Institute of Biomedical Problems of the Russian Academy of Sciences: he began working there as a junior researcher in 1996 and later became a researcher and then a senior researcher. In 2006, he completed his Candidate of Sciences dissertation in biology on voluntary movement under conditions of support unloading.

Ryazansky joined the cosmonaut corps on 29 May 2003, qualified as a research cosmonaut on 5 July 2005 and as a test cosmonaut on 12 November 2010. These dates trace his progression from the Institute of Biomedical Problems to his qualification as a test cosmonaut; his biography from the Gagarin Cosmonaut Training Centre does not describe how he composed individual photographs.

Ryazansky’s experience at the Institute of Biomedical Problems explains why observing and recording conditions were already familiar to him before his first flight. It does not prove that every photograph was guided by artistic intent. When analysing the series, his biography provides the professional context, while the date, location and technique of an individual image are established from its caption and metadata.

Sergei Ryazansky’s photographs of Earth from space: two expeditions

Sergey Ryazansky made two space flights, and the official chronology delineates the periods during which the photographs may have been taken. His first mission began on 26 September 2013 aboard Soyuz TMA-10M and ended on 11 March 2014. Ryazansky served as a member of ISS Expeditions 37 and 38; his time in space lasted 166 days, 6 hours and 26 minutes, while his three spacewalks totalled 19 hours and 48 minutes.

His second space flight lasted from 28 July to 14 December 2017. The Soyuz MS-05 crew joined Expeditions 52 and 53, and Ryazansky spent 138 days, 16 hours and 57 minutes in orbit, completing another spacewalk lasting 7 hours and 34 minutes. NASA's Expedition 53 page confirms the launch and return dates, the mission participants and the flight's principal objectives.

The Expedition 53 gallery brings together views of Earth and photographs of the station, the crew's daily work and experiments. It is the project's collective archive, not Sergey Ryazansky's personal selection. A photograph's inclusion in such a collection does not in itself prove individual authorship. Reliable attribution requires a caption from the official rights holder, a catalogue entry or an explicit author credit in a publication or at an exhibition.

Sergey Ryazansky's photographs from the ISS span two expeditions separated by more than three years. The phrase therefore does not refer to a single photographic session. If a publication does not include a date, the photograph cannot automatically be linked to his first or second space flight: the period must be established from a catalogue entry or a caption provided by the official rights holder.

‘400 km above Earth’: an approximate orbital altitude

The title of the 2016 exhibition conveys the typical scale of the ISS's orbit using a rounded figure. NASA's reference page gives the station's operational altitude range as 370 to 460 kilometres. Atmospheric drag gradually lowers its orbit, while the engines of the station or docked spacecraft periodically raise it. The precise altitude therefore depends on the date the photograph was taken and the station's orbital parameters at the time.

The station travels from west to east in an orbit inclined at 51.6 degrees. Each orbit takes between 90 and 93 minutes; the ISS typically completes between 15.5 and 15.9 orbits per day. During each orbit, the Earth has time to rotate, so the next ground track passes approximately 22.9 degrees of longitude west of the previous one. The pattern of ground tracks repeats after three days, although the station's altitude affects how precisely they align.

A repeated ground track does not mean a repeated photograph. NASA describes an approximately 63-day cycle in the shifting illumination of the orbits: the daylight zone falls on different sections of the route, while the season determines the angle of the sun's rays. The same area may come into view in the morning, in the evening, beneath cloud cover, or remain on the night side altogether. Ryazansky composed each shot amid a rapidly changing combination of ground track, weather and light.

A cosmonaut does not steer the station towards a chosen subject. Instead, they prepare for a brief observation window, choose a suitable porthole and respond to the light and cloud cover during the flyover. Photographs of the same area can therefore differ considerably. The number ‘400’ in the exhibition title represents the typical altitude and the photographer’s vantage point; the geometry of an individual shot is determined from the date and the ISS trajectory.

Photography from the ISS: window, camera and orbital-pass conditions

ISS crews photograph the Earth with handheld digital cameras through the station’s windows. Participants in NASA’s Crew Earth Observations project receive training, the ground team suggests targets, and the cosmonaut in orbit takes account of cloud cover, lighting and rapidly changing phenomena. An automated satellite instrument operates with predetermined geometry; a person can adjust the camera’s direction and composition in response to what they see.

One of the principal observation points is the Cupola module, a panoramic bay window on the ISS with seven windows: six around the sides and one facing the Earth. The windows are fitted with protective shutters. NASA states that crews use the Cupola to monitor robotic-arm operations and dockings, as well as to photograph the Earth. However, there are other windows on board suitable for photography, so the location from which a particular image was taken must be established from documentation rather than from a general description of the series.

The station moves rapidly relative to the Earth's surface, so the line of sight is constantly changing, while the play of light depends on the position of the Sun, cloud cover and reflections in the multi-layered window. The cosmonaut selects the focal length, exposure and moment to release the shutter. Photographs of the same area differ because of the particular combination of light, atmospheric conditions and terrain during each pass.

Handheld orbital photography preserves the photographer's creative choices. Ryazansky decided what to leave outside the frame, whether to capture a wide view or a detail, and whether to include the horizon, a cloud system, a city at night or the geometric patterns of the Earth's surface. Orbital altitude broadens the field of view, but it is the person at the window who determines the boundaries of the image.

Metadata: the path from view to document

The verifiability of orbital photography depends on metadata. In NASA catalogues, images are identified by a combination of mission, film roll or digital image set, and frame number; for digital files, the date and time, camera model, lens and exposure settings may also be retained. This information makes it possible to correlate a photograph with the station's trajectory and determine more precisely which area of the Earth's surface is shown.

Metadata can also contain gaps. NASA guidance warns that some information may be lost when a compressed file is transmitted and that the camera's clock may deviate from the exact time. If a timestamp does not allow the station's position to be determined reliably, specialists remove it from the search database, although the original remains in the archive. The precise location and time cannot be reconstructed from a social media caption or the visual similarity of a coastline.

Two kinds of evidence are important for a photographer's personal series. Archival records include the file number, date, mission, equipment and official caption. The inclusion of an image in a book or exhibition under the photographer's name confirms authorship. The archive establishes the file's provenance, while Ryazansky's selection shows the place the photograph occupies in his narrative of Earth.

The organisers may publish the photograph without full technical details when the exhibition is intended primarily as a visual experience. If the announcement names the photographer and gives the general period when the photograph was taken, it confirms that the image belongs to the photographer’s orbital series. The specific city, date and lens should be stated only if they appear in the caption or catalogue entry.

The scale of the archive and the value of the artist’s selection

NASA statistics from 11 September 2026 show the size of the overall collection encompassing the individual series created by spaceflight participants. The Gateway to Astronaut Photography of Earth database contained 8 690 608 photographs, taken by astronauts and cosmonauts across various programmes. The International Space Station accounted for 8 192 456 images. These figures span many crews and do not make it possible to calculate the size of Ryazansky’s personal archive.

Specialists entered detailed metadata into a separate table for 745 008 images; the database classified a further 7 945 600 records as not catalogued in this way. This proportion does not mean that millions of files lack any provenance. It illustrates the distinction between an image being present in a vast repository and the detailed subject-based cataloguing needed to search by location, equipment and shooting conditions.

Database users can filter catalogued images by cloud cover, focal length and camera orientation. As of 11 September 2026, specialists had entered details of the optics used for 654 397 Earth-facing images with the required spatial data. This filter helps researchers, but in itself says nothing about an image’s visual impact or the photographer’s decision to include it in a book.

The exhibition selection serves a purpose that archival statistics do not address. In an interview at the Cosmonaut Training Centre on 9 January 2018, Ryazansky said that he had brought back more than 250 thousand photographs from the ISS and still had to sort through them. This was the photographer’s own rough estimate after his second flight, not a database export: the source does not separate the files by expedition, state the number of duplicates or link the images to an exhibition checklist.

In 2016, visitors saw twenty works, while the bibliographic description of the photo album Amazing Earth promised more than a hundred images. After his second flight, Ryazansky spoke of more than 250,000 files that he still had to sort through. These figures relate to different dates and collections, so they cannot be used to calculate the proportion of images published. They merely illustrate the difference in scale between the working archive, the exhibition and the book.

Scientific observation and an exhibition photograph

A scientist assesses an orbital photograph by its known location, time and shooting conditions, and by whether it can be compared with other observations. A curator selects an image for the way it works within a sequence and what the viewer notices in the print. The same file may serve both purposes, but the researcher and the exhibition creator ask different questions of it.

NASA provides a specific example of the scientific use of handheld crew photography. In July 2020, severe flooding in Colombia’s Orinoquía region affected more than 1,200 families and destroyed around 1,600 hectares of crops. Colombia’s Institute of Hydrology, Meteorology and Environmental Studies asked NASA’s Disasters Program to help assess the impact. Astronaut Chris Cassidy photographed the flooding as the ISS passed overhead, while specialists at Johnson Space Center matched the images to the terrain and supplied the material to the country’s emergency services.

This episode does not involve Sergei Ryazansky’s photographs and does not prove that every image he took had a scientific purpose. It demonstrates the potential of the same method of observation: a trained crew member uses a handheld camera, specialists on the ground identify the location, and the relevant agencies compare images taken over several days. For this type of work, the station’s position and the time of each image are crucial; expressive composition remains secondary.

Night-time photography serves another research purpose. NASA notes that photographs of city lights help scientists study urbanisation and light pollution. Researchers need series of images taken in comparable locations and conditions, whereas an exhibition curator may favour a photograph with a striking pattern of lights. Scientific value and visual impact may coincide, but each must be established independently.

The organisers of Techno-Scientific Space invite visitors to view Ryazansky’s photographs both as images of Earth and as products of advances in science and technology. The official announcement does not attribute a specific research function to each exhibit. The technical conditions in which the photographs were taken can therefore be discussed as context for the series, while any scientific purpose assigned to an individual image should be considered only where a documented project exists.

How to verify the provenance of a specific photograph

Reliable attribution requires four checks: the file identifier, the time the photograph was taken, its geographical location and the photographer’s original source. A caption alone is insufficient to establish this chain of evidence. The verification can be repeated using the publicly accessible Gateway to Astronaut Photography of Earth and the official catalogue of the publication or exhibition.

1. Find the Mission–Roll–Frame number. NASA recommends including this unique number in the caption together with the database address. The first part identifies the mission, the second denotes the film roll or digital series, and the third identifies the frame; the letter E in the second part means that the image was originally captured with a digital camera. The number allows another researcher to open the same record, but does not in itself establish who operated the equipment.
2. Check the date, time and camera data. A digital record may contain Greenwich Mean Time, the camera model, focal length and exposure. Specialists then calculate the ISS’s position at that moment. If the camera clock was inaccurate or the original fields were lost during transmission, the database removes the unreliable marker from search results. In such cases, accuracy cannot be restored through conjecture.
3. Distinguish between the station’s position and the centre of the photograph: Nadir indicates the point on Earth directly beneath the ISS. An astronaut may point the lens to one side, so the centre of an oblique image may lie tens or hundreds of kilometres from the nadir. The NASA catalogue marks near-vertical images as NV, low-oblique images as LO, and views containing the horizon or the atmospheric limb as HO.
4. Verify individual authorship. An archival record confirms the mission, file and geographical location to the extent permitted by the quality of the metadata. The photographer’s identity must be confirmed by an official publication by the artist, a museum checklist, a rights holder’s caption or an institutional publication. If an exhibition credits the entire series to one artist but provides no list of exhibits, it is appropriate to refer to Ryazansky’s series without assigning an unspecified archival number to an individual print.

What conclusions can be drawn from different levels of evidence

Evidence	What it confirms	What it does not confirm on its own
Mission–Roll–Frame	A unique record and its association with the mission	Individual authorship and selection for exhibition
Camera file	The date, time and technical parameters, if the fields have been preserved	The precise subject when the clock is inaccurate or the image was taken at an oblique angle
Catalogue frame centre	Geographical identification performed by specialists	The artistic intent and meaning of the series
Artist's edition or checklist	Inclusion of the work in a personal selection	Full technical record with no link to the archival entry

The nadir is not the centre of the frame

Camera tilt significantly changes the geographical area covered by an image. For near vertical the database uses a centre located within one degree of latitude and longitude of the sub-satellite point. High oblique includes the horizon, while low oblique occupies an intermediate position. The ISS coordinates provide only a starting area for the search if the cosmonaut was photographing at an angle.

The top of the photograph does not necessarily point north either. NASA specifically cautions that the direction field describes the vector from the sub-satellite point to the centre of the frame, while the astronaut may have held the camera in any orientation. Automatically rotating the image according to the compass direction can introduce a new error instead of correcting the original one.

Focal length determines the area of the Earth’s surface covered by an image. A 28 mm lens provides a wide field of view, while an 800 mm lens offers a narrow field with high magnification. NASA states that the most detailed images in the database achieved a ground pixel size of approximately three metres and recommends looking for this level of detail among photographs taken with lenses of 800 mm or longer. This is the best documented result, not a guarantee for every telephoto image: camera tilt, motion blur and atmospheric conditions still affect how clearly objects can be distinguished.

Georeferencing is carried out by people and algorithms

Once the file has been submitted, specialists at the Earth Science and Remote Sensing Unit identify its geographic centre using prominent features and add place names. NASA’s publicly available FAQ describes such an image as catalogued. An ocean with no islands, unbroken cloud cover or a steep viewing angle may leave an entry without a reliably identified centre, even when the station’s position is known.

Researchers from the Find My Astronaut Photo project described an automated way to speed up this work. The algorithm starts with the time and location nadir, divides the likely viewing area into sections, generates satellite images for them and searches for matching key points. Geometrically verified matches make it possible to correct the perspective and prepare a georeferenced file. In a 2023 paper, the authors reported that the system had georeferenced and orthorectified more than 30,000 images in ten months.

Automated geolocation identifies the area of the Earth shown and aligns the photograph with a map. It does not establish individual authorship or reconstruct the history of an exhibition print. Verification of Ryazansky’s photograph is complete only after its geography has been cross-referenced with the author’s own publication or an official exhibition checklist.

First exhibition: ‘400 km Above Earth’

On 7 October 2016, the exhibition ‘400 km above the Earth’ opened at the Fundamental Library of Lomonosov Moscow State University as part of the 6th All-Russian Science Festival NAUKA 0+. The Faculty of Journalism at Moscow State University summed up the project with the phrase ‘20 photographs — 20 stories’. The exhibition was prepared by Sergey Ryazansky and the faculty’s Department of Photojournalism and Media Technologies.

By October 2016, the second flight had not yet taken place, so the exhibition series may have drawn on material from the first expedition of 2013–2014. This is an inference based on comparing the dates, not a separate claim made in the project catalogue. Such verification does not justify combining photographs from different missions into a single undated collection.

The organisers displayed the photographs without captions. Ryazansky wrote that, from orbit, the Earth is seen without the labels found on a map, and that he wanted to convey this perspective to the viewer. Without geographical labels, visitors first took in the light and the contours of rivers, deserts and clouds, rather than searching for a familiar name.

The absence of captions was part of the concept for the 2016 exhibition. Attributing an individual photograph still requires its date and provenance. An exhibition space and an archive serve different purposes: the former organises the viewing experience, while the latter makes it possible to verify the mission and the time and place at which the photograph was taken.

The book as a new sequence

The Cosmonaut Training Centre lists among Sergei Ryazansky’s publications two photo albums from the Amazing Earth series, subtitled Unique Photographs of Earth from Space and The Planet of a Thousand Colours, as well as the book Can You Hammer a Nail in Space? And Other Questions About Space Exploration. The albums document the author’s selection of photographs taken from orbit, while the question-and-answer format complements the images with an account of life aboard the space station.

Roscosmos’s bibliographical selection states that the Amazing Earth photo album contains more than one hundred photographs taken from the International Space Station. The entry does not show the sequence of the spreads, so it cannot establish which deserts, rivers or cities at night the author placed alongside one another. It confirms the publication of a limited selection, but offers no insight into the structure of the complete working archive.

The book Can You Hammer a Nail in Space?…, available in the Roscosmos library, adds explanatory context to the visual material. Photography took its place alongside experiments, station maintenance, training and communications with Earth. The cosmonaut worked at the window amid the expedition’s busy schedule, rather than spending the entire flight waiting for the right light.

The TechnoScientific Space exhibition at VDNKh

As of 13 September 2026, VDNKh’s official events programme states that the ‘Techno-Scientific Space’ exhibition opened on 9 September and is scheduled to run until 9 October 2026 in Pavilion No. 2, home to Robostation. The announcement features photographs of Earth and the starry sky taken by Sergey Ryazansky during orbital expeditions. The series combines spectacular views with the theme of advances in science and technology.

In 2016, the organisers emphasised the viewer’s encounter with an uncaptioned image of Earth. In 2026, the VDNKh exhibition provided a different context: the photographs are presented as the result of advances in science and technology. Alongside the composition itself, viewers are invited to consider the space station, the camera and the conditions of working in orbit.

The exhibition’s official page does not publish a complete list of the prints. It therefore cannot confirm whether the same twenty images shown at Moscow State University are being exhibited at VDNKh, or whether the entire selection comes from a single mission. The announcement also gives no details of the dimensions of the works, the printing method or the accompanying texts. Drawing such conclusions would require an exhibition catalogue or an examination of every museum label.

Handheld photographs and automated satellite data: different purposes

Automated satellite instruments collect data according to a predetermined programme and with consistent viewing geometry. A handheld photograph depends on the lens, the camera angle and the moment chosen by a crew member. NASA's guidance explicitly distinguishes between the fixed geometry of an automated satellite and a person's ability to change the direction of the shot.

Human choice is particularly evident along the day–night boundary, through breaks in the clouds, in low sunlight or over a phenomenon that is difficult to align with the station's trajectory in advance. NASA emphasises the value of a trained observer when documenting dynamic events and unexpected conditions. A handheld photograph does not replace a specialised instrument; it serves a different intellectual purpose.

A cartographic product helps to locate an object precisely and compare areas of the surface. A handheld photograph may include the horizon or, conversely, narrow the field of view to the patterns of the terrain. At the 2016 exhibition, the absence of captions emphasised this authorial choice; the organisers of the 2026 project also draw attention to the technical conditions in which the photographs were taken.

How to read an orbital photograph

Begin by identifying the features visible in the photograph: the shape of the coastline, the direction of mountain ranges, the pattern of river channels, the cloud cover and the position of the horizon. Then compare your visual hypothesis with the caption, archive number and time of capture. A recognisable outline alone is not enough for precise attribution.

Focal length can dramatically narrow the field of view. Two images taken from the same orbit may look as though the photographer was at different altitudes. Without information about the lens, the viewer cannot confidently judge distances from the composition alone.

Colour is affected by atmospheric conditions, the angle of the light, white balance, the properties of the window and subsequent processing. A rich hue in a desert or body of water may belong to the actual scene, but an accurate interpretation requires the original image and details of any adjustments. An exhibition print also depends on the paper, print profile and gallery lighting.

A visual description must be checked against documentary evidence. First, the viewer records the visible features without trying to guess the location, and then compares them with the identifier, time and official caption. This approach preserves the openness of vision that Ryazansky discussed in the project 400 km Above the Earth, while restoring the photograph's verifiable context.

Fact, editorial interpretation and gaps in the sources

Official sources confirm the dates of the two flights, the expedition crews, the time spent working in orbit, Ryazansky's participation in spacewalks, the existence of his books and the exhibitions that were announced. NASA also documents the general practice of ISS crews taking handheld photographs of Earth and cataloguing the images.

On the basis of these facts, a researcher can explain how the juxtaposition of photographs changes the way they are perceived, why the photographer's scientific background influences the reading of the series, and how VDNKh as a venue links photography with the public image of space exploration. Such a conclusion remains an interpretation: official sources do not attribute it to Ryazansky or the curators.

Without a published checklist for the TechnoScientific Space exhibition, it is impossible to link each print to a specific file number in the orbital archive. Without seeing the exhibition in person, it is impossible to describe how the works were actually hung or how visitors responded. The poster confirms the venue, dates and general subject, but it neither replaces a catalogue nor constitutes evidence of a personal visit.

If a source provides no answer, the gap should be preserved. It is easy to accompany an orbital photograph with an appealing conjecture about the place, the moment or the photographer's intention. Precise attribution makes it possible to distinguish such conjecture from the documented history of the image.

From the ISS to the exhibition hall: what can be proven

Ryazansky photographed Earth with a handheld camera during the 2013–2014 and 2017 expeditions. After the files were transferred, specialists preserved the archival information and the photographer selected the images. In 2016, he presented twenty works at the exhibition 400 km Above the Earth, and later published orbital photographs in books from the Amazing Earth series. In September 2026, TechnoScientific Space opened at VDNKh.

Archivists record the identifier, time and technical details; Ryazansky selects the photographs, the editor determines the order of the pages, and the curator decides the scale of the prints and how the works are juxtaposed. At each stage, some information is preserved while some remains outside the published record. The journey of a particular photograph must therefore be reconstructed from several documents: the archival record, the photographer's publication and the exhibition catalogue.

You can compare orbital photographs with the way Soviet architecture and monumental art portrayed the exploration of space on the VDNKh and Space tour: the route passes the Monument to the Conquerors of Space and follows Cosmonauts Alley and VDNKh's central architectural ensemble. The exhibition in Pavilion No. 2 is a separate event held within the grounds; a visit to it is not advertised as part of the tour.

Sources

1. Techno-Scientific Space exhibition
2. Sergey Nikolayevich Ryazansky: Biography and Spaceflights
3. Expedition 53
4. Expedition 53 Image Gallery
5. Astronaut Photography: Observing the Earth from the International Space Station
6. Observing our Planet from Low Earth Orbit
7. International Space Station
8. Space Station Orbit Tutorial
9. Gateway to Astronaut Photography of Earth: Database Statistics
10. Cupola
11. Gateway to Astronaut Photography of Earth: camera file metadata
12. Meeting cosmonaut Sergey Ryazansky and the opening of the “400 km Above the Earth” photography exhibition
13. Sergey Ryazansky Turns 50
14. Sergey Ryazansky. “Can You Hammer a Nail in Space and Other Questions About Space Exploration”
15. Gateway to Astronaut Photography of Earth: FAQ
16. Find My Astronaut Photo: Automated Localization and Georectification of Astronaut Photography
17. Sergey Ryazansky: “I Returned Home with a Deep Sense of Satisfaction”
18. Recommended Reading About Space