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Portrait - Riese, Adam, scientist

Portrait - Riese, Adam, scientist

Picryl description: Public domain image of a portrait of a scientist, free to use, no copyright restrictions.

Portrait - Mari, Abbate, scientist

Portrait - Mari, Abbate, scientist

Public domain photo of man portrait art print, free to use, no copyright restrictions image - Picryl description

Portrait - Angeli, Stefano degli, scientist

Portrait - Angeli, Stefano degli, scientist

Public domain reproduction of portrait art print, free to use, no copyright restrictions image - Picryl description

Portrait - Welper, Eberhard, scientist

Portrait - Welper, Eberhard, scientist

Public domain photograph of portrait art print, 17th century, free to use, no copyright restrictions image - Picryl description

Portrait - Löhe, Johann Konrad, scientist

Portrait - Löhe, Johann Konrad, scientist

Public domain reproduction of German art print, free to use, no copyright restrictions image - Picryl description

Portrait - Welper, Eberhard, scientist

Portrait - Welper, Eberhard, scientist

Public domain photograph of portrait art print, 17th century, free to use, no copyright restrictions image - Picryl description

Portrait - Eberhard, Philipp, scientist

Portrait - Eberhard, Philipp, scientist

Public domain reproduction of art print, 16th-17th century, free to use, no copyright restrictions image - Picryl description.

Portrait - Gauss, Karl Friedrich, scientist

Portrait - Gauss, Karl Friedrich, scientist

Public domain reproduction of portrait art print, free to use, no copyright restrictions image - Picryl description

Portrait - Giovanni di Sacrobosco, scientist

Portrait - Giovanni di Sacrobosco, scientist

Public domain photo of Italian sculpture, 18th century, free to use, no copyright restrictions image - Picryl description.

Portrait - Snellius, Rudolf, scientist

Portrait - Snellius, Rudolf, scientist

Public domain scan of portrait art print, free to use, no copyright restrictions image - Picryl description

Portrait - Froidmont, Libert, scientist

Portrait - Froidmont, Libert, scientist

Public domain scan of portrait art print, free to use, no copyright restrictions image - Picryl description

Portrait - Thalius, Daniel, scientist

Portrait - Thalius, Daniel, scientist

Public domain scan of portrait art print, free to use, no copyright restrictions image - Picryl description

Portrait - Drebbel, Cornelis Jacobsz, scientist

Portrait - Drebbel, Cornelis Jacobsz, scientist

Public domain reproduction of portrait art print, free to use, no copyright restrictions image - Picryl description

Portrait - Wideburg, Johann Bernhard, scientist

Portrait - Wideburg, Johann Bernhard, scientist

Public domain photograph of portrait art print, 18th century, free to use, no copyright restrictions image - Picryl description

Portrait - Bernoulli, Johann, scientist

Portrait - Bernoulli, Johann, scientist

Picryl description: Public domain image of a portrait of a scientist, free to use, no copyright restrictions.

Portrait - Ceulen, Ludolf van, scientist

Portrait - Ceulen, Ludolf van, scientist

Public domain scan of portrait art print, free to use, no copyright restrictions image - Picryl description

Portrait - Stöffler, Johannes, scientist

Portrait - Stöffler, Johannes, scientist

Public domain reproduction of portrait art print, free to use, no copyright restrictions image - Picryl description

Portrait - Archimedes, portrait, scientist

Portrait - Archimedes, portrait, scientist

Picryl description: Public domain image of a portrait of a scientist, free to use, no copyright restrictions.

Portrait - Neudörfer, Johann, scientist

Portrait - Neudörfer, Johann, scientist

Picryl description: Public domain image of a portrait of a scientist, free to use, no copyright restrictions.

Portrait - Vaulzard, J.L., scientist

Portrait - Vaulzard, J.L., scientist

Public domain scan of portrait art print, free to use, no copyright restrictions image - Picryl description

Portrait - Stempel, Gerhard, scientist

Portrait - Stempel, Gerhard, scientist

Public domain reproduction of portrait art print, free to use, no copyright restrictions image - Picryl description

Portrait - Riese, Adam, scientist

Portrait - Riese, Adam, scientist

Picryl description: Public domain image of a print - round portrait, medal, medallion, free to use, no copyright restrictions.

Portrait - Jung, Joachim, scientist

Portrait - Jung, Joachim, scientist

Public domain reproduction of portrait art print, free to use, no copyright restrictions image - Picryl description

Portrait - Odontius, Johann Kaspar, scientist

Portrait - Odontius, Johann Kaspar, scientist

Public domain reproduction of German art print, free to use, no copyright restrictions image - Picryl description

Portrait - Pascal, Blaise, scientist

Portrait - Pascal, Blaise, scientist

Public domain reproduction of portrait art print, free to use, no copyright restrictions image - Picryl description

Portrait - Galilei, Galileo, scientist

Portrait - Galilei, Galileo, scientist

Public domain scan of a portrait print, bust portrait drawing, free to use, no copyright restrictions image - Picryl description

Portrait - Martin, Benjamin, scientist

Portrait - Martin, Benjamin, scientist

Public domain scan of portrait art print, free to use, no copyright restrictions image - Picryl description

Portrait - Pascal, Blaise, scientist

Portrait - Pascal, Blaise, scientist

Public domain photo of man portrait art print, free to use, no copyright restrictions image - Picryl description

Portrait - Struijck, Nicolaas, scientist

Portrait - Struijck, Nicolaas, scientist

Public domain reproduction of portrait art print, free to use, no copyright restrictions image - Picryl description

Portrait - Bartjens, Willem, scientist

Portrait - Bartjens, Willem, scientist

Public domain reproduction of portrait art print, free to use, no copyright restrictions image - Picryl description

Portrait - Trew, Abdias, scientist

Portrait - Trew, Abdias, scientist

Public domain reproduction of portrait art print, free to use, no copyright restrictions image - Picryl description

Portrait - Varignon, Pierre, scientist

Portrait - Varignon, Pierre, scientist

Public domain photo of portrait art print, France, free to use, no copyright restrictions image - Picryl description

Portrait - Varignon, Pierre, scientist

Portrait - Varignon, Pierre, scientist

Public domain photograph of portrait art print, 18th century, free to use, no copyright restrictions image - Picryl description

Portrait - Rossignol, Antoine, scientist

Portrait - Rossignol, Antoine, scientist

Picryl description: Public domain image of a portrait of a scientist, free to use, no copyright restrictions.

Portrait - Le Seur, Thomas, scientist

Portrait - Le Seur, Thomas, scientist

Public domain reproduction of portrait art print, free to use, no copyright restrictions image - Picryl description

Portrait - Rossignol, Antoine, scientist

Portrait - Rossignol, Antoine, scientist

Picryl description: Public domain image of a portrait of a scientist, free to use, no copyright restrictions.

Portrait - Apianus, Petrus, scientist

Portrait - Apianus, Petrus, scientist

Verleger: Jobin, Bernhard Stecher: Stimmer, Tobias Verlagsort: Straßburg Public domain scan of 16th-century print, free to use, no copyright restrictions image - Picryl description

Portrait - Apianus, Petrus, scientist

Portrait - Apianus, Petrus, scientist

Stecher: Bry, Johann Theodor de Datierung: 1597 / 1599 Public domain scan of 16th-century print, free to use, no copyright restrictions image - Picryl description

Portrait - Apianus, Petrus, scientist

Portrait - Apianus, Petrus, scientist

Stecher: Bry, Johann Theodor de Datierung: 1597 / 1599 Public domain scan of 16th-century print, free to use, no copyright restrictions image - Picryl description

Portrait - Bacon, Francis, scientist

Portrait - Bacon, Francis, scientist

Public domain reproduction of portrait art print, free to use, no copyright restrictions image - Picryl description

Leibniz, Gottfried Wilhelm Freiherr von

Leibniz, Gottfried Wilhelm Freiherr von

Public domain reproduction of portrait art print, free to use, no copyright restrictions image - Picryl description

Portrait - Goldmayer, Andreas, scientist

Portrait - Goldmayer, Andreas, scientist

Stecher: Somer, Mathias van Public domain photograph of 17th century Dutch drawing, free to use, no copyright restrictions image - Picryl description

Portrait - Longomontanus, Christian Severinus, scientist

Portrait - Longomontanus, Christian Severinus, scientist

Public domain reproduction of portrait art print, free to use, no copyright restrictions image - Picryl description

Portrait - Brahe, Tycho, scientist

Portrait - Brahe, Tycho, scientist

Radierer: François, Jean-Charles Datierung: 1761 / 1765 Public domain photograph of portrait print, 16th-17th century, free to use, no copyright restrictions image - Picryl description

Portrait - Simler, Josias, scientist

Portrait - Simler, Josias, scientist

Stecher: Meyer, Conrad Public domain scan of 17th-century portrait print, free to use, no copyright restrictions image - Picryl description

Benjamin Franklin, 17th century, Metropolitan Museum of Art

Benjamin Franklin, 17th century, Metropolitan Museum of Art

Probably François Marie Suzanne (French, active 1751–1802) Public domain photograph of figurine, small sculpture, archaeology, free to use, no copyright restrictions image - Picryl description

Portrait - Bacon, Francis, scientist

Portrait - Bacon, Francis, scientist

Public domain scan of portrait art print, free to use, no copyright restrictions image - Picryl description

Portrait - Brahe, Tycho, scientist

Portrait - Brahe, Tycho, scientist

Stecher: Appold, Johann Leonhard Verlag: Lloyd Triestino Datierung: 1849 / 1858 Verlagsort: Triest

Portrait - Brahe, Tycho, scientist

Portrait - Brahe, Tycho, scientist

Stecher: Buchhorn, Ludwig Public domain scan of German 17th-century print, free to use, no copyright restrictions image - Picryl description

Portrait - Snellius, Rudolf, scientist

Portrait - Snellius, Rudolf, scientist

Verleger: Clouck, Andries Verlagsort: Leiden Public domain scan of 17th-century portrait print, free to use, no copyright restrictions image - Picryl description

Portrait - Boyle, Robert, scientist

Portrait - Boyle, Robert, scientist

Stecher: Monogrammist R.W. Stecher: White, Robert (1645) Datierung: 1667 / 1700 Public domain scan of 17th-century scientific illustration, free to use, no copyright restrictions image - Picryl description

Portrait - Pascal, Blaise, scientist

Portrait - Pascal, Blaise, scientist

Public domain photograph of portrait art print, France, free to use, no copyright restrictions image - Picryl description

Portrait - Deventer, Jakob van, scientist

Portrait - Deventer, Jakob van, scientist

Public domain image of portrait, 17th century print, Netherlands, free to use, no copyright restrictions image - Picryl description

Portrait - Saunderson, Nicholas, scientist

Portrait - Saunderson, Nicholas, scientist

Picryl description: Public domain image of a portrait of a scientist, free to use, no copyright restrictions.

Portrait - Wallis, John, scientist

Portrait - Wallis, John, scientist

Public domain reproduction of portrait art print, free to use, no copyright restrictions image - Picryl description

Portrait - Archimedes, portrait, scientist

Portrait - Archimedes, portrait, scientist

Stecher: David, Jérôme Verleger: Langlois, François Entwerfer: Vignon, Claude Verlagsort: Public domain scan of French 17th-century print, free to use, no copyright restrictions image - Picryl description

Gemma Frisius / Esme de Boulonois, fe.

Gemma Frisius / Esme de Boulonois, fe.

Frisius Gemma, head-and-shoulders portrait, facing right. Illus. possibly from: Academia des sciences et des arts ... / Isaac Bullart. Brusselle : Foppens, 1695. Not listed in LeBlanc.

Portrait - Apianus, Petrus, scientist

Portrait - Apianus, Petrus, scientist

Formschneider: Stimmer, Tobias Public domain scan of 18th-century portrait print, free to use, no copyright restrictions image - Picryl description

Portrait - Guglielmini, Domenico, scientist

Portrait - Guglielmini, Domenico, scientist

Verleger: Luciani, Antonio Stecher: Luciani, Antonio Datierung: 1710 / 1720 faktischer Entstehungsort: Venedig

Portrait - Junius, Ulrich, scientist

Portrait - Junius, Ulrich, scientist

Verleger: Gleditsch, Johann Gottlieb Stecher: Bernigeroth, Martin Verlagsort: Leipzig Public domain photograph of portrait print, 18th century, free to use, no copyright restrictions image - Picryl description

Plaque Portrait of Benjamin Franklin (West Midlands)

Plaque Portrait of Benjamin Franklin (West Midlands)

Made in France Public domain scan - bust portrait, free to use, no copyright restrictions image - Picryl description

Portrait of Benjamin Franklin (West Midlands)

Portrait of Benjamin Franklin (West Midlands)

Made in France Public domain photograph of French art object, free to use, no copyright restrictions image - Picryl description

Plaque Portrait of Benjamin Franklin

Plaque Portrait of Benjamin Franklin

After Jacques Thouron Made in France Public domain photograph of 18th-century portrait painting, free to use, no copyright restrictions image - Picryl description

Portrait of Benjamin Franklin (West Midlands)

Portrait of Benjamin Franklin (West Midlands)

Made in France Public domain photograph of 18th-century English painting, free to use, no copyright restrictions image - Picryl description

Portrait - Leupold, Jakob, scientist

Portrait - Leupold, Jakob, scientist

Verleger: Gleditsch, Johann Gottlieb Stecher: Bernigeroth, Martin Verlagsort: Leipzig Public domain scan of 18th-century portrait print, free to use, no copyright restrictions image - Picryl description

[Details of the mechanisms of the Leibniz calculator, the most advanced of its time]

[Details of the mechanisms of the Leibniz calculator, the most advance...

Picryl description: Public domain illustrated book page scan, engraving, free to use art, no copyright restrictions image.

Portrait - Thalius, Daniel, scientist

Portrait - Thalius, Daniel, scientist

Stecher: Kilian, Wolfgang Philipp Verlag: Tauber, Johann Daniel (Erben) Verlagsort: Altdorf

[Diagrams of various electrical phenomena and title page of Experiments and observations on electricity]

[Diagrams of various electrical phenomena and title page of Experiment...

Frontispiece and title page in: Experiments and observations of electricity / Benjamin Franklin. London : Printed for F. Newbery, 1774. Published in: The tradition of science / Leonard C. Bruno. Washington, D.C... More

Portrait Panel of Benjamin Franklin

Portrait Panel of Benjamin Franklin

A portrait of a man in a suit and tie, North America, free to use, no copyright restrictions image - Picryl description

Portrait - Guglielmini, Domenico, scientist

Portrait - Guglielmini, Domenico, scientist

Verleger: Gini, Cesare Massimiliano (Conte) Datierung: 1791 / 1780 Public domain scan of Italian 18th-century print, free to use, no copyright restrictions image - Picryl description

B. Franklin, L.L.D. F.R.S. - ambassador from the Congress of America to the Court of France / J. Norman sc.

B. Franklin, L.L.D. F.R.S. - ambassador from the Congress of America t...

Print shows Benjamin Franklin, head-and-shoulders portrait, left profile, in oval. After the medal by the Manufacture Nationale de Sèvres in 1778. Illus. in: An impartial history of the war in America, between... More

Dr. Benjamin Franklin engrav'd by P.R. Maverick, 65 Liberty Street

Dr. Benjamin Franklin engrav'd by P.R. Maverick, 65 Liberty Street

Print shows Benjamin Franklin, head-and-shoulders portrait, wearing fur hat and spectacles, facing left, in oval tied with a ribbon at top and festooned with ivy.

Portrait - Riemann, Bernhard, scientist

Portrait - Riemann, Bernhard, scientist

Public domain scan of portrait art print, free to use, no copyright restrictions image - Picryl description

Portrait - Bordoni, Antonio, scientist

Portrait - Bordoni, Antonio, scientist

Public domain scan of portrait art print, free to use, no copyright restrictions image - Picryl description

A black and white photo of a man in front of a chalkboard. Albert einstein portrait person.

A black and white photo of a man in front of a chalkboard. Albert eins...

Stock photography: A man with a mustache and a suit and tie / A black and white photo of a man in front of a chalkboard.

Portrait - Hallaschka, Cassian, scientist

Portrait - Hallaschka, Cassian, scientist

Public domain scan of portrait art print, free to use, no copyright restrictions image - Picryl description

Portrait - Ressel, Josef, scientist

Portrait - Ressel, Josef, scientist

Public domain scan of portrait art print, free to use, no copyright restrictions image - Picryl description

Francis Bacon from "[The Castles and Abbeys of England ... Illustrated by ... engravings.]"

Francis Bacon from "[The Castles and Abbeys of England ... Illustrated...

This image has been taken from scan 000137 from volume 01 of "[The Castles and Abbeys of England ... Illustrated by ... engravings.]". The title and subject terms of this image have been generated from tags, cr... More

C'est singulier, depuis huit mois..

C'est singulier, depuis huit mois..

C'est singulier, depuis huit mois qu'elles sont écloses, ces carpes-là ne grossissent pas, décidément, je crains de m'être trompé, et d'avoir semé de la graine de goujons! Courtesy of Boston Public Library

Charles Nicolas Cochin II - Benjamin Franklin, 19th century

Charles Nicolas Cochin II - Benjamin Franklin, 19th century

Probably designed by Emile Dupont-Zipcy (1822–1885) Made in France

Scientists assert that all diseases can be prevented by inoculation / J. Keppler.

Scientists assert that all diseases can be prevented by inoculation / ...

Illustration shows Puck standing on a stack of bound PUCK volumes between a row of people on the left identified as a "Bank President, Cashier, Teller, Clerk, [and] Janitor" as well as a scrub-woman and an offi... More

Benjamin Franklin and Richard Oswald discussing the Treaty of Peace Paris

Benjamin Franklin and Richard Oswald discussing the Treaty of Peace Pa...

Depicts events from 1782. Halftone repro. of drawing by Howard Pyle. Illus. in: Scribner Magazine, 1898, v. 24, p. 721. Reference copy may be in LOT 4412K. This record contains unverified, old data from caption... More

Benjamin Franklin - Public domain portrait engraving

Benjamin Franklin - Public domain portrait engraving

Public domain photo of portrait art print, free to use, no copyright restrictions image - Picryl description

Sandvikens Järnverk (Sandvikens Jernverk). Stålforskning. Jarnets Metallurgi, Sverige

Sandvikens Järnverk (Sandvikens Jernverk). Stålforskning. Jarnets Meta...

Sandvikens Järnverk (Sandvikens Jernverk). Stålforskning. Public domain image of Industrial development in Sweden, 1900s, historical photograph, free to use, no copyright restrictions image - Picryl description

Pierre Curie (1859-1906) and Marie Sklodowska Curie (1867-1934), c. 1903

Pierre Curie (1859-1906) and Marie Sklodowska Curie (1867-1934), c. 19...

Creator: Science Service..Subject: Curie, Marie 1867-1934. Curie, Pierre 1859-1906..Type: Black-and-white photographs..Date: 1903..Topic: Nobel Prizes. Physics. Women scientists..Local number: SIA Acc. 90-105 [... More

[Professor Cleveland Abbe, first head of U.S. Weather Bureau, head-and-shoulders portrait, facing left] / Clinedinst, Washington, D.C.

[Professor Cleveland Abbe, first head of U.S. Weather Bureau, head-and...

J171116 U.S. Copyright Office. Copyright by Clinedinst, Washington, D.C. Public domain photograph - Portrait, United States, free to use, no copyright restrictions image - Picryl description

[Benjamin Franklin reading draft of Declaration of Independence, John Adams seated, and Thomas Jefferson standing and holding feather pen and paper, around table]

[Benjamin Franklin reading draft of Declaration of Independence, John ...

G62596 U.S. Copyright Office. Reproduction of a painting by J.L.G. Ferris.

This boat with a special receiving was left by scientists of the U.S. Geological Survey in a trip through the Grand Canyon of Colo. in 1923. This set with the oars as an aerial picked up news of the death of Pres. Harding three-quarters of an hour after his death. This was quite some feat considering the set was 3,000 ft. below sea level and 100 degrees in the shade

This boat with a special receiving was left by scientists of the U.S. ...

Picryl description: Public domain image of a portrait of a scientist, free to use, no copyright restrictions.

Geophysical Service Inc., Dallas, Southern Methodist University collection

Geophysical Service Inc., Dallas, Southern Methodist University collec...

Title: Geophysical Service Inc., Dallas ...Creator: Robert Yarnall Richie ...Date: June 5, 1939...Part Of: Robert Yarnall Richie Photograph Collection...Place: Dallas, Texas...Physical Description: 1 nega... More

President John F. Kennedy 's visit to Lawrence Radiation Laboratory. President Kennedy with group outside Building 70A including Edward Teller, LRL Associate Director (right) and Edwin McMillan (left), taken March 23, 1962.  Principal Investigator/Project: Analog Conversion Project

President John F. Kennedy 's visit to Lawrence Radiation Laboratory. P...

Photographs Documenting Scientists, Special Events, and Nuclear Research Facilities, Instruments, and Projects at the Berkeley Lab

President John F. Kennedy's visit to Lawrence Radiation Laboratory. President Kennedy talking with Associate Director Edward Teller, taken March 23, 1962. Principal Investigator/Project: Analog Conversion Project

President John F. Kennedy's visit to Lawrence Radiation Laboratory. Pr...

Photographs Documenting Scientists, Special Events, and Nuclear Research Facilities, Instruments, and Projects at the Berkeley Lab

Photograph of Scientists Testing a Laser Beacon for the Gemini Project

Photograph of Scientists Testing a Laser Beacon for the Gemini Project

Original caption: BLUE-GREEN BEAM: Duane D. Erway (left) and Dr. Paul C. Fletcher of Electro-Optical Systems, Inc., a Pasadena subsidiary of Xerox Crop., adjust blue-green output beam of ionized argon gas laser... More

28K ROCKET STAND AT ROCKET ENGINE TEST FACILITY RETF WITH M CHATMON FROM THE SCHOOL NEIGHBORHOOD YOUTH CORPS SNYC

28K ROCKET STAND AT ROCKET ENGINE TEST FACILITY RETF WITH M CHATMON FR...

28K ROCKET STAND AT ROCKET ENGINE TEST FACILITY RETF WITH M CHATMON FROM THE SCHOOL NEIGHBORHOOD YOUTH CORPS SNYC NASA Identifier: C-1970-352

TURBINE AND DYNAMOMETER, NASA Technology Images

TURBINE AND DYNAMOMETER, NASA Technology Images

The original finding aid described this as: Capture Date: 1/16/1975 Photographer: JOHN MARTON Keywords: Larsen Scan Location Building No: 5 Location Room: SE-1 Photographs Relating to Agency Activities, Fa... More

ION VAPOR RIG, NASA Technology Images

ION VAPOR RIG, NASA Technology Images

The original finding aid described this as: Capture Date: 6/19/1975 Photographer: CLIFF BROOKS Keywords: Larsen Scan Photographs Relating to Agency Activities, Facilities and Personnel

COMBUSTOR INSTALLATION, NASA Technology Images

COMBUSTOR INSTALLATION, NASA Technology Images

The original finding aid described this as: Capture Date: 5/7/1976 Photographer: DONALD HUEBLER Photographer Assistants: JOHN MARTON Keywords: Larsen Scan Location Building No: 35 Location Room: CELL 13 P... More

RETF ROCKET ENGINE TEST FACILITY - LOW CYCLE THERMAL FATIGUE ROCKET TEST

RETF ROCKET ENGINE TEST FACILITY - LOW CYCLE THERMAL FATIGUE ROCKET TE...

The original finding aid described this as: Capture Date: 2/26/1976 Photographer: MARTIN BROWN Keywords: c1976_00800s 1976_00866.jpg Larsen Scan Location Building No: 202 Photographs Relating to Agency Acti... More

COMPRESSOR ASSEMBLY H2, NASA Technology Images

COMPRESSOR ASSEMBLY H2, NASA Technology Images

The original finding aid described this as: Capture Date: 5/15/1978 Photographer: DONALD HUEBLER Keywords: Larsen Scan Location Building No: 23 Location Room: W-1 Photographs Relating to Agency Activities,... More

LOX LIQUID OXYGEN COOLED ENGINE JET AT THE ROCKET ENGINE TEST FACILITY RETF

LOX LIQUID OXYGEN COOLED ENGINE JET AT THE ROCKET ENGINE TEST FACILITY...

The original finding aid described this as: Capture Date: 5/10/1979 Photographer: MARTIN BROWN Keywords: Larsen Scan Location Building No: 202 Photographs Relating to Agency Activities, Facilities and Personnel

This photo of Callisto, outermost of Jupiter's four Galilean satellites, was taken a few minutes after midnight (PST) Feb. 25 by Voyager 1.  The distance to Callisto was 8,023,000 kilometers (4.98 million miles).  The hemisphere in this picture shows a fairly uniform surface dotted with brighter spots that are up to several hundred kilometers across.  Scientists believe the spots may be impact craters but higher-resolution photos will be necessary before the features can be interpreted.  Callisto is about the same size as the planet Mercury--about 5,000 kilometers (3,000 miles) in diameter.  Callisto is less massive than Mercury, however, giving it a density less than twice that of water.  Scientists believe Callisto, therefore, is composed of a mixture of rock and ice (up to about 50 percent by weight).  Its surface is darker than those of the other Galilean satellites, but is still about twice as bright as Earth's Moon.  This black-and-white photo was taken through a violet filter.  Jet Propulsion Laboratory manages and controls the Voyager project for NASA's Office of Space Science. (JPL ref. No. P-21149) ARC-1979-A79-7027

This photo of Callisto, outermost of Jupiter's four Galilean satellite...

This photo of Callisto, outermost of Jupiter's four Galilean satellites, was taken a few minutes after midnight (PST) Feb. 25 by Voyager 1. The distance to Callisto was 8,023,000 kilometers (4.98 million miles... More

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