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The MarsDial is a sundial that was devised for missions to Mars. It is used to calibrate the Pancam cameras of the Mars landers. MarsDials were placed on the Spirit and Opportunity Mars rovers, inscribed with the words "Two worlds, One sun" and the word "Mars" in 22 languages.^[1] The MarsDial can function as a gnomon, the stick or other vertical part of a sundial.^[2]^[3] The length and direction of the shadow cast by the stick allows observers to calculate the time of day.^[2] The sundial can also be used to tell which way is North, and to overcome the limitations of a magnetic north different from a true north.^[2]

The sundial design team^[4] included Bill Nye "The Science Guy," space artist Jon Lomberg, and astronomers Woodruff Sullivan, Steve Squyres, James Bell and Tyler Nordgren. CAD design and drawings were done by Jason Suchman. The MarsDial was intended to be part science outreach, part calibration target.

Curiosity (MSL), the rover which landed on Mars in August 2012, used a spare sundial remaining from the Mars Exploration Rovers.^[5] It has a new text that reads "Mars 2012" and "To Mars To Explore".^[5]

The ball is the nodus, the post is the gnomon.^[3] The colors on the corners are for calibrating colors, and the inner circles are in greyscale.^[3] There is a mirrored section on the middle circle to reflect the sky.^[3]

The sundials are also "message artifacts"—something for future human explorers to find.^[6]

Time-lapse

Time-lapse video of an analemma from Mars, plotting the course of the Sun over a Martian year (about two Earth years)

List

References

^ ^a ^b ^c About the Pancam and calibration target
^ ^a ^b ^c "Mars Exploration Rover: Mars for Educators: Roverquest". mars.nasa.gov. Retrieved 2018-02-08.
^ ^a ^b ^c ^d Cornell University – Sundial
^ "Martian Sundial Designed For 2001 Space Mission Is Unveiled By Bill Nye 'The Science Guy'". Science Daily. 22 April 1999. The sundial design team included Jon Lomberg, an artist and creative consultant to the Mauna Kea Center for Astronomy Education, Hawaii; Tyler Nordgren, an artist and astronomer at the U.S. Naval Observatory in Flagstaff, Ariz.; sundial expert Woodruff Sullivan, professor of astronomy at the University of Washington; Louis Friedman, executive director of the Planetary Society; Cornell University astronomers Steven Squyres and Jim Bell; and Bill Nye, the television writer and host of the public television children's science program, 'Bill Nye The Science Guy'.
^ ^a ^b ^c Rebecca Boyle (2012). “How A Sundial Lets Curiosity See Mars in Living Color”. Popular Science
^ Hawaii Tribune Herald “Big Island artist’s art to land on Mars, again”

External links

Curiosity's Marsdial is on Mars (The Planetary Society)
The Planetary Society's page covering the MarsDial
Make your own MarsDial! also Planetary.org instructions Archived 2016-03-04 at the Wayback Machine
MSL's sundial on Mars

[pancam.astro.cornell.edu-1] About the Pancam and calibration target

[mars.nasa.gov-2] "Mars Exploration Rover: Mars for Educators: Roverquest". mars.nasa.gov. Retrieved 2018-02-08.

[cornell-3] Cornell University – Sundial

[MarsDialScienceDaily-4] "Martian Sundial Designed For 2001 Space Mission Is Unveiled By Bill Nye 'The Science Guy'". Science Daily. 22 April 1999. The sundial design team included Jon Lomberg, an artist and creative consultant to the Mauna Kea Center for Astronomy Education, Hawaii; Tyler Nordgren, an artist and astronomer at the U.S. Naval Observatory in Flagstaff, Ariz.; sundial expert Woodruff Sullivan, professor of astronomy at the University of Washington; Louis Friedman, executive director of the Planetary Society; Cornell University astronomers Steven Squyres and Jim Bell; and Bill Nye, the television writer and host of the public television children's science program, 'Bill Nye The Science Guy'.

[popsci-5] Rebecca Boyle (2012). “How A Sundial Lets Curiosity See Mars in Living Color”. Popular Science

[6] Hawaii Tribune Herald “Big Island artist’s art to land on Mars, again”

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@@ Line 1: / Line 1: @@
 [[Image:Color target-A8R1 br.jpg|right|thumb|An image of MarsDial]]
+[[File:MarsDial and Rock Spirit.png|thumb|MarsDial on ''[[Spirit rover|Spirit]]'' rover on Mars]]
-The '''MarsDial''' is a [[sundial]] that was devised for missions to [[Mars]]. It is used to calibrate the [[Pancam|Pancam camera]]s of the Mars landers. MarsDials were placed on the [[Spirit rover|Spirit]] and [[Opportunity rover|Opportunity]] [[Mars Exploration Rover|Mars rovers]], inscribed with the words "Two worlds, One sun" and the word "Mars" in 22 languages.<ref>[http://pancam.astro.cornell.edu/pancam_instrument/about.html About the Pancam and calibration target]</ref>
+The '''MarsDial''' is a [[sundial]] that was devised for missions to [[Mars]]. It is used to calibrate the [[Pancam|Pancam camera]]s of the Mars landers. MarsDials were placed on the ''[[Spirit (rover)|Spirit]]'' and ''[[Opportunity (rover)|Opportunity]]'' [[Mars Exploration Rover|Mars rovers]], inscribed with the words "Two worlds, One sun" and the word "Mars" in 22 languages.<ref name="pancam.astro.cornell.edu">[http://pancam.astro.cornell.edu/pancam_instrument/about.html About the Pancam and calibration target]</ref> The MarsDial can function as a [[gnomon]], the stick or other vertical part of a sundial.<ref name="mars.nasa.gov">{{Cite web|url=https://mars.nasa.gov/mer/classroom/marsdial/|title=Mars Exploration Rover: Mars for Educators: Roverquest|website=mars.nasa.gov|access-date=2018-02-08}}</ref><ref name=cornell>[http://athena.cornell.edu/kids/sundial.html Cornell University – Sundial]</ref> The length and direction of the shadow cast by the stick allows observers to calculate the time of day.<ref name="mars.nasa.gov"/> The sundial can also be used to tell which way is North, and to overcome the limitations of a magnetic north different from a true north.<ref name="mars.nasa.gov"/>
-The sundial design team<ref name="MarsDialScienceDaily">{{cite web |url= http://www.sciencedaily.com/releases/1999/04/990422055433.htm |title= Martian Sundial Designed For 2001 Space Mission Is Unveiled By Bill Nye "The Science Guy" |work= [[Science Daily]] |date= 22 April 1999 |quote= The sundial design team included [[Jon Lomberg]], an artist and creative consultant to the [[Mauna Kea Observatory|Mauna Kea]] Center for Astronomy Education, Hawaii;  Tyler Nordgren, an artist and astronomer at the [[United States Naval Observatory Flagstaff Station|U.S. Naval Observatory in Flagstaff, Ariz.]];  sundial expert [[Woodruff T. Sullivan III|Woodruff Sullivan]], professor of astronomy at the [[University of Washington]];  Louis Friedman, executive director of the [[Planetary Society]];  [[Cornell University]] astronomers [[Steve Squyres|Steven Squyres]] and [[James F. Bell, III|Jim Bell]];  and [[Bill Nye]], the television writer and host of the public television children's science program, "Bill Nye The Science Guy." }}</ref>  included  [[Bill Nye]] "The Science Guy," [[space art]]ist [[Jon Lomberg]], and astronomers [[Woodruff T. Sullivan III|Woodruff Sullivan]], [[Steve Squyres]], [[James F. Bell, III|James Bell]] and Tyler Nordgren.
+The sundial design team<ref name="MarsDialScienceDaily">{{cite web |url= https://www.sciencedaily.com/releases/1999/04/990422055433.htm |title= Martian Sundial Designed For 2001 Space Mission Is Unveiled By Bill Nye 'The Science Guy'|work= [[Science Daily]] |date= 22 April 1999 |quote= The sundial design team included [[Jon Lomberg]], an artist and creative consultant to the [[Mauna Kea Observatory|Mauna Kea]] Center for Astronomy Education, Hawaii;  Tyler Nordgren, an artist and astronomer at the [[United States Naval Observatory Flagstaff Station|U.S. Naval Observatory in Flagstaff, Ariz.]];  sundial expert [[Woodruff T. Sullivan III|Woodruff Sullivan]], professor of astronomy at the [[University of Washington]];  Louis Friedman, executive director of the [[Planetary Society]];  [[Cornell University]] astronomers [[Steve Squyres|Steven Squyres]] and [[James F. Bell, III|Jim Bell]];  and [[Bill Nye]], the television writer and host of the public television children's science program, ’Bill Nye The Science Guy’.}}</ref>  included [[Bill Nye]] "The Science Guy," [[space art]]ist [[Jon Lomberg]], and astronomers [[Woodruff T. Sullivan III|Woodruff Sullivan]], [[Steve Squyres]], [[James F. Bell, III|James Bell]] and [[Tyler Nordgren]].  CAD design and drawings were done by Jason Suchman.  The MarsDial was intended to be part [[science outreach]], part calibration target.
-[[Curiosity rover|''Curiosity'']] (MSL), the rover which landed on Mars in August 2012, used a spare sundial remaining from the Mars Exploration Rovers.<Ref name=popsci>[http://www.popsci.com/science/article/2012-08/how-mars-rover-curiositys-sundial-will-help-rover-see-mars-living-color Rebecca Boyle - '''How A Sundial Lets Curiosity See Mars in Living Color''' (2012) - Poplular Science]</ref> It has a new text that reads "Mars 2012" and "To Mars To Explore".<Ref name=popsci/>
+[[Curiosity rover|''Curiosity'']] (MSL), the rover which landed on Mars in August 2012, used a spare sundial remaining from the Mars Exploration Rovers.<ref name=popsci>[http://www.popsci.com/science/article/2012-08/how-mars-rover-curiositys-sundial-will-help-rover-see-mars-living-color Rebecca Boyle (2012). “How A Sundial Lets Curiosity See Mars in Living Color”. ''Popular Science'']</ref> It has a new text that reads "Mars 2012" and "To Mars To Explore".<ref name=popsci/>
-The ball is the nodus, the post is the gnomon.<Ref name=cornell>[http://athena.cornell.edu/kids/sundial.html Cornell University - Sundial]</ref> The colors on the corners are for calibrating colors, and the inner circles for greyscale.<Ref name=cornell/> There is a mirrored section on the middle circle to reflect the sky.<Ref name=cornell/>
+The ball is the nodus, the post is the gnomon.<ref name="cornell"/> The colors on the corners are for calibrating colors, and the inner circles are in greyscale.<ref name=cornell/> There is a mirrored section on the middle circle to reflect the sky.<ref name=cornell/>
-The sundials are also "message artifacts"{{mdash}}something for future human explorers.<ref>[http://www.hawaiitribune-herald.com/sections/news/community/big-island-artist%E2%80%99s-art-land-mars-again.html Hawaii Tribune Herald - Big Island artist’s art to land on Mars, again]</ref>
+The sundials are also "[[message artifact]]s"{{mdash}}something for future human explorers to find.<ref>[https://www.hawaiitribune-herald.com/2012/08/01/hawaii-news/big-island-artists-art-to-land-on-mars-again/ ''Hawaii Tribune Herald'' “Big Island artist’s art to land on Mars, again”]</ref>
+==Time-lapse==
+[[File:Mars Analemma Time Lapse Opportunity.webm|thumb|left|300px|[[Time-lapse]] video of an [[analemma]] from Mars, plotting the course of the Sun over a Martian year (about two Earth years)]]
+{{Clear}}
+==List==
+*[[Spirit (rover)|MER-A ''Spirit'']]<ref name="pancam.astro.cornell.edu"/>
+*[[Opportunity (rover)|MER-B ''Opportunity'']]<ref name="pancam.astro.cornell.edu"/>
+*[[Curiosity (rover)|MSL ''Curiosity'']]<ref name="popsci"/>
+==See also==
+*[[Phoenix (spacecraft)#Phoenix DVD]] (''Phoenix'' Mars lander has a DVD)
+*[[Voyager Golden Record]]
 ==References==
@@ Line 14: / Line 28: @@
 ==External links==
-* [http://www.planetary.org/blogs/bill-nye/20120813-curiositys-marsdial-is-on.html Curiosity's Marsdial is on Mars] (The Planetary Society)
+* [http://www.planetary.org/blogs/bill-nye/20120813-curiositys-marsdial-is-on.html ''Curiosity''{{'}}s Marsdial is on Mars] (The Planetary Society)
-* [http://athena.cornell.edu/kids/sundial.html Cornell University - Sundial]
 * [https://web.archive.org/web/20110528075650/http://planetary.org/programs/projects/marsdial/ The Planetary Society's page covering the MarsDial]
-* [http://sundials.org/attachments/article/68/MakeYourMarsDial_NyeLabs.PDF Make your own MarsDial!] also [http://www.planetary.org/explore/projects/earth-dial/instructions.pdf]
+* [https://web.archive.org/web/20150518103822/http://sundials.org/attachments/article/68/MakeYourMarsDial_NyeLabs.PDF Make your own MarsDial!] also [http://www.planetary.org/explore/projects/earth-dial/instructions.pdf Planetary.org instructions] {{Webarchive|url=https://web.archive.org/web/20160304192937/http://www.planetary.org/explore/projects/earth-dial/instructions.pdf |date=2016-03-04 }}
-*[http://mars.jpl.nasa.gov/msl/multimedia/raw/?rawid=0003ML0000140000E1_DXXX&s=3 MSL's sundial on Mars]
+* [http://mars.jpl.nasa.gov/msl/multimedia/raw/?rawid=0003ML0000140000E1_DXXX&s=3 MSL's sundial on Mars]
-* [http://www.popsci.com/science/article/2012-08/how-mars-rover-curiositys-sundial-will-help-rover-see-mars-living-color How A Sundial Lets Curiosity See Mars in Living Color] (PopSci Magazine)
+{{NASAMER}}
 {{MSL}}
+{{Mars 2020}}
 {{Mars}}
+[[Category:Mars Exploration Rover mission]]
 [[Category:Mars Science Laboratory]]
+[[Category:Mars 2020]]
 [[Category:Sundials]]
 [[Category:Message artifacts]]

v t e Mars Exploration Rover
General	Spirit rover (MER-A) Opportunity rover (MER-B) Scientific information
Spirit rover	Timeline Gusev crater Surface features visited
Opportunity rover	Timeline Meridiani Planum Argo crater Eagle crater Endeavour crater Surface features visited
Instruments	APXS Cameras (Hazcam, Navcam, Pancam, Microscopic Imager) MIMOS II Mini-TES Rock Abrasion Tool (RAT) Rover embedded computers MarsDial (Calibration Target/Plauque)
Related	Computers (IBM RAD6000) DSN JPL Maestro Rocker-bogie Rockets (Delta II Heavy) Cleaning event 37452 Spirit 39382 Opportunity Roving Mars (2006 documentary) Good Night Oppy (2022 documentary) Exploration of Mars

v t e Mars Science Laboratory
General	Curiosity rover Timeline of Mars Science Laboratory
Instruments	APXS ChemCam CheMin DAN DRT Hazcam MARDI MAHLI MastCam Navcam RAD REMS Robotic arm Rover embedded computers SAM
Features	MarsDial MMRTG Rocker-bogie Sky crane
Sites	Mount Sharp (Aeolis Mons) Aeolis Palus Bradbury Landing Gale Crater Glenelg Peace Vallis Rocknest Yellowknife Bay
Rocks	Bathurst Inlet Coronation Goulburn Hottah Jake Matijevic Link Rocknest Rocknest 3 Tintina
Related	Experience Curiosity Exploration of Mars
Category Solar System portal