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Topic: Transit of Phobos from Mars

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Transit of Jupiter from outer planets

Transit of Deimos from Mars

Shadow of Phobos on Mars

Transit of Earth from Mars

Astronomical transit

Transit of asteroids

Transit of Earth from Saturn

Transit of Earth from Jupiter

Transit of Venus from Mars

Transit of Saturn from outer planets

Phobos (moon)

Deimos (moon)

List of features on Phobos and Deimos

Phobos (god)

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	ESA - Rosetta - Rosetta delivers Phobos transit animation and 'sees' Mars in stereo
		During Rosetta's recent Mars swingby, the OSIRIS cameras captured a series of images of Mars and of Phobos transiting Mars' disk.
		Phobos is the inner moon of Mars; Phobos orbits closer to a major planet compared to any other moon in our solar system (less than 6000 km above the surface of Mars), and it is also one of the smallest known moons in the solar system.
		Although Rosetta's direction relative to Mars was relatively constant during the approach phase, the surface view of Mars changed due to the rotation of the planet.
	www.esa.int /SPECIALS/Rosetta/SEM9R6N0LYE_0.html (477 words)

	Astronomy on Mars - Wikipedia, the free encyclopedia (Site not responding. Last check: 2007-10-09)
		Mars has an axial tilt of 25.2°, quite close to the value of 23.45° for Earth, and thus Mars has seasons of spring, summer, autumn, winter as Earth does (if the axial tilt was 0° there would be no seasons).
		Thus, for temperatures on Mars, spring is approximately the mirror image of summer and autumn is approximately the mirror image of winter, and if Mars had a circular orbit the maximum and minimum temperatures would occur a couple of days after the summer and winter solstices rather than about one month after as on Earth.
		Mars Global Surveyor imaged the Earth and Moon on May 8 2003 13:00 UTC, very close to maximum angular elongation from the Sun and at a distance of 0.930 AU from Mars.
	www.bucyrus.us /project/wikipedia/index.php/Astronomy_on_Mars (3026 words)

	CONK! Encyclopedia: Astronomical_transit (Site not responding. Last check: 2007-10-09)
		A transit is the astronomical event that occurs when one celestial body appears to move across the face of another celestial body, as seen by an observer at some particular vantage point.
		A transit of Mars across Jupiter on 12 Sep 1170 was observed by the monk Gervase at Canterbury, and by Chinese astronomers.
		During a transit there are four "contacts", when the circumference of the small circle (small body disk) touches the circumference of the large circle (large body disk) at a single point.
	www.conk.com /search/encyclopedia.cgi?q=Astronomical_transit (671 words)

	Mars - Wikipedia, the free encyclopedia (Site not responding. Last check: 2007-10-09)
		Mars has only a quarter the surface area of the Earth and only one-tenth the mass (though its surface area is approximately equal to that of the Earth's dry land because Mars lacks oceans).
		The atmosphere on Mars is 95 percent carbon dioxide, 3 percent nitrogen, 1.6 percent argon, and traces of oxygen and water.
		The datum for Mars is defined by the fourth-degree and fourth-order spherical harmonic gravity field, with the zero altitude defined by the 610.5 Pa (6.105 mbar) atmospheric pressure surface (approximately 0.6% of Earth's) at a temperature of 273.01 K. This pressure and temperature correspond to the triple point of water.
	www.secaucus.us /project/wikipedia/index.php/Mars_(planet) (3182 words)

	Phobos (moon) - Wikipedia, the free encyclopedia (Site not responding. Last check: 2007-10-09)
		Phobos (foe'-bus, Greek Φόβος) is the larger and innermost of Mars' two moons, named after Phobos, son of Ares (Mars) from Greek Mythology.
		Phobos was discovered by American astronomer Asaph Hall on August 18, 1877 at the US Naval Observatory in Washington, D.C at about 09:14 GMT (contemporary sources, using the pre-1925 astronomical convention that began the day at noon, give the time of discovery as "August 17 16:06" Washington mean time).
		Phobos was photographed close-up by Mariner 9 in 1971, Viking 1 in 1977, Phobos 2 in 1988, Mars Global Surveyor in 1998 and 2003, and by Mars Express in 2004.
	www.secaucus.us /project/wikipedia/index.php/Phobos_(moon) (879 words)

	Phobos (moon) (Site not responding. Last check: 2007-10-09)
		Phobos is the larger and innermost of Mars' two moonss, named after Phobos, son of Ares (Mars) from Greek Mythology.
		Phobos was discovered on August 18, 1877 at about 09:14 UTC (given in contemporary sources as "August 17 16:06" Washington mean time using the old astronomical convention of beginning a day at noon, so 12 hours must be added to get the actual local mean time).
		Phobos was first photographed close-up by Mariner 9 in 1971, Viking 1 in 1977, Phobos 2 in 1988, and by Mars Global Surveyor in 1998 and 2003.
	www.factsite.co.uk /en/wikipedia/p/ph/phobos__moon_.html (767 words)

	Transit of Mercury from Mars (Site not responding. Last check: 2007-10-09)
		A transit of Mercury across the Sun as seen from Mars takes place when the planet Mercury passes directly between the Sun and Mars, obscuring a small part of the Sun's disc for an observer on Mars.
		Transits of Mercury from Mars are much more common than transits of Mercury from Earth: there are several per decade.
		The Mars Rovers Spirit and Opportunity might be able to observe the transit on January 12 2005 (from 14:45 UTC to 23:05 UTC) if they are still functional at that time and if their cameras are capable of sufficient resolution.
	www.factsite.co.uk /en/wikipedia/t/tr/transit_of_mercury_from_mars.html (322 words)

	Mars (planet) (Site not responding. Last check: 2007-10-09)
		Mars is the fourth planet from the Sun in the solar system, named after the Roman god of war (the counterpart of the Greek Ares), on account of its blood red color as viewed in the night sky.
		Mars has only a quarter the surface area of the Earth and only 1/10th the mass (though because it lacks oceans the area of Mars' accessible dry land is approximately equal to that of the Earth's dry land).
		Mars Odyssey determined that there are vast deposits of water ice in the upper three meters of Mars's soil within 60° latitude of the south pole.
	www.bidprobe.com /en/wikipedia/m/ma/mars__planet_.html (1701 words)

	Transit of Phobos from Mars - Wikipedia, the free encyclopedia
		A transit of Phobos across the Sun as seen from Mars takes place when Phobos passes directly between the Sun and a point on the surface of Mars, obscuring a large part of the Sun's disc for an observer on Mars.
		Thus transits of Phobos happen during Martian autumn and winter in the northern hemisphere and the southern hemisphere, roughly symmetrically around the winter solstice.
		Mars Rover Opportunity photographed transits of Phobos on March 7, 2004 and March 10, 2004 and March 12, 2004.
	en.wikipedia.org /wiki/Transit_of_Phobos_from_Mars (722 words)

	Transit of Earth from Mars
		A transit of Earth across the Sun as seen from Mars takes place when the planet Earth passes directly between the Sun and Mars, obscuring a small part of the Sun's disc for an observer on Mars.
		No one has ever seen a transit of Earth from Mars, but the next one will take place on November 10 2084, and could be observed by hypothetical future Mars colonists.
		Transits of Earth from Mars follow a 284-year cycle, occurring at intervals of 100.5, 79, 25.5, 79 years in either May or November.
	publicliterature.org /en/wikipedia/t/tr/transit_of_earth_from_mars.html (483 words)

	Mars Encyclopedia Article, Definition, History, Biography (Site not responding. Last check: 2007-10-09)
		The datum for Mars is defined by the fourth-degree and fourth-order spherical harmonic gravity field, with the zero altitude defined by the 610.5 Pa (6.105 mbar) atmospheric pressure surface (approximately 0.6% of Earth's) at a temperature of 273.16 K. This pressure and temperature correspond to the triple point of water.
		Mars Odyssey determined that there are vast deposits of water ice in the upper three meters of Mars' regolith within 60° latitude of the south pole.
		Mars is shown as being previously inhabited by an ancient race of aliens, who created a machine for producing a breathable atmosphere on the planet.
	popularityguide.com /encyclopedia/Mars (4504 words)

	Mars' natural satellites - Wikipedia, the free encyclopedia (Site not responding. Last check: 2007-10-09)
		Both Phobos and Deimos are tidally locked with Mars, always pointing the same face towards it.
		As seen from Mars, Phobos has an angular diameter of about 12', while Deimos has an angular diameter of about 2'.
		Phobos transits the Sun, as seen by Mars Rover Opportunity on March 10 2004.
	www.southhouston.us /project/wikipedia/index.php/Mars'_natural_satellites (255 words)

	* Phobos - (Astronomy): Definition (Site not responding. Last check: 2007-10-09)
		This is a collection of all the color imagery taken by Phobos II containing both Phobos and Mars, and Mars alone as shown in the upper right-hand corner...
		Phobos orbits at a distance of less than 6000 km from the surface of Mars (9270 km from its centre) and is the largest of both with a maximum diameter equal to 27 km...
		Phobos is oblong in shape and heavily scarred with craters.
	www.bestknows.com /astronomy/phobos.html (760 words)

	Mars Moons Phobos and Deimos - Planetary News \| The Planetary Society
		Mars Moons Phobos and Deimos - Planetary News
		Planetary News: Mars Moons Phobos and Deimos (2007)
		There are no news stories to display from the year 2007 for the subject Mars Moons Phobos and Deimos.
	planetary.org /news/subjects/mars_moons_phobos_and_deimos (52 words)

	CONK! Encyclopedia: Transit_of_Earth_from_Mars (Site not responding. Last check: 2007-10-09)
		This cycle corresponds fairly closely to 151 Mars orbits, 284 Earth orbits, and 133 synodic periods, and is analogous to the cycle of transits of Venus from Earth, which follow a cycle of 243 years (121.5, 8, 105.5, 8).
		This permitted Charles Augustus Young to attempt a careful measurement of the oblateness (polar compression) of Mars during the 1879 event.
		This is close to the modern value of 1/154 (many sources will cite somewhat different values, such as 1/193, because even a difference of only a couple of km in the values of Mars' polar and equatorial radii gives a considerably different result).
	www.conk.com /search/encyclopedia.cgi?q=Transit_of_Earth_from_Mars (500 words)

	Shadow of Phobos on Mars (Site not responding. Last check: 2007-10-09)
		Locations on the Martian surface that the shadow passes over experience a transit of Phobos across the Sun, which could also be called a partial eclipse of the Sun by Phobos.
		Mars Global Surveyor orbits Mars in a sun-synchronous polar orbit with orbital period 117.65 minutes, moving from south pole to north pole, and continuously points its camera straight down.
		Phobos is so close to Mars that it is not visible south of 70.4°S or north of 70.4°N; for some days in the year, its shadow misses the surface entirely and falls north or south of Mars.
	www.worldhistory.com /wiki/S/Shadow-of-Phobos-on-Mars.htm (1169 words)

	Mars (planet) - Open Encyclopedia (Site not responding. Last check: 2007-10-09)
		Mars has two small moons, Phobos and Deimos, both small and oddly shaped, possibly captured asteroids.
		Its symbol is a stylized representation of the god Mars' shield and spear: a circle with a small arrow pointing out from behind it (Unicode: ♂).
		Both missions landed successfully in January 2004 and have met or exceeded all their targets; while a 90-day nominal mission was planned, as of November 2004, their missions have been extended twice and they continue to return science, although some mechanical faults have occurred.
	open-encyclopedia.com /Mars_(planet) (1950 words)

	Phobos - Explore the Cosmos \| The Planetary Society
		Phobos is the larger and inner of Mars’ two tiny moons.
		When Mars is near its vernal and autumnal equinoxes, the equatorial orbit of Phobos carries it across the Sun in a series of daily eclipses.
		Phobos is riddled with craters, including the giant Stickney crater on one side.
	www.planetary.org /explore/topics/our_solar_system/mars/phobos.html (230 words)

	Phobos (moon) (Site not responding. Last check: 2007-10-09)
		Phobos is the larger and innermost of Mars (planet)Mars' two natural satellitemoons, named after Phobos_(mythology)Phobos, son of Ares/ (Mars) from Greek Mythology.
		Phobos is a dark body that appears to be composed of C-type asteroidC-type surface materials.
		The most prominent feature on Phobos is the large crater named Stickney craterStickney, the maiden name of Asaph Hall's wife Angeline StickneyChloe Angeline Stickney Hall.
	www.infothis.com /find/Phobos_(moon) (835 words)

	Mars - Art History Online Reference and Guide
		In 2003, methane was also discovered in the atmosphere by Earth-based telescopes, and possibly confirmed in March 2004 by the Mars Express Orbiter.
		In Ancient Egypt, this planet was known as "Horus the Red." Because of Mars' apparent retrograde motion, Egyptians said that it "traveled backwards." Also, Cairo's name comes from "Al Qahira," which means the planet Mars in ancient Arabic.
		Chinese and Japanese culture designates the planet Mars with the characters 火星, which translate as "Fire Star." This is based on Five Elements which was traditionally used to classify natural elements.
	www.arthistoryclub.com /art_history/Mars (2797 words)

	Astronomical transit (Site not responding. Last check: 2007-10-09)
		Cases where the objects are comparable sizes are known as eclipses; cases where the nearer object appears larger and completely hides the more distant object are known as occultations.
		Comparison of Dr. Maskelyne's catalogue, with that deduced from the new transit instrument (The nautical almanac and ast...
		Addenda to appendix no. 9,: (on the determination of time by means of the transit instrument); and to appendix no. 11, (...
	hallencyclopedia.com /Astronomical_transit (808 words)

	Phobos
		In Greek mythology, Phobos ("fright") was the personification of fear and horror.
		In the centre [of the Shield of Herakles] was Phobos (Fear) worked in adamant, unspeakable, staring backwards with eyes that glowed with fire.
		Mars moon Phobos transits the Sun, as seen by Mars Rover Opportunity on March 10, 2004.
	www.mlahanas.de /Greeks/Mythology/Phobos.html (255 words)

	wikien.info: Main_Page (Site not responding. Last check: 2007-10-09)
		[Opportunity image gallery: Sol 42] (small images of the March 7 2004 grazing transit are near the top of the page).
		[Opportunity image gallery: Sol 45] (small images of the March 10 2004 transit are near the middle of the page).
		[Opportunity image gallery: Sol 47] (small images of the March 12 2004 transit are near the bottom of the page).
	pardus.info /index.php?title=Transit_of_Phobos_from_Mars (717 words)

	Spatial and temporal patterns of solar eclipses by Phobos on Mars
		The spatial and temporal patterns associated with motion of the shadow of Phobos across the surface of Mars are quite different than those associated with solar eclipses on Earth.
		Outside that band, the density of coverage decreases slowly with increasing distance from the equator, until the limiting latitudes are reached.
		During epochs, like the present, when the obliquity of Mars is in excess of 21.2°, there are portions of each year during which no eclipses occur.
	www.agu.org /pubs/crossref/2005/2003JE002209.shtml (338 words)

	SPACE.com -- Moon-Watching Mars Rover Catches Deimos Crossing the Sun
		Turning their respective camera systems up into the martian sky, the robots have caught sight of the moons of Mars — Phobos and Deimos — scooting across the face of the Sun.
		Phobos could break up due to gravitational forces and form a ring of debris about Mars — either event estimated to be millions of years into the future.
		The Mars machinery has operated more than four times as long as their successful three-month primary missions.
	www.space.com /missionlaunches/050322_mars_moon.html (506 words)

	TRANSIT OF EARTH FROM MARS FACTS AND INFORMATION (Site not responding. Last check: 2007-10-09)
		Transits of Earth from Mars follow a 284-year cycle, occurring at intervals of
		Jean_Meeus & Edwin_Goffin, ''Transits of Earth as Seen from Mars'', Journal of the British Astronomical Association, 93 (1983), 120–123 http://adsbit.harvard.edu/cgi-bin/nph-iarticle_query?1983JBAA...93..120M
		Charles_Augustus_Young, ''Measures of the Polar and Equatoreal Diameters of Mars, made at Princeton, New Jersey, U.S.'', The Observatory, 3 (1880), 471 http://adsbit.harvard.edu/cgi-bin/nph-iarticle_query?journal=Obs&year=1880&volume=3&page_ind=420&letter=.&type=SCREEN_GIF
	www.mrdefine.com /transit_of_Earth_from_Mars (480 words)

	The Planetary Society
		Mars Exploration Rovers Update: Spirit and Opportunity Shake Some Dust and Return to Exploring
		Mars Exploration Rovers Rove Out of Dust Storms
		Visions of Mars, the first Martian Library is on its way to the Red Planet!
	planetary.org (209 words)

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