• WordNet 3.6
    • n Phobos the larger of the two satellites of Mars
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Century Dictionary and Cyclopedia
  • Interesting fact: In Gulliver's Travels Jonathan Swift described the two moons of Mars, Phobos and Deimos, giving their exact size and speeds of rotation. He did this more that a hundred years before either moon was discovered
    • n Phobos The inner of the two satellites of the planet Mars, discovered by Asaph Hall at Washington, in August, 1877. This extraordinary body revolves in the plane of the equator of Mars, at a distance of only about 3, 700 miles from the surface of the planet, but as it is probably only about five and a half miles in diameter, it would appear only one sixth of the apparent diameter of our moon at the zenith, and on the horizon, owing to the enormous parallax, only about one fourteenth of the same. At the equinoxes it is in eclipse about one fifth of the time, or double that proportion of the time between sunset and sunrise. At the solstices it does not suffer eclipse. It revolves about its primary in 7 hours, 39 minutes, and 14 seconds, and as Mars revolves on its axis in 24 hours, 37 minutes, and 22. 7 seconds, it follows that the satellite appears to an observer on Mars to rise in the west and set in the east, its return to his meridian occurring in 11 hours, 6 minutes, and 23 seconds, but, owing to its close proximity, its velocity will appear to be much greater. At a station on the equator of Mars (where the satellite always passes through the zenith), it will, out of its 11 hours and 6 minutes of period, pass only 3 hours and 20 minutes above the horizon against 7 hours anil 46 minutes below.
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In literature:

On February 10 I had my first vision of Mars' two moons, known to our astronomers as Diemos and Phobos.
"The Planet Mars and its Inhabitants" by Eros Urides and J. L. Kennon
The inner one, Phobos, is considerably larger, having a diameter of about twenty miles.
"A Journey in Other Worlds" by John Jacob Astor
Phobos is only 3.700 miles from the surface of Mars.
"The Birth-Time of the World and Other Scientific Essays" by J. (John) Joly
Phobos is 5,800 miles from the center of the planet and only 3,700 from the surface.
"Other Worlds" by Garrett P. Serviss
I vote we drop on him first and let him carry us towards Phobos.
"A Honeymoon in Space" by George Griffith
I want you to get in that groundcar, alone, and take off like Phobos rising.
"Rebels of the Red Planet" by Charles Louis Fontenay
The Mirans knew their business though, for they started in on the IP station on Phobos.
"The Ultimate Weapon" by John Wood Campbell
It took a long time to reach Phobos.
"The Planet Strappers" by Raymond Zinke Gallun
Two small moons (hardly larger than the city of Paris) revolve rapidly round Mars; they are called Phobos and Deimos.
"Astronomy for Amateurs" by Camille Flammarion
You should weigh seventy-two pounds on Mars, and eight pounds at the distance of Phobos.
"Pharaoh's Broker" by Ellsworth Douglass
Phobetor is from the Greek +phobos+, 'fear,' because it was his office to terrify mortals.
"The Metamorphoses of Ovid" by Publius Ovidius Naso
Alice at the Phobos Oasis.
"The Memory of Mars" by Raymond F. Jones
Phobos, in fact, revolves three times round Mars in the same time that Mars can turn round once.
"The Story of the Heavens" by Robert Stawell Ball
Phobos is 36 miles in diameter.
"To Mars via The Moon" by Mark Wicks
Phobos, we have seen, completes more than three revolutions while Mars rotates once.
"A Popular History of Astronomy During the Nineteenth Century" by Agnes M. (Agnes Mary) Clerke
The diameter of Phobos was at first thought to be six miles, and that of Deimos, seven.
"Astronomy of To-day" by Cecil G. Dolmage
Phobos is an airless world, and yet so small that rockets are impractical.
"B-12's Moon Glow" by Charles A. Stearns
But the darkness on the ground remained until the jagged lump of light that was Phobos, the nearer moon, arose out of the west.
"Stamped Caution" by Raymond Zinke Gallun
As for refueling for the return trip, we can knock a chunk off of Phobos for reaction mass.
"Atom Drive" by Charles Louis Fontenay
The constellation was also called Semivir, Chiron, Phobos, Minotaurus, etc.
"Astronomical Curiosities" by J. Ellard Gore

In news:

An artist's rendering of the Russian Phobos-Grunt probe approaching Mars, with the small moon Phobos visible at lower left.
To save face for the Phobos- Grunt probe failure, Russia blames US radar.
The Phobos- Grunt 's lander was equipped with a small shovel to put about eight ounces of dirt into a tiny capsule to return to Earth.
Voivod 21ST Century Schizoid Man Phobos.
The Curiosity rover's latest Mars photo captured the planet's largest Martian moon, Phobos , during a Martian evening, revealing the satellite as a faint crescent moon.
This close up from a photo by NASA's Mars rover Curiosity shows the Martian moon Phobos as a faint crescent in the Martian evening sky.
To save face for the Phobos -Grunt probe failure, Russia blames US radar.
Phobos will embrace 'Darkness'.
Military spokesman reports Phobos-Grunt re-entry over Pacific Ocean.
Officials from NASA and the European Space Agency have pitched in to help save the Russian Phobos-Grunt probe, which was supposed to fly to a Martian moon to collect soil samples but is instead stuck in orbit around Earth.
The unmanned Phobos-Grunt probe is seen in the Baikonur Cosmodrome, Kazakhstan.
Scientists will use these photos to nail down the orbits of Phobos and Deimos precisely, and to determine how much they have changed over the last few years, researchers said.
If Phobos-Grunt comes down at the in the predicted window it will fall over a stretch of empty ocean west of the Indonesian island of Java, according to a re-entry projection map Roscosmos published with the update.
President says Phobos probe's problems could lead to criminal prosecution.
The uncontrolled tumble of Phobos-Grunt into Earth's atmosphere is being eyed as a possible way to sharpen computer tools to more accurately calculate re-entry predictions.

In science:

Data (full symbols) from PHOBOS and STAR are plotted as a function of η − ybeam and reflected (open symbols) across the LHC −ybeam value.
Predictions for the LHC heavy ion programme
Alver et al. [PHOBOS Collaboration], “High transverse momentum triggered correlations over a large pseudorapidity Phys.
Summary of Theoretical Physics for ICPAQGP 2010
Beam-Beam Counters (BBC) previously used at PHOBOS were installed on either side of the interaction point to allow for a basic collision trigger.
AnDY : Overview and Plans Feasibility Test of Large Rapidity Drell-Yan Production at RHIC
After this, the split-dipole magnet from the PHOBOS experiment will be installed along with fiber trackers.
AnDY : Overview and Plans Feasibility Test of Large Rapidity Drell-Yan Production at RHIC
The area of the trapped surface versus impact parameter, with the comparison of the numerical studies by Lin and myself shown by points and analytic curves from . (b) Experimental data from PHOBOS collaboration, on the charge particle multiplicity at RHIC per participant nucleon.
Toward the AdS/CFT dual of the "Little Bang"
It was then extended to wider ∆η range up to 4 units by the PHOBOS experiment with a wider detector acceptance 15 (Fig. 7b).
Observation of a "Ridge" correlation structure in high multiplicity proton-proton collisions: A brief review
With more detailed experimental study, either now at the SPS, or soon at RHIC (STAR will study event-by-event fluctuations in pT , N , particle ratios, etc; PHENIX and PHOBOS in N only) it should be possible to disentangle the different effects we describe.
How to Find the QCD Critical Point
Particle multiplicities were estimated from the charged hadron multiplicity measurements of the RHIC PHOBOS experiment .
Can hadronic rescattering explain the large elliptic flow and small HBT radii seen at RHIC?
Particle multiplicities were estimated from the charged hadron multiplicity measurements of the RHIC PHOBOS experiment .
Comparison of hadronic rescattering calculations of elliptic flow and HBT with measurements from RHIC
The widths of the distributions and the flattening near η = 0 is similar to data from PHOBOS .
Comparison of hadronic rescattering calculations of elliptic flow and HBT with measurements from RHIC
Particle multiplicities were estimated from the charged hadron multiplicity measurements of the RHIC PHOBOS experiment .
Testing a hadronic rescattering model for RHIC collisions using the subdivision method
This manuscript contains a summary of the latest physics results from PHOBOS, as reported at Quark Matter 2006.
Latest Results from PHOBOS
Highlights include the first measurement from PHOBOS of dynamical elliptic flow fluctuations as well as an explanation of their possible origin, two-particle correlations, identified particle ratios, identified particle spectra and the latest results in global charged particle production.
Latest Results from PHOBOS
Over the last year, PHOBOS has continued to analyze the large dataset obtained from the first five runs (2000-2005) of the Relativistic Heavy Ion Collider (RHIC) at Brookhaven National Laboratory.
Latest Results from PHOBOS
To a large extent, one of the primary goals of PHOBOS to obtain a broad survey of the global properites of charged particle production is nearing completion.
Latest Results from PHOBOS