What is "phobos"

Phobos may refer to:

Phobos ( systematic designation: ) is the innermost and larger of the two natural satellites of Mars, the other being Deimos. Both moons were discovered in 1877 by American astronomer, Asaph Hall.

Phobos is a small, irregularly shaped object with a mean radius of , and is seven times more massive than the outer moon, Deimos. Phobos is named after the Greek god, Phobos, a son of Ares (Mars) and Aphrodite (Venus) which was the personification of Horror. The name "Phobos" is pronounced or , or like the Greek .

Phobos orbits from the Martian surface, closer to its primary body than any other known planetary moon. It is indeed so close that it orbits Mars faster than Mars rotates, and completes an orbit in just 7 hours and 39 minutes. As a result, from the surface of Mars it appears to rise in the west, move across the sky in 4 hours and 15 minutes or less, and set in the east, twice each Martian day.

Phobos is one of the least reflective bodies in the Solar System, with an albedo of just 0.071. Surface temperatures range from about on the sunlit side to on the shadowed side. The defining surface feature is the large impact crater, Stickney, which takes up a substantial proportion of the moon's surface.

Images and models indicate that Phobos may be a rubble pile held together by a thin crust, and that it is being torn apart by tidal interactions. Phobos gets closer to Mars by about 2 meters every one hundred years, and it is predicted that within 30 to 50 million years it will either collide with the planet, or break up into a planetary ring.

Phobos (, , meaning "fear") is the personification of fear in Greek mythology. He is the offspring of Aphrodite and Ares. He was known for accompanying Ares into battle along with the ancient war goddess Enyo, the goddess of discord Eris (both sisters of Ares), and Phobos' twin brother Deimos (terror).

In Classical Greek mythology, Phobos is more of a personification of the fear brought by war and does not appear as a character in any myths. Timor or Timorus is his Roman equivalent. In Roman mythology, he has also been referred to as Pavor.

Phobos was the tenth album released by Canadian thrash metal/ progressive metal band Voivod. It was released on Slipdisc/Hypnotic Records in 1997. It is also the second and last album to feature bassist and vocalist Eric Forrest.

Phobos is an audio drama based on the long-running British science fiction television series Doctor Who. This audio drama was produced by Big Finish Productions and was broadcast on BBC 7 on 28 January 2007.

Phobos is the name of two fictional comic book characters appearing in books published by Marvel Comics characters. The first appeared in Dr. Strange, Sorcerer Supreme #32 (August 1991) in a story written by Roy Thomas and Jean-Marc Lofficier.

The second and current Phobos first appeared in the 2006 Ares: God of War mini-series (written by Michael Avon Oeming; art by Travel Foreman). He is the son of Ares, step-brother to Hippolyta, and a member of the Secret Warriors.

Due to the nature of gods in the Marvel Universe, in addition to the retcon surrounding the current Phobos (see below) the relationship between the two has not been explicitly explained.

Phobos, in comics, may refer to:

• Phobos (Marvel Comics), a Marvel Comics character and son of Ares
• Phobos (DC Comics), a DC Comics supervillain and enemy of Wonder Woman
• Phobos, a character in Jack Kirby's Galactic Bounty Hunters