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Both Phobos and Deimos were discovered in 1877 by American astronomer Asaph Hall. The moons appear to have surface materials similar to many asteroids in the outer asteroid belt, which leads most scientists to believe that Phobos and Deimos are captured asteroids.
originally posted by: MaxTamesSiva
a reply to: anonentity
How come Jonathan Swift mentioned the two moons of Mars in Gulliver's Travel in 1726? More than 150 years before it was said to be discovered?
Perhaps they were discovered but not documented, or perhaps it was just coincidence. After all the Heliocentric system was poo pooed by many but turned out to be true, Maybe Swift heard a story from an astronomer colleague and ran with it, but the rest is history-just like Da Vinci's helicopter.
This Load-stone is under the Care of certain Astronomers, who from Time to Time give it such Positions as the Monarch directs. They spend the greatest Part of their Lives in observing the celestial Bodies, which they do by the Assistance of Glasses, far excelling ours in Goodness. For, although their largest Telescopes do not exceed three Feet, they magnify much more than those of a Hundred with us, and shew the Stars with greater Clearness. This Advantage hath enabled them to extend their Discoveries much farther than our Astronomers in Europe. They have made a Catalogue of ten Thousand fixed Stars, whereas the largest of ours do not contain above one third Part of that Number. They have likewise discovered two lesser Stars, or Satellites, which revolve about Mars; whereof the innermost is distant from the Center of the primary Planet exactly three of his Diameters, and the outermost five; the former revolves in the space of ten Hours, and the latter in Twenty-one and an Half; so that the Squares of their periodical Times, are very near in the same Proportion with the Cubes of their Distance from the Center of Mars; which evidently shews them to be governed by the same Law of Gravitation, that influences the other heavenly Bodies.
originally posted by: eManym
Mars is a very desolate place not very hospitable to life of any kind as we know it. Here are some points:
1. Mars is a very dry place with no water in any significant amount although scientist see a discoloration in surface areas and assume that its water with no proof of what it is.
2. Mars is a highly electrified place with frequent whirlwinds that scorch the surface giving the impression that something is moving on the surface. Well it is, an electrified whirlwind.
3. The atmosphere is made of of mostly C02. Carbon dioxide: 95.32 percent. Nitrogen: 2.7 percent and a few trace gases to be precise.
4. The sky on Mars is a butterscotch color during the day with a rose color during sunrise and sunset. The atmosphere is only blue in the vicinity of the Sun in the martian sky.
5. Anomalies on Mars are nothing but rocks with strange shadowing or debris that has fallen off the rover.
5. It is unknown if Phobos is hollow although it has the strange feature of a large crater on one side.
A giant deposit of buried ice on Mars contains about as much water as Lake Superior does here on Earth, a new study reports.
The ice layer, which spans a greater area than the state of New Mexico, lies in Mars' mid-northern latitudes and is covered by just 3 feet to 33 feet of soil. It therefore represents a vast possible resource for future astronauts exploring the Red Planet, study team members said.
"This deposit is probably more accessible than most water ice on Mars, because it is at a relatively low latitude and it lies in a flat, smooth area where landing a spacecraft would be easier than at some of the other areas with buried ice," co-author Jack Holt, of the University of Texas, Austin, said in a statement. [Photos: The Search for Water on Mars]