The Planet Mars
Here are some of the things we usually want to know regarding the third
planet mars compare to Earth and Sun.
size in diameter (6,800 km), mass (0.11 of Earth mass)
periods of self-rotation (24 hr 37 min) and around the sun (687 days)
distance from the Sun (mean, 228 million km, perihelion, aphelion, )
distance from Earth (perihelion, 56 million km; aphelion, 101 million km)
number and orbits of satellites, periods etc
Phobos (inner moon, diameter 11 km, period 7 hr 39 min, less than rotation
of marks (24 hr 37 min) and rise in the west and set in the east.
Deimos (outer moon, diameter 6 km, period 30.3 hrs)
temperature (range and mean -73 - 27oC)
material (red planet, chemical composition, minerals)
surface feature (lines? craters, desert, montains, cayons)
Chemical and geological characteristic
(BR>atmosphere (composition and pressure, carbon dioxide, nitrogen, argon, P=7-10 mb)
research on mars and discoveries
active plate tectonics?
Science of Mars
Compare Drainage Channels on Earth and Mars
Mars Society at Yahoo
General Feature of Mars
Atmosphere on Mars in Science.NASA
First Three-Dimensional View of the North Polar Region of Mars from MOLA
methods of research
where to read about mars (encyclopedia, astronomy)
was there water before?
Photos of mars