Astronomical characteristic
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)
Physical characteristic
temperature (range and mean -73 - 27oC)
material (red planet, chemical composition, minerals)
surface feature (lines? craters, desert, montains, cayons)
vocanos
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
methods of research
where to read about mars (encyclopedia, astronomy)
was there water before?
Photos of mars