Many meteorites from Mars have been found recently. Close examination of at least one of these meteorites suggests the presence
of life. Is there life on Mars today? This site gives you everything you need to make you own conclusions.
Spacecraft which came after the early Mariners have given us images from the surface itself. In the mid seventies, the Viking Landers
gave us the first of these images. Mars Odyssey did detailed mapping. The Mars Exploration Rovers spent about six years crawling around the
surface of Mars.
How does one land on Mars? It isn’t easy. One way to do it is with air bags. Most recently, the Mars Science Laboratory endured Seven Minutes
of Terror. The Mars Global Surveyor spacecraft took more than 100,000 images! Images from Mars seem to show evidence of sedimentary rock on
Mars. Does this mean that water once flowed freely on the surface of Mars? Look at this image of the crater Yuty, which seems to have made a
splat when the impactor hit permafrost.
The latest mission to the surface of Mars is the Mars Scientific Laboratory, which was given the name Curiousity. We now have incredibly high
resolution images from the surface.
The surface of Mars somewhat resembles the desert area of northwest Arizona here on Earth, just outside Tuba City.. Shooting for the movie ‘The
Martian’ had its own challenges in order to make it real.
Can we expect humans to travel to Mars soon?
Mars has a radius of 3396 km, which is
approximately one half that of Earth. This gives
the planet about the same surface area as the land
area of Earth.
Mars rotates in 24 hours 37 minutes at the sidereal rate,
referenced to the stars. Its synodic day, from noon to
noon, is 24 hours 39 minutes. This is very near Earth’s
rate of rotation. The day on the surface of Mars would
seem very familiar to an earthling.
Mars orbits the Sun at an average distance of 5.2
A.U. and takes 1.87 years to complete one
revolution. Because of its axial tilt, it has seasons,
just as Earth. But each of its seasons is about
twice as long.
The atmosphere of Mars consists of 96%
carbon dioxide. The remaining 3% is mostly nitrogen.
The pressure at the surface varies from from 4.0 to 8.7
mb (depending on season). We occasionally see clouds
in Mars' thin atmosphere.
Since it lacks an appreciable iron core, Mars has
no self-generated magnetic field. This results in
radiation levels at the surface that would be
harmful for human beings.
Foolish Earthling! Mars has no rings!