Continuing changes is an accomplishment in modern American technology and it gives the world a step forward in finding the real truth about existing life on Mars. Hurtling in from space some 16 million years ago, a giant asteroid slammed into the surface of Mars and exploded with more power than a million hydrogen bombs. This caused huge quantities of rock and soil to fly into the thin Mars’ atmosphere. While most of the rocks fell back to the surface, some of the debris, fired upward by the blast at high velocities, escaped the weak tug of Mars’ gravity and entered into orbits of their own around the sun. Scientists believe that the earth’s gravity caught some of the debris and pulled it into the earth.
5. Martian Geology Investigations. Planning for the Scientific Exploration of Mars by Humans. Part 2.Joel S. Levine, Ph.D., James B. Garvin, Ph.D., James W. Head, Ph.D., Journal of Cosmology, Vol 12. 3636-3646.
Their acute differences in their tectonic framework and their quantities of liquid water affect the geological theories behind the formation of the surface of Earth and Mars. By investigating these similarities and differences, geologists can grasp and acquire a better understanding of the evolution of these two planets. Mars, named after the Roman war god, is known as the Red Planet due to its’ red or pink appearance as it glows in the night sky. Galileo first saw Mars around the year 1610, since then numerous others have viewed the mysterious planet. Just to name a few, Michael Carr in The Surface of Mars (1) describes the trail of Mars’ historical observations; starting with Huyghens in 1659 who verified that Mars, like Earth, had a north-south rotation in a 24-hour period, Cassini who observed polar caps on Mars in 1666, and Herschel who, in the late 1700’s, determined that Mars had seasons much like Earth.
We have also learned a lot about Mars’ make up from information gathered on missions. The United States launched Mariner 4 in 1964 and Mariners 6 and 7 in 1969, and these missions did not find life on Mars. All three of these missions were fly-bys. Mariner 4 took the first close Freedman 2 up shots of Mars. Mariners 6 and 7 analyzed the surface and atmosphere of Mars.
“Confirmation of Earth-Mass Planets Orbiting the Millisecond Pulsar PSR B1257 + 12.” Science 264 (April 22): 538-542. doi:10.1126/science.264.5158.538. 12. Wolszczan, A., and D. A. Frail. 1992.
Mars was first discovered in approximately 400BC by the Babylonians, and they named it "the star of death". Back in that time, Mars was visible by the eye, simply seen as a red "dot" in the sky, and some thought it was possibly a moving star. Mars has a very interesting geology that can tell anyone a lot about the planet. The red planet has a variety of surface features that give much information about its history. Some of the signs of impact on the planet are craters from meteors, the rough surface, impact basins, the polar ice caps th... ... middle of paper ... ...ml>.
Allan Hills 84001, a meteorite found on Antarctica in 1984, contained 3.9-4.1 billion year old carbonates that held magnetized minerals, indicating that Mars had a magnetic field for the first 500 million years of its existence, and that it turned off approximately 4 billion years ago. The cores of both Earth and Mars share some similarities, which can be attributed both planets being terrestrial and differentiated planets. Both have a central metal core, made up of iron and nickel, with a surrounding silicate mantle. The similarities, howe... ... middle of paper ... ...iveScience."
The famous meteorite to bare significant signs of life is the Allan Hills 84001 (ALH84001), classified as one of the meteorites thought to come from Mars. Due to the atmospheric data taken by the Viking Lander spacecraft sent to Mars in the 1970s. The data make it possible to know that gases trapped inside the rock is identical to the Martian atmosphere. "It is one of only 12 meteorites identified so far that match the unique Martian chemistry measured by the Viking spacecraft that landed on Mars in 1976" Scientist believed that the ALH84001 blasted off from the surface of Mars about 16 million years ago by a comet or asteroid. The rock orbited in the solar system for a few million years and finally reached Earth about 13, 000 years ago.
Some proponents include Gyon de Montlivant, who proposed that life came from moon, H.E. Richter, who suggested life came from meteorites or comets, but Svante Arrhenius proposed this theory. While this idea may seem straight out of a science fiction movie, some evidence suggests that an extraterrestrial origin of life may not be such impossible idea. One argument that supports the panspermia theory is the emergence of life soon after the heavy bombardment period of earth, between 4 and 3.8 billion years ago. During this period, researchers believe the Earth endured an extended and very powerful series of meteor showers.
Global warming is clear evidence that the current global population and industrialization has put the sustainability of Earth in doubt. The UN predicts the world’s population will reach 9.6 billion by 2050 (“Challenges”). The urgency to establish a habitable colony on Mars was made clear by NASA chief Charles Bolden. "If this species is to survive indefinitely, we need to become a multi-planet species; we need to go to Mars, and Mars is a stepping stone to other solar systems” (Smith). Mars rovers have made many monumental discoveries while canvassing and sampling the red planet’s surface which has lead scientists to believe Mars is a good candidate for terraforming.