Why we need send the exploration rovers to the plants (especially Mars)

The problem of the resource shortage along with the growing population is a biggest challenge nowadays. One of the best ways to solve the problem is that we need find plants is vaguely Earth-like, and therefore the planet where life might have evolved. That is why we sent exploration rovers to the mars. It is the only planet in the solar system that human beings have any hope of landing on, walking on and exploring in a traditional sense any time soon it is the only planet that might be terraformed and turned into an Earth-like planet. Why are we sending robotic rovers rather than sending people like we did when we explored the Moon?

The first and most important reason is the bad record for sending the probes , for example different nations have sent more than 30 probes toward Mars, but fewer than one-third of those probes have survived the trip. The second reason is cost. Sending people would take a minimum of 100,000 pounds of vehicle, equipment, food and water to get a small team of people to plant. If a million dollars a kilogram, that's $100 billion right there. And chances are that a manned mission would cost more per pound than a robotic mission because of the significant safety margins needed for human passengers. Another big consideration is the cosmic radiation that astronauts would absorb during such a long mission, and how to block it. Much of this radiation is blocked on Earth by the Earth's magnetic field. Mars has no magnetic field.
That leaves us with the option of sending exploration rovers with human beings instead of send people.

Feature rovers capability

The rover main mission is to take images and spectra daily. Scientists will command the vehicle to go to rock and soil at the targets of interest and evaluate their composition and their texture at microscopic scales. Rocks and soils will be analyzed with a set of five instruments on each rover, and a special tool called the "RAT," or rock abrasion tool, will be used to expose fresh rock surfaces for study. The following is the major capability of the feature rovers.

• The rovers can generate power with different form of energy (solar power, nuclear power etc.) and store it in their batteries.

• The rovers can take color, stereoscopic images of the landscape with a pair of high-resolution cameras

• They can also take thermal readings with a separate thermal-emission spectrometer that uses the mast as a periscope.

• Scientists can choose a point on the landscape and the rover can drive over to it. The rovers are autonomous -- they drive themselves, because the time lag for radio signals to travel between Earth and Mars is too great for the rovers to be radio controlled. Three pairs of black-and-white cameras on the front, back and mast of the rover let the robot see its surroundings and navigate around obstacles.

• The rovers can use a drill, mounted on a small arm, to bore into a rock. This drill is officially known as the Rock Abrasion Tool (RAT).

• The rovers have a magnifying camera, mounted on the same arm as the drill that scientists can use to carefully look at the fine structure of a rock.

• The rovers have a mass spectrometer that is able to determine the composition of iron-bearing minerals in rocks. This spectrometer is mounted on the arm, as well.

• Also on the arm is an alpha-particle X-ray spectrometer that can detect alpha particles and X-rays given off by soil and rocks. These properties also help to determine the composition of the rocks.

• There are magnets mounted at three different points on the rover. Iron-bearing sand particles will stick to the magnets so that scientists can look at them with the cameras or analyze them with the spectrometers.

• The rovers can send all of this data back to Earth using one of three different radio antennas.