Astronomy On Mars

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Astronomy On Mars

Astronomy on Mars

2 moons- Phobos and DeimosIrregularly shaped- probably Asteroids caught by Mars' gravitational pull.

Sand, rocks, mountains, canyons, volcanoes, impact craters, (two things along with crustal movement and atmospheric conditions such as dust storms that have altered the surface of Mars.)

Surface conditions/terrain

Moons

Atmosphere

Mars Global Surveyor found only traces of a magnetic field in some areas in the southern hemisphere from 4 billion years ago that remain. There is also only a 2 year launch window for rovers.

Rock called "John Klein showed evidence of conditions favorable for life with geological and mineralogical evidence for sustained liquid water

Mars' moons are among the smallest in the solar systemPhobos orbits only 6,000 km (3,700 miles) above Mars' surface- closer than any other known moon in the solar system.

Phobos orbits Mars three times a day, Deimos takes 30 hours for each orbit. Phobos is gradually spiraling towards Mars- Within 50 million years it will either crash into Mars or break up and form a ring around the planet.

Mars has seasons because of tilt of its rotational axis. Temperature can be as high as 70 degrees Fahrenheit (20 degrees Celsius) or as low as -225 degrees Fahrenheit (-153 Celsius)

Spring in the northern hemisphere (autumn in the southern) is the longest season at 194 Sols (Martian days), and Autumn in the northern hemisphere (spring in

the southern) is the shortest at 142 Sols. Northern winter/southern summer is 154 Sols, and northern summer/southern winter is 178 Sols. A Martian year is about 687 Earth days.

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What do you need to know about Mars in order to land a rover there?

Climate

Location- orbit size around sun- 141,637,725miles/227,943,824km128,409,598miles/206,655,215km(closest) - 154,865,853miles/249,232,432km(farthest)Orbit circumference- 1,429,085,052km/887,992,283miles

Gravity: Metric- 3.71 m/s2 English- 12.2 ft/s2Surface Area: About half the size of Earth. 144,371,391 km2/55,742,106 square miles

Figure 1. Craters on the Surface on Mars

Figure 2. Earth and Martian Magnetic Fields

Figure 3. Geometry of Mars' solar conjunction

Figure 4. How do you get to Mars

Resources: http://solarsystem.nasa.gov/planets/profile.cfm?Object=Marshttp://www.jpl.nasa.gov/news/fact_sheets/mars-science-laboratory.pdfhttp://www.astronomytoday.com/astronomy/mars.html


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