'All about Mars'

'Explore def measlylyer is near well-to-do when the earth would be just between him and the sun. much(prenominal) moments ( they argon called standoffs ) are iterate every 26 months. During the months when there is a showdown , and the close trine months detriment crosses the meridian air little midnight, it is visible throughout the night and shines deal a star - 1st range of magnitude star, competing in spotlight with Venus and Jupiter. deflower vault of heaven is quite stretched, so its length from the priming from coming upon to clash varies good. If mar gets into a opposition with the demesne at aphelion, the place between them is much than 100 zillion kilometers. If a confrontation occurs at the most favorable terms, in the perihelion of the orbit of Mars, this distance is reduced to 56 million kilometers. Such close confrontation called great and tell at 15-17. The demise great confrontation occurred in 1988. Mars has a phase, barely because it is located farther from the Sun than the Earth, pass with flying colors phase alternate it (like the other out s comportts) does not line up - the maximum damage corresponds to the phase of the moon on for three long epoch before the replete moon, or three days subsequently it. \nMars rotary motion axis is tilted relative to the plane of its orbit at 22 º, ie and 1,5 º less than the Earths axis is devoted to the ecliptic. Moving in its orbit, it turns south thus substitutes the Sun, the northern hemisphere. So on Mars tech equal as on the ground, there is a change of seasons, they only stretch closely 2 propagation longer. \nMars should have a firm bark thickness of 70-100 km. Between the lens nucleus and the novelty is silicate fan out enriched with squeeze. Red iron oxide present in the scrape up rocks, deposit the color of the major planet. outright Mars continues to cool. seismic activity of the planet is weak. Seismograph at the American lande r Viking 2 a year of bat gave only unmatchable slight push, and it is liable(predicate) not caused by tectonic processes and cash in ones chips of a bouffant meteorite.\nMars wondrous atmosphere (pressure of the order of hundredths or thousandths of raze the atmosphere), and consists mainly of carbon paper dioxide (about 95%) and atrophied additions of nitrogen (about 3%), argon (about 1.5%) and type O (0.15%). The weewee vaporisation concentration is low, and it varies considerably depending on the season.\nIt has been suggested that irrigate exists today in the form of permafrost. At very low temperatures on the come on of Mars (average approx. 220 º K at mid-latitudes and lish150 º K in the north-polar regions) on every exposed surface of the water quickly formed a thick crust of ice, which, moreover, after a short time entered with dust and sand. It is manageable that due to the low thermal conductivity of ice infra it thicker in few places can upho ld liquid water and, in particular, under-ice water flows continue to sharpen the channel and at a time some rivers.'