Women are more plans for Mars.

<P Align=center> </ P> <P align=center> women may be more appropriate to carry astronauts on Mars expeditions </ P> <P align=left> Recently, scientists have claimed that the United States, women on long space flight .ability to adapt better than men, so in the implementation of future Mars landing program, priority should be given to female astronauts. .</ P> <P align=left> 乌雅姆罗伊 Ohio College of Medicine professor pointed out that although the current implementation of space exploration missions are mostly young male astronauts, but in the long journey to Mars, they are suffering .risk of heart disease is significantly higher than females. .Professor Luo Yi believes that the implementation of Mars landing mission to be the best candidate for the astronauts who reached the age of 30-year-old woman. .This is mainly because the female hormones make young women of the cardiovascular system during long space flight to the performance more stable. .</ P> <P align=left> Mars taking into account the implementation of the activities of the astronauts are often in need of open space, when their heart rate would reach about 170 times per minute, so the strength of the cardiovascular system .selection of future Mars has become a decisive factor in players. .</ P> <P align=left> scientists also believe that all drugs in the therapeutic effect of weightlessness will be greatly reduced and the decomposition rate is also faster, so the astronauts can not improve the situation of hope in the heart of medicines. .In addition, the body digest, absorb the system's operational efficiency in space but also much lower than in the ground. .</ P> <P align=left> men with higher iron content in the body is the need to face another problem. .In the long-term space flight, the concentration of iron in the body may reach to the level of male astronauts poisoning. .</ P> <P align=left> the same time, researchers believe that women's lower body weight, long-distance flight in need of food is also less. .On a long space flight, the physiological activity of the waste generated in the process is a less important factor. .</ P> <P align=left> scientists found only in women, a taboo - menstruation. .Into open space, the period will increase women's risk of astronauts suffering from decompression sickness. .Reduction of the body will increase blood levels of the symptoms of decompression sickness. .</ P> <P align=left> Nevertheless, the physician who is recommended that the organizers of Mars exploration activities should be selected women 30 years old to reduce the astronauts during long space flight, the risk of illness. .</ P> </ p>.

Origin of Earth's neighbor, the mystery of the moon.

<P Align=center> </ P> <P> Moon is the Earth a rich mythology of the neighbors. .Although the United States in the 60s of this century, "Apollo" spacecraft on the moon, but the mystery about it is increasing, the biggest mystery is the origin of the moon. .</ P> <P> Usually, the origin of the moon there are several issues that must be considered. .Age: According to the study of isotopes of some elements, can confirm the age of the moon and Earth are similar, it is also about the formation of 4.6 billion years ago; quality issues: the quality of the moon about the Earth 1 / 81, the average density per cubic .3.34 g cm, roughly equivalent to the average density of the mantle, so the core of the moon can not be a big iron core; composition problem: the moon's chemical elements can all be found on Earth, but the aluminum contained in lunar rocks ., calcium and titanium and other chemical elements in rocks to be more than 6 times, while iron, sodium, magnesium rarely; orbit: more than nine planets satellite near the planet's equatorial plane to move, while the moon's orbit but with .Earth's equatorial plane is 120 degrees difference, but with close to the ecliptic plane. .</ P> <P> of these issues, As everyone mixed. .Thus the origin of the Moon is more difficult to get a satisfactory explanation. .At present, there are several claims: </ P> <P> First, the division said. .Only on grounds that the initial hump in the Earth's equator, the sun's gravity and Earth's rapid rotation under the action of the moon "fly" out, split into satellite. .But to reach the Earth's centrifugal force to throw the extent of the moon is impossible, but both have very different chemical composition. .</ P> <P> Second, the capture said. .The moon in the solar system that was originally the asteroid a general, in a chance in the near-Earth line when it was captured, and to become Earth's satellite. .But the orbit can not explain. .If the asteroid from the side after the ball, it only slightly to change its orbit, it is impossible to be captured over the Earth. .</ P> <P> Third, homologous said. .That both facilities from both a rapid transfer of the dust cloud generated action, but why do they have very different chemical composition of it? </ P> <P> above hypotheses have their own shortcomings, then, it was suggested that a .new hypothesis, that is violent asteroid hit the Earth, to take away a large material, and finally the formation of today's moon. .The impact to the Earth orbital plane tilted, and was hit out of the original material occupy the position of the Earth's equator. .Of course, this is just another hypothesis, there are many issues to be studied. .</ P> </ p>.

Strange companion star is covered by light.

<P Align=center> </ P> <P> Technology Channel (tech.) news: In most cases, astronomers have been asked to find a star, then is it possible to find planets around it. .Recently, two American scientists, however it is in the vicinity of a planet to the star of new observation. .</ P> <P> from the Space Telescope Science Institute in Baltimore astronomer Levy Rudd and David Bennett of Notre Dame, said, through the "Hubble" telescope compared to the analysis of the photos .Yes, they are already back in 2003 one was found near the planet has found a star. .</ P> <P> two scientists said that previously the planet through the "gravitational lens effect" was found. .Was found in his shortly after astronomers discovered the planet around the same time there are two stars, but because of the two near each other, so that their experts could not distinguish the light emitted. .This way, astronomers can not determine the new planet in the end in round one of which stars rotate. .</ P> <P> However, two American scientists in the analysis of a large number of optical filters through the photos taken after successfully separate the two stars. .For those on the ground observer, this angular distance between two stars is only about 0.7 milliseconds. .</ P> <P> According to reports, the previously discovered planets revolving around it in the "front" of the star,. .Now, the stars - planetary systems have been named as OGLE-2003-BLG-235L/MOA-2003-BLG-53L. .Scientists have now determined that the newly discovered star is a quality that only 60% of the sun brown dwarfs, and around it is a rotating mass of 2.6 times the gaseous planets of Jupiter. .</ P> </ p>.

Orion Nebula is giving birth to a large number of stars.

<P Align=center> </ P> <P> Technology Channel (tech.) message: the Canadian and French jointly built WIRCam first before shooting wide-angle infrared camera to the magnificent figure of the Orion Nebula. .</ P> <P> Orion Nebula, about 1,300 light years from Earth, which is constantly nurtured a large number of new stars. .According to experts on, the majority of stars in the Orion Nebula have formed 200-300 million years ago, that is, their actual age is less than one thousandth of the sun and the earth. .Many of the stars in the nebula is currently in the formative stage, they also wrapped around a very thick layer of dust clouds. .The difference is that with the visible light, infrared can penetrate the dust in the material universe, so since, astronomers using infrared observation device can understand the star formation process. .</ P> <P> photo accompanying this article, a large number of red light emitted by celestial bodies, the dust cloud has been severely weakened, in order to observe them can only be by means of infrared camera. .Observations show that in the central area of the Orion Nebula there is a long several root "fingers" of the red dot. .It is reported that the red dot which is a molecule composed primarily of hydrogen clouds, and in its interior is a high speed has been formed and is a star from the nebula center. .</ P> </ p>.

Why is the planet called "line" star?.

<P> Technology Channel (http://tech.) Message: Here I do not intend to and discussion of stars and planets were in the physical. .Would like to discuss with you is on the celestial sphere of stars and planetary motion characteristics. .</ P> <P align=center> </ P> <P> star of the "constant" stands for his position on the celestial sphere is constant, the article mentioned in the celestial sphere of stars in the sky in the direction of movement .not chaotic, but does not change the shape of the constellation. .Star from the east horizon to climb, to climb the highest point (transit), and then sank to the west. .Looks like the entire celestial sphere as rotating around the Earth. .(Note: In fact, the location of stars on the celestial sphere will change in fact, we call on the motion of stars in the celestial sphere as their own, but very, very slow moving star, insisted after several decades, coupled with accurate .The measure, to be able to detect it). .</ P> <P> planet "line" and not one word on their behalf never stop in the same constellation, which will be near the ecliptic on the celestial sphere around the battles, they are loitering around, because they, like the Earth .these will revolve around the sun. .</ P> <P align=center> </ P> <P> Here are some planets on the celestial sphere used to describe common terms to run: </ P> <P> "anterograde", "retrograde" and "stay ."</ P> <P> solar system planets revolve around the sun from west to east direction. .As a result of planetary orbital speed and its orbit different positions on the Earth Observing planets, the planets move in the direction of the Earth to the same direction (ie from west to east movement), then called "anterograde", opposite direction .called "retrograde", when converted into retrograde, anterograde or retrograde transfer into the smooth line, when the planet appears to be stationary is called "stay." .</ P> <P> Here are some of the planet and the Earth used to describe the transition in the public lane corresponding terms: </ P> <P> "integration" and "red" </ P> <P align=center> < ./ P> <P> Planet Earth at the transition of its public trail running, when the planets, the Earth and sun form a straight line called the "closing" or "red." .</ P> <P> to the inner planets (ie planets inside Earth's orbit, is the inner planets Mercury and Venus), the sun is between the planets and the Earth, called "SCO", the planets between the sun and the Earth .When called "inferior conjunction." .</ P> <P> to the outer planets (ie planets outside the Earth's orbit, Mars, Jupiter, Saturn, Uranus, Neptune and Pluto are the outer planets), the sun is between the planets and the Earth called the "joint" .the earth and the sun in the middle of planets called "red", this time from the nearest planets and the Earth is the best time observations. .</ P> <P> "Big Sandy": </ P> <P> the inner planets (ie Mercury and Venus) orbit the Earth within the orbit. .It seems from the earth, they and the sun is always inseparable from the sun, sun go west of the east, then back east. .Because they are very close to the sun, so we only before sunrise or late afternoon to see them. .When the inner planets, Earth and the sun angle formed by three stars from the maximum called the "Big Sandy", can be observed the longest. .</ P> <P> the east of the planet to the sun "of Tokyo from" behind the planets will appear on the western horizon in line, and this was the best time for observing the planet. .</ P> <P> "West Big Sandy" that said the west side of the planet to the sun. .Planet from the east before sunrise on the horizon rise because of the need observation before sunrise, so the conditions of observation is less than the "East Big Sandy." .</ P> <P> there, Venus appeared before sunrise, we called the morning star, the sun will be called the evening star appears before. .</ P> <P> "transit" </ P> <P> "transit" is the Sky in the "food" a, the principle is similar with the solar eclipse is from the inner planets, the day passed, .We see a black spot in the plane slowly passing day, such as the transit of Mercury and the transit of Venus. .</ P> <P> Mercury's orbit and the ecliptic plane angle between the VII, May and November each year Mercury orbit the Earth through the intersection and down near the intersection, if the Mercury at inferior conjunction is just to .transit of Mercury occurs in the phenomenon. .Far away from Mercury and the Sun, Mercury, the sun's diameter is only about 1 / 285, so we used binoculars to projection observed transit of Mercury can only see a small black spot slowly swept from the surface of the sun .before. .</ P> <P> transit of Mercury </ P> <P> the transit of Venus since the phenomenon longer period of revolution and other factors it is relatively rare, occurring once separated by about 105 years, then every 8 years and again, and then to wait .121.5 years to see once and then for eight years and happened again. .The last transit of Venus in 1874 and 1882, the next will be June 8, 2004 and June 6, 2012 occurred. .</ P> <P align=center> </ P> </ p>.

Mars to be off seven break.

<P> Technology Channel (http://tech./) Message: Potapov Russian expert, wrote recently, astronauts from Mars and Earth if you want to be successful in the psychological and physiological aspects of relations over seven. .</ P> <P> is planning a manned Mars landing in a complex and unique experience will enable astronauts to the test. .Subject of the Russian specialists of the Institute of Medical Biology, recently Potapov Russian "scientific information", wrote the journal, the astronauts from Mars and Earth if you want to be successful in the psychological and physiological aspects of relations over seven. .</ P> <P> Potapov that the Star Trek crew to and from Mars and the Earth will be about a year and a half face high vacuum, high-speed stream of charged particles the universe, weightlessness and gravity of Mars and other factors. .Therefore, the astronauts should fully understand the need to break through the psychological and physiological clearance. .</ P> <P> experts believe that the first hurdle is to "adapt to the new environment" off. .Investigation on the road when Mars, the astronauts to be used in a half months of weightlessness, cosmic radiation increases, the ground magnetic field disappears, the cabin space is small and other environmental and complete the task. .</ P> <P> second hurdle as "ring into the orbit of Mars" off. .After a long flight is about to enter the ring before the orbit of Mars, astronauts will become increasingly tense psychological. .Therefore, experts suggest that the work will reduce the intensity, accompanied by a doctor on the crew strengthen psychological counseling, related training but also to keep up. .For example, the full centrifuge training helps astronauts adapt to Mars after Mars gravity. .</ P> <P> the third and fourth off the "Mars Landing" and "stay" off. .Astronauts landing on Mars and a series of problems encountered during their stay, such as long-term weight loss of Mars gravity may make the body a certain disorder and its adaptability; Martian magnetic field weak, thin atmosphere, like Earth that can not resist the invasion of cosmic rays; spacecraft .microorganisms within the Earth may be "boarded" on Mars, causing pollution. .Therefore, the astronauts are required to schedule in time to solve these problems, and ensure the smooth progress of inspection work. .</ P> <P> fifth, sixth off as "fatigue" and "return to" off. .Inspection tasks to complete the surface of Mars astronauts will have a strong feeling of fatigue, when needed related drugs, equipment and psychological counseling to help them recover. .In the voyage back to Earth before the end of 2 to 4 weeks, the astronauts will be excited, these feelings will be transformed into anxiety, then need to take the necessary precautions. .</ P> <P> last pass as a "ground-recovery" off. .After the astronauts return home to be in the "big difference" in environments with restorative treatment, and may receive long-term psychological counseling. .</ P> <P> experts pointed out that near-earth orbit space station's long-term experiments have enabled researchers in response to the first, sixth and seventh off the test has accumulated rich experience, but how to break through many of the details of other relevant .problem, researchers continue to explore. .</ P> </ p>.

Bomb? .All Secret Tunguska.

<P Align=center> </ P> <P align=left> Technology Channel (tech.) Message: June 30, 1908, in the Russian Empire, Siberia, Tunguska River Forest, suddenly burst into a loud noise, a huge mushroom cloud .the sky, the sky appeared a strong white light, the temperature transient hot roast people, the central area of vegetation burnt explosion, seventy kilometers away, and being severely burned, there were huge sound deafened the ears. .Not only terrified nearby residents, but also to the other countries. .Many of London lights suddenly go out, darkness; people in many European countries saw the daylight in the night sky like a flash; even as far as the American side of the ocean, people have felt the earth shake ... ... </ P> <P .align = left> a specific time of occurrence of the morning 7:17 pm, location 60.55 degrees north latitude, 101.57 degrees east longitude, near the near the Tunguska River (now the Russian Federation, Avon-based autonomous regions). .Its destructive power was estimated to be worth 10 to 15 one million tons TNT, and let more than 2150 square km falls within the 6 million trees. .</ P> <P align=left> </ p>.

Cosmos.

<P> Technology Channel (tech.) message: the myth of origin of the universe, "the universe egg" is a common hypothesis. .The hypothesis that the universe is compared to a living body, and even includes people are "small universe", the universe is the "adult" thinking. .Sexual dimorphism of the eggs came from the "cosmic egg" have "very yin and yang" (contradictory) was born. .If this similar to the "Big Bang hypothesis," the myth is correct, the life of the fertilized egg contains the genetic information of living things grow, then the "cosmic egg" also contains information on the evolution of the universe. .But the problem is the survival of life on the outside activities of the material by the lessons, "the universe egg" is the evolution of the universe itself will contain all the material is also on "nothingness" (such as anti-matter is material added to "0" or the material for the positive .Add as a negative force to "0") continue to provide it? .</ P> <P> expansion of the universe similar to the life of the body's growth, aging makes the body back to life "shrink", scientists have to a certain degree of expansion of the universe will contract until it returns the initial state. .If the "cosmic egg" evolution of the universe itself will contain all the material, then most of its development there is a limit, a greater chance of contraction of the universe. .Of course, the new universe may be born again. .If the "cosmic egg" depend on "nothingness" to continue to provide its situation is different since, unlike real life, depend on some substance to the body to sustain life, maintained by the energy of the infinite nothingness of the universe may be eternal life without reincarnation. ."Cosmic egg" of the DNA double helix is a physical, one is philosophical, the mystery of things in here. .Mystical practice of "no" as the core, which originated from the universe of "nothingness" to rely on, almost exactly the same way is the pursuit of eternity. .</ P> </ p>.

Gray clouds over Mars.

<P Align=center> </ P> <P align=left> Technology Channel (tech.) message: "Mars Express" was taken to the gray clouds above Mars, the European Space Agency's "Mars Express" spacecraft recently .found over large areas of Mars, the gray clouds, although from the appearance point of view, they are gray with the clouds in the Earth's atmosphere are very similar, but research shows that the gray clouds on Mars, the airspace in which the higher and the ingredients are completely different. .</ P> <P align=left> scientists said, the gray clouds on Mars, about 80-100 km height from the ground (similar to Earth in cloud height between 50-90 km.) .Prior to that, they never like on other planets discovered cloud height. .</ P> <P align=left> However, the density of Mars is very thin clouds, the experts explained that if people want to see the gray clouds on Mars, then he must wait for the evening sunset - only .At the moment, they will be the phenomenon in the sunlight out of stature. .</ P> <P align=left> However, the Earth's middle atmosphere mainly composed of water ice clouds form, and the gray clouds in the Martian atmosphere is mainly composed of carbon dioxide crystals. .Of course, this situation does not allow the experts by surprise - the temperature of the upper atmosphere of Mars is only minus 193 degrees Celsius. .</ P> <P align=left> observations show that the gray clouds on Mars, carbon dioxide gas in the center of the crystal is only 100 nanometers in diameter dust. .</ P> <P align=left> ESA experts is through "Mars Express" was installed on the SPICAM ultraviolet and infrared spectrometer found that the cloud. .</ P> <P align=left> Before that, scientists think that the height of the clouds on Mars are very low, and some are even approaching the surface of Mars. .</ P> </ p>.

Tour the solar system eight planets.

<P> Technology Channel (tech.) Message: </ P> <P> Mercury </ P> <P> closest to the sun is Mercury. .Mercury is the planet of the solar system's fastest sport. .Mercury is no water, no air, and the hottest up to 427 degrees Celsius, the coldest at minus 173 degrees. .</ P> <P> Venus </ P> <P> size and Earth-like Venus, has a strong atmosphere. .However, up to 460 degrees surface temperature, atmospheric pressure 90 times Earth's. .Venus and Mercury are the barren and desolate world. .</ P> <P> Earth </ P> <P> Earth is a beautiful blue planet in the solar system "paradise world." .78% of the Earth's atmosphere is nitrogen, 21% oxygen, the remaining 1% were other ingredients. .</ P> <P> Mars </ P> <P> Mars and Earth as there are high plains, but also across the ocean and rivers, now dry bed of leaves. .Scientists hope to find life on Mars traces of the surface. .</ P> <P> Jupiter </ P> <P> Jupiter is the solar system, "nine planets" in the largest planet. .Has a strong atmosphere, hydrogen, helium-based. .Jupiter's poles, found very similar with the aurora on Earth. .</ P> <P> Saturn </ P> <P> Saturn is the planet of the solar system's most beautiful, the surface light yellow, has a beautiful aura. .Saturn's size and quality second only to Jupiter, the largest number of satellites in the solar system planets. .</ P> <P> Uranus </ P> <P> 1781 Uranus was discovered by British astronomer Herschel. .83% of the atmosphere of Uranus is hydrogen and 15% helium and 2% methane and small amounts of acetylene and hydrocarbons. .</ P> <P> Neptune </ P> <P> 1845 year and 1846, two young people in Britain and France, respectively, Adams and Urbain Le Verrier independently calculated by a gravitational influence on another planet, Uranus, Neptune, which is .. .</ P> </ p>.

September Beijing will be reduced by 75 minutes of the day.

Technology Channel (tech.) Message: enter September, the weather getting cooler, it is catch-phrase is: The days are getting shorter, but how short how much? .Astronomers have been extrapolated into September, the day in Northeast China by short 2.8 minutes per day, north and northwest regional average of 2.3 minutes, and Central and East average of 1.8 minutes on average in South China .1.3 minutes. .Why do days get shorter? .Tianjin and Jiangsu, two of astronomy experts explained that every year in September, reduce the speed of the day the most obvious. .Tilt of the Earth's rotation, and revolution around the sun to do exercise, since from the summer solstice, the sun's direct point on the Earth daily southward; to the autumnal equinox day, the direct equator; after the autumnal equinox point to the direct sun south of the equator, so that distribution to the northern hemisphere .reduction of sunlight daily, so the Northern Hemisphere time of day shortened day by day. .Shorter days and longer this change, the more obvious areas of higher latitudes. .To this end, astronomy experts selected the city for a few representative calculations: September, 92 minutes less daylight in Harbin, Shenyang, 80 minutes, 75 minutes for the Beijing and Shanghai is 54 minutes, and Xiamen for 40 minutes. .</ P>.