Universe a grand tour of modern science Phần 2 pdf

... satellites.They have masses a few times greater than the Sun’s, and nowadays they arecalled microquasars. The black hole idea was thus available, ready made, forexplaining the quasars and active galaxies ... somewhat laborious. By 20 01, at Spain’s Instituto deAstrofisica de Canarias, Alister Graham and his colleagues realized that youcould judge the mass just by looking at a galaxy’s overall appearance.The ... land’s vegetation by unmanned spacecraftalready spanned two decades. Tucker collaborated with a team at BostonUniversity that quarried the vast amounts of data accumulated daily over thatperiod,...

Universe a grand tour of modern science Phần 1 pptx

... the stresses of spaceflight and the wrath of NASA to visit the Space Station in 20 02, as a paying guest of the Russians, heblazed a trail for ordinary mortals.One day the first babies will be ... TorontoWith offices inArgentina Austria Brazil Chile Czech Republic France GreeceGuatemala Hungary Italy Japan Poland Por tugal SingaporeSouth Korea Switzerland Thailand Turkey Ukraine VietnamOxford ... small step towards amassing antimatter for thepowering of a starship. When anti-atoms and normal atoms come together theyannihilate one another, with a huge release of energy, making antimatter...

Universe a grand tour of modern science Phần 3 docx

... those back together, abolishing theAtlantic Ocean, and the job is half-done.East of Africa it’s trickier, because Antarctica, India and Australia could fittogether in old Gondwana-Land in various ... called themthe Altaids, after the magnificent Altai mountain range that runs fromKazakhstan to China.‘The Tethysides and the Altaids cover nearly a half of the entire continent of Eurasia,’ ... In theAlps he saw the tr aces of a vanished ocean, which formerly separ ated Italy andthe Adriatic region from Switzerland and Austria.163The mathematics and abstract reasoning that emerged...

Universe a grand tour of modern science Phần 4 ppsx

... and improvements of seadefences against tsunamis—the great ‘tidal waves’ that often accompanyearthquakes.City by city, district by district, experts calculate the risks of damage andcasualties ... potential energy of a stream about to go over a waterfall. The energy associated with a certain speed or temperature was greaterin a large mass than in a small one, but only in the narrow sense that ... investigation team based at Strasbourg. ‘In a reactor located 25 0 metersdeep, there’s no evidence that radioactive contamination has spread more than a few metres, after 2 billion years. Even a reactor...

Universe a grand tour of modern science Phần 5 doc

... in our own backyard,at the oldest stars of the Milky Way Galaxy itself, and at nearby galaxies. Billions of years from now, the Magellanic Clouds and the Andromeda Galaxy may allcrash into us. ... arranged with Russian colleagues to have the basalt frommany of the West Siberian boreholes dated by argon-argon at a Scottish lab in EastKilbride. Again, it all came out at almost exactly 25 0 ... predominant inthe early era of life on Earth. As a greenhouse gas, resisting the escape of radiantheat into space, the methane may have helped to keep the planet warm when,as astronomers calculate,...

Universe a grand tour of modern science Phần 6 potx

... Berkeley announcedanother walker, around 5.5 million years old, found in Ethiopia. He called itArdipithecus ramidus kadabba, where kadabba meant ‘basal family ancestor’ in theAfar language of the ... widespread changes inthe Atlantic reaching to South America and West Africa, already correlated withsolar variations by other scientists. Farther afield, reductions of rainfall in EastAfrica coincided ... inappearance arises from a chemical imbalance in the repetitive DNA in regionswhere genes are scarce, which makes them better able to take up the stain andso appear dark.‘It appears that...

Universe a grand tour of modern science Phần 7 docx

... exclusivelyin Australia.Kangaroos, koalas and all of the typical native mammals of Australia aremarsupials. They give birth to very small offspring, which complete theirgestation in a body pouch ... one scenario rather than another was whatactually happened. Also lacking is clear knowledge about what the planet waslike at the time. It was certainly not a tranquil place.Big cr aters still ... great cycles of starbirth and planet-making, theeventual deaths of stars and planets, and rebirth from the debris. Water andother materials play a key physical role in star formation, by acting...

Universe a grand tour of modern science Phần 8 pot

... possibility of retreat as well as advance, remains a valid basis for thinking generally aboutco-evolution and its weaponr y. Hamilton’s idea of sex as a means of sharing out539plant diseasesPotatoes ... feature was the absence of jaguars, pumas, harpy eagles, anteating armadillos and other predators on all of the smallest islands, letting the seed-eating rodents, leaf-cutter ants andmonkeys run amok.Riveros ... large plates account for 94 per cent of the Earth’s surface. In descendingorder of size they are the Pacific, African, Eurasian, Indo-Australian, NorthAmerican, Antarctic and South American...

Universe a grand tour of modern science Phần 9 docx

... search for sparticles at Fermilab nearChicago, begun in 1996, concluded only that a gluino, if it exists at all, must beat least as heavy as an atom of lead. That was beyond the capacity of ... because of technical problems in 20 01.‘It was exciting to see the solar weather changing day by day,’ said Saku Tsuneta of the National Astronomical Observatory of Japan. ‘Storms on the Sun are ... thesurface. During a total eclipse it appears as the streaky corona that gives theatmosphere its technical name. Telescopes called coronagraphs use a centralmask to create an artificial eclipse at...

Universe a grand tour of modern science Phần 10 ppt

... 20 01National Academy of Sciences: Climate Change Science: An Analysis of Some Key Questions,Washington: National Academy of Sciences, 20 01Editors of Science: ‘Areas to Watch in 20 03’, Science, vol. 29 8, ... 160–3, 20 00Valtaoja: personal communication, 20 02 Brain imagesLandau: W.M. Landau et al., Transactions of the American Neurological Association, vol. 80,pp. 125 –9, 1955Scandinavian researchers: ... in a museum. There is a Dark Age of a billionyears, or perhaps much less than that, between the microwave background andthe appearance of the stars and galaxies. Very distant objects are also...

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