WIADOMOîCI Z NASA |
SCIENCE@NASA E-MAIL SUBSCRIPTION SERCVICEWiadomo£ci zawarte s╣ tu z miesiΩcznym op≤ƒnieniem!!!NASA Science News for August 14, 2000 An interplanetary shock wave from the Sun struck Earth's magnetosphere just before the peak of the Perseid meteor shower on August 12, 2000, triggering a powerful geomagnetic storm. Stargazers across Canada and the United States were treated to the rare spectacle of a meteor shower seen against the backdrop of colorful Northern Lights. NASA Science News for August 16, 2000 Southern Africa offers a unique climate sub-system where scientists can study the effects of industrial activity, biomass burning and changing patterns of land usage on the environment. Last weekend an international team of scientists launched an intensive campaign -- part of the SAFARI 2000 project -- to study this complex region from the ground, the air and from space. NASA Science News for August 17, 2000 NASA's Deep Space 1 probe, en route for an encounter with Comet Borrelly, has run its unique propulsion system for more than 200 days -- longer and more efficiently than anything ever launched. The almost imperceptible thrust from the system is equivalent to the pressure exerted by a sheet of paper held in the palm of your hand. The ion engine is very slow to pick up speed, but over the long haul it can deliver 10 times as much thrust per pound of fuel as more traditional rockets. NASA Science News for August 21, 2000 Ham radio operators are notorious for their love of long-distance radio chats. Now, thanks to NASA's SAREX program, hams and students on Earth can enjoy the ultimate long-distance radio experience by contacting astronauts in orbit. NASA Science News for August 22, 2000 An orbiting radar has cut through clouds and dark of night to monitor the ebb and flow of Arctic ice. Scientists say the data could reveal important trends in global climate change. NOTE: Beginning Aug. 23, 2000, we will regularly offer audio versions of Science@NASA stories. Simply click on the speaker graphic at the beginning of today's headline to hear "Hot X-rays from a Cold Comet" read by the author. NASA Science News for August 23, 2000 Normally, x-ray astronomers concern themselves with the most violent and fiery denizens of the Universe. Colliding galaxies, supernova explosions and black holes are common targets for x-ray telescopes like NASA's powerful Chandra X-ray Observatory. But, last month researchers solved a cosmic mystery when they turned Chandra toward Comet LINEAR, a chilly snowball from the outer solar system. NASA Science News for August 24, 2000 Astronomers using NASA's Hubble Space Telescope have taken attendance in a class of brown dwarfs and found indications that these odd and elusive objects also tend to be loners. The Hubble census -- the most complete to date -- provides new and compelling evidence that stars and planets form in different ways. NASA Science News for August 25, 2000 Pilot studies indicate that microbial antibiotic production can be increased by up to 200 percent in space-grown cultures. Scientists who studied such antibiotics during the "John Glenn" shuttle mission in 1998 are looking forward to more low-gravity experiments on the International Space Station. NASA Science News for August 28, 2000 Fluctuations in the magnetic field surrounding Jupiter's moon Europa are a telltale sign of salty liquid water beneath the moon's icy crust. Europa could harbor the solar system's largest ocean. NASA Science News for August 28, 2000 Less than seven months after the Solar and Heliospheric Observatory registered its 100th comet discovery, amateur astronomers help SOHO double its record-setting total. Scientists think that most of SOHO's comets are fragments from the breakup of a single giant comet long ago. NASA Science News for August 29, 2000 For many years, researchers agreed that climate change was triggered by "greenhouse gases," with carbon dioxide from burning of fossil playing the biggest role. However, NASA funded scientists suggest that climate change in recent decades has been mainly caused by air pollution containing non-carbon dioxide greenhouse gases. NASA Science News for August 31, 2000 Two NASA scientists are working with the police and the FBI to track down criminals using out-of-this-world video technology. The new technique, called VISAR, is also expected to improve military reconnaissance, medical research and video on home computers. This story includes pictures and video of VISAR in action. NASA Science News for September 01, 2000 This morning a half-kilometer wide space rock is zooming past Earth barely 12 times farther from our planet than the Moon. In cosmic terms, it's a near miss, but there is absolutely no danger of a collision. Instead, the encounter offers astronomers an unusually good opportunity to study a near-Earth asteroid. NASA Science News for September 05, 2000 NASA scientists say that Solar Maximum is now in full swing. Does that mean you're more likely to catch a sunburn at the beach? The answer is "no," and this story explains why. NASA Science News for September 07, 2000 Science-fiction writer Arthur C. Clarke was once asked when the "space elevator," a notion he helped to popularize, would become a reality. Clarke answered, "Probably about 50 years after everybody quits laughing." Nowadays NASA scientists are taking the idea seriously. In fact, they've compiled plans that could turn the space elevators of science fiction into a real-life mass transportation system to space by the end of the 21st century. NASA Science News for September 08, 2000 Antarctica's ozone hole now covers an area three times larger than the entire land mass of the United States - the largest such ozone-depleted region ever observed. NASA Science News for September 11, 2000 Two NASA satellites can see things beneath the cloud tops of hurricanes that have been hidden from traditional weather satellites. The new data are helping scientists understand and predict dangerous storms. NASA Science News for September 11, 2000 The Harvest Moon, arguably the most famous Full Moon of the year, arrives on Wednesday, Sept. 13th. Check out this story to discover what makes the Harvest Moon special and to ponder the possibility of Harvest Moons on another planet. NASA Science News for September 13, 2000 The sunspot number has been remarkably low this week, but that didn't stop the Sun from unleashing an unusual type of solar flare yesterday. As a result of the explosion, a coronal mass ejection is heading toward our planet. It could trigger an auroral display when it hits Earth's magnetosphere around Sept. 14. NASA Science News for September 15, 2000 La Ni±a has faded away, but will weather patterns change? Some scientists expect the Pacific Decadal Oscillation to pick up where La Ni±a left off. NASA Science News for September 20, 2000 September has been a good month for astronomers studying Near-Earth asteroids (NEAs). No fewer than five sizable minor planets have flown past our planet since the beginning of the month, affording astronomers a close-up look at these ever-scary space rocks. NASA Science News for September 22, 2000 Today Earth joins two other worlds in the solar system where it is northern autumn. Read this story to learn more about Earth's September equinox and to ponder the bizarre seasons of other planets. NASA Science News for September 26, 2000 NASA's NEAR Shoemaker spacecraft has spotted square-shaped craters on asteroid Eros, a telltale sign of mysterious goings-on in the asteroid belt long ago. NASA Science News for September 28, 2000 This week's new Moon sets the stage for a "sporadic" meteor show featuring a cast of eye-catching stars and planets. NASA Science News for October 02, 2000 Concentrations of ozone-destroying gases are down, but the Antarctic ozone hole is bigger than ever. It turns out there's more to ozone destruction than just CFCs. NASA Science News for October 04, 2000 NASA-funded scientists are experimenting with miniature magnetospheres as an innovative means of space transportation. If the group succeeds, next-generation spacecraft may come equipped with fuel-efficient magnetic bubbles that speed their occupants from planet to planet and ward off the worst solar flares. NASA Science News for October 06, 2000 Creeping more slowly than a human fingernail grows, Earth's massive continents are nonetheless on the move. Geologists say that in 250 million years the Atlantic Ocean could be just a distant memory while Earthlings will be able to walk from North America to Africa. NASA Science News for October 10, 2000 Our planet is heading for a minefield of cosmic dust streams laid down by periodic comet Tempel-Tuttle. The result could be a series of meteor outbursts on Nov. 17 and 18, 2000. NASA Science News for October 12, 2000 The science payload for NASA's Genesis spacecraft, which will collect samples of the solar wind and return them to Earth, is now complete. NASA Science News for October 16, 2000 With the successful launch of NASA's HETE-2 satellite, amateur astronomers will soon be able to spot the most powerful explosions in the Universe from the comfort of their own back yards. Professionals are also looking forward to the new data, which they hope will unravel the mysteries of gamma-ray bursts. NASA Science News for October 18, 2000 On Friday the 13th of October a brilliant fireball startled stargazers in Texas and Kansas. But that was just a piece of space junk -- a real meteor shower arrives this weekend.
|