Back to the main page

Archives Of Science Blog

Subscribe To Science Blog RSS Feed  RSS content feed What is RSS feed?


May 14, 2006, 11:25 AM CT

Trail of Comet Crumbs

Trail of Comet Crumbs

NASA's Spitzer Space Telescope has snapped a picture of the bits and pieces making up Comet 73P/Schwassman-Wachmann 3, which is continuing to break apart on its periodic journey around the sun. The new infrared view shows several chunks of the comet riding along its own dusty trail of crumbs.

"Spitzer has revealed a trail of meteor-sized debris filling the comet's orbit," said Dr. William T. Reach of NASA's Spitzer Science Center at the California Institute of Technology, Pasadena. Reach and his team recently observed the comet using Spitzer.

Comet 73P/Schwassman-Wachmann 3 consists of a collection of fragments that file along like ducks in a row around the sun every 5.4 years. This year, the bunch will pass by Earth beginning on May 12 before swinging by the sun on June 6. The fragments won't get too close to Earth, about 7.3 million miles, or 30 times the distance between Earth and the moon, but they should be visible through binoculars in the countryside night skies.

The icy comet began falling apart in 1995 during one of its tropical trips to the sun. Astronomers believe that its crusty outer layer cracked due to the heat, allowing fresh ice to evaporate and split the comet apart.

During the past six weeks, amateur and professional astronomers have been watching the comet fall apart before their telescopes' eyes. Spitzer viewed the broken comet from its quiet perch up in space May 4 to May 6, covering a portion of the sky that allowed it to spot 45 of the 58 known fragments.........

Posted by: Edwin      Permalink         Source


May 14, 2006, 11:16 AM CT

Fast Winds from Dying Stars

Fast Winds from Dying Stars
Credit: Credit: X-ray: NASA/CXC/RIT/J.Kastner et al.; Optical/IR: BD +30 & Hen 3: NASA/STScI/Univ. MD/J.P.Harrington; NGC 7027: NASA/STScI/Caltech/J.Westphal & W.Latter; Mz 3: NASA/STScI/Univ. Washington/B.Balick
This panel of composite images shows part of the unfolding drama of the last stages of the evolution of sun-like stars. Dynamic elongated clouds envelop bubbles of multimillion degree gas produced by high-velocity winds from dying stars. In these images, Chandra's X-ray data are shown in blue, while green and red are optical and infrared data from Hubble.

Planetary nebulas - so called because some of them resemble a planet when viewed through a small telescope - are produced in the late stages of a sun-like star's life. After several billion years of stable existence (the sun is 4.5 billion years old and will not enter this phase for about 5 billion more years) a normal star will expand enormously to become a bloated red giant. Over a period of a few hundred thousand years, much of the star's mass is expelled at a relatively slow speed of about 50,000 miles per hour.

This mass loss creates a more or less spherical cloud around the star and eventually uncovers the star's blazing hot core. Intense ultraviolet radiation from the core heats the circumstellar gas to ten thousand degrees, and the velocity of the gas flowing away from the star jumps to about a million miles per hour.

This high speed wind appears to be concentrated into opposing supersonic funnels, and produces the elongated shapes in the early development of planetary nebulas (BD+30-3639 appears spherical, but other observations indicate that it is viewed along the pole.) Shock waves generated by the collision of the high-speed gas with the surrounding cloud create the hot bubbles observed by Chandra. The origin of the funnel-shaped winds is not understood. It may be correlation to strong, twisted magnetic fields near the hot stellar core.........

Posted by: Edwin      Permalink         Source


May 14, 2006, 10:45 AM CT

Forget Blockbuster and Netflix

Forget Blockbuster and Netflix
Have movies delivered directly to your TV. All you need is the $199 setbox by Moviebeam, which comes loaded with 100 movies in HDTV or DVD quality with Dolby 5.1 surround sound, perfect for your home theatre setup. After that you can get up to 10 movies a week at prices ranging from $1.99 to $3.99 per movie.

Moviebeam totes the product as "brilliant new way to rent and watch movies at home. Get movies delivered directly to your TV - no cable, satellite, or computer is required".

This should have you wondering by now, how the movies are actually delivered to your Moviebeam box. The company has patented a digital wireless service that "beams" the movies into your home.

There are no subscription fees, no late fees, nothing to return ever!!! The only downside, you have 24 hours to watch each movie you rent, but you can watch it as many times as you want to during the rental period, and Moviebeam while avalable throughout the US is not yet available in all areas. Check availability for your area before you run out to get a set @ Moviebeam.

Blockbuster & Netflix watch out!!!........

Posted by: John      Permalink         Source


May 14, 2006, 9:36 AM CT

World's Thinnest Samsung SGH-X820 Mobile Phone

World's Thinnest Samsung SGH-X820 Mobile Phone
It's simply aesthetic, just can't wait anymore to grab this world's thinnest cell phone, isn't it? You can feed on more detailed pictures of the 6.9mm Samsung SGH-X820 cell phone, rolled out at the Expo Comm Korea 2006, at AVing.

Each and every cell of this skinny beast is carved for the kill. The skinny Samsung SGH-X820 lures with its 2 inch TFT screen, a 2MP camera and a TV-Out port. Weighing just 66g the 113×50x6.9mm GSM/GPRS/EDGE phone will, most probably, hit Europe in June.........

Posted by: John      Permalink         Source


May 14, 2006, 9:33 AM CT

Cars That Anticipate Crash

Cars That Anticipate Crash
Cameras and radar work together, pinpointing the position and velocity of potential impactors (Image: Siemens)
What if the car you're pumping to the limits changes its shape before a collision? Nothing can be better then this; and no, we're not building castles in the sky, rather German scientists have already hit the accelerator with their latest innovative technology that anticipates any collision and allows the car to change its shape.

Equipped with cameras and radar, the car senses the impact and changes its shape with the help of shape-shifting metal in the door. Designed to absorb mainly the side impacts, which too sometimes are fatal, the material in fact distributes the force at the right time with the help of the so-called the impact-sensing system.........

Posted by: John      Permalink         Source


May 14, 2006, 9:20 AM CT

Magnetic Message Board With Movement Sensor

Magnetic Message Board With Movement Sensor
Leaving messages on the fridge to make sure your partner or roommate doesn't forget to put the food-stuff inside will never go unnoticed with Lumipad. The battery-powered magnetic message board has a movement sensor in it, so when you walk past it, it flashes at you. Lumipad comes with a special pen and it sells for $79.95. Paper messages are passe, Lumipad is the geeky way to ensure your small note doesn't end-up unnoticed!!.

Cool Factor: Cool Concept.........

Posted by: John      Permalink         Source


May 14, 2006, 1:20 AM CT

Connectable Multimedia To The TV

Connectable Multimedia To The TV
Eventhough it is simple to mount a computer near the television set to be able to reproduce films or to listen to music, everybody does not have the time or the desire to do it. In that case, Mvix the Player Multimedia can be a good option.

This will allow you to reproduce video, audio and to see photographs, besides its ability to transmit the audio by means of an emitter FM, by which we could listen to it in our radio. It has outlets for Super Video and composite video, a remote port USB and remote control.

Its price is of 249 dollars, eventhough strangely it does not include hard disk, which we will have to add.........

Posted by: John      Permalink         Source


May 11, 2006, 11:43 PM CT

Light's Most Exotic Trick Yet

Light's Most Exotic Trick Yet Robert Boyd, professor of optics (PHOTO CREDIT: University of Rochester)
In the past few years, researchers have found ways to make light go both faster and slower than its usual speed limit, but now scientists at the University of Rochester have published a paper today in Science on how they've gone one step further: pushing light into reverse. As if to defy common sense, the backward-moving pulse of light travels faster than light.

Confused? You're not alone.

"I've had some of the world's experts scratching their heads over this one," says Robert Boyd, the M. Parker Givens Professor of Optics at the University of Rochester. "Theory predicted that we could send light backwards, but nobody knew if the theory would hold up or even if it could be observed in laboratory conditions".

Boyd recently showed how he can slow down a pulse of light to slower than an airplane, or speed it up faster than its breakneck pace, using exotic techniques and materials. But he's now taken what was once just a mathematical oddity-negative speed-and shown it working in the real world.

"It's weird stuff," says Boyd. "We sent a pulse through an optical fiber, and before its peak even entered the fiber, it was exiting the other end. Through experiments we were able to see that the pulse inside the fiber was actually moving backward, linking the input and output pulses".........

Posted by: John      Permalink         Source


May 11, 2006, 11:33 PM CT

Rising Price Of Oil Highlights Affordable Energy Alternatives

Rising Price Of Oil Highlights Affordable Energy Alternatives

With oil prices reaching near near-record highs in recent weeks, calls have grown louder for the U.S. to develop new sources of affordable, domestic energy. Work by experts from The Earth Institute at Columbia University suggests that relatively low-cost alternatives already exist to meet the country's' growing energy demand that would at the same time reduce the need to rely on oil supplies from the Middle East and Latin America.

A report published by Klaus S. Lackner and Jeffrey D. Sachs of The Earth Institute at Columbia University that appears in the most recent issue of Brookings Papers on Economic Activity states that coal alone could satisfy the country's energy needs of the twenty-first century. In particular, coal liquefaction, or the process of deriving liquid fuels from coal, is already being used in places and with expanded infrastructure could provide gasoline, diesel fuel and jet fuel at levels well below current prices. Moreover, they argue that environmental constraints such as increased carbon dioxide emissions arising from greater use of coal and other fossil fuels could be avoided for less than 1 percent of gross world product by 2050.

"[With widespread use of coal liquefaction] the long-term price of liquid hydrocarbon fuels may be lower than it is today, even allowing for pessimistic forecasts for oil and gas reserves," the authors write. "Even with the most conservative assumptions about learning curves, it appears quite safe to predict that the cost of synthetic oil from coal or other processes, after some transitional pains, will be below $30 per barrel." Sachs and Lackner also point out that the large deposits of coal in the U.S. and worldwide make it less prone to the political uncertainties that currently afflict world oil prices.........

Posted by: John      Permalink         Source


May 10, 2006, 11:22 PM CT

10 Million-Unit Head Start for Xbox 360

10 Million-Unit Head Start for Xbox 360
Microsoft Corp. Chairman and Chief Software Architect Bill Gates today staked the claim that the Xbox 360- system will have a 10 million-unit head start by the time the competition enters the market and more than 160 games by the end of the year. Gates went on to outline the company's bold new vision to connect millions of Xbox 360 gamers with hundreds of millions of Microsoft® Windows®-based PC and mobile gamers from around the world through the Xbox Live® online entertainment network. Gates made the announcements at a press conference to open the Electronic Entertainment Expo (E3), the largest annual confab for the interactive entertainment industry.

Dubbed "Live Anywhere," the initiative puts gamers at the center of a ubiquitous always-on world where their digital identities, games, friends and digital entertainment are always accessible through the familiar Xbox Live interface, regardless of location or device. The plan also clears the way for groundbreaking cross-platform gameplay scenarios, with participants using Windows-based PCs, mobile phones and Xbox 360 consoles to play together simultaneously.

By this time next year, Microsoft expects more than 6 million gamers to be connected to the Xbox Live network. In addition, more than 25 million casual gamers are currently playing games on MSN® Messenger and MSN Games. Envisioning a forward look to more closely align these powerful communities, Gates outlined next steps to bring the Live Anywhere vision to fruition:........

Posted by: John      Permalink         Source


Older Blog Entries   1   2   3   4   5   6   7   8   9   10   11   12   13   14   15   16   17   18   19   20   21   22   23