![]() | |||
| |||
|
|||
Recent Articles
|
Topic: Radio WavesWritten by Elizabeth Landau / Jia-Rui Cook
Their story has not only impacted generations of current and future scientists and engineers, but also Earth’s culture, including film, art and music. Each spacecraft carries a Golden Record of Earth sounds, pictures and messages. Since the spacecraft could last billions of years, these circular time capsules could one day be the only traces of human civilization. ![]() An artist concept depicting one of the twin Voyager spacecraft. Humanity’s farthest and longest-lived spacecraft are celebrating 40 years in August and September 2017. (NASA/JPL-Caltech) «Read the rest of this article» Sections: Technology | No Comments
NASA Laser Communications research may lead to faster data transfer in SpaceWritten by Andrew Good
The vast distances involved will throttle data rates to a trickle. You’re lucky if a spacecraft can send more than a few megabits per second (Mbps). But we might be on the cusp of a change. Just as going from dial-up to broadband revolutionized the Internet and made high-resolution photos and streaming video a given, NASA may be ready to undergo a similar “broadband” moment in coming years. ![]() Several upcoming NASA missions will use lasers to increase data transmission from space. (NASA’s Goddard Space Flight Center/Amber Jacobson, producer) «Read the rest of this article» Sections: Technology | No Comments
NASA uses Cubesats to advance Radio ScienceWritten by DC Agle
Courtney Duncan, an engineer at NASA’s Jet Propulsion Laboratory in Pasadena, California, says studying radio waves coming from a known source in space can reveal a great deal about objects in our solar system. Of course, there is nothing new in that. NASA scientists have been turning the transmissions of their spacecraft’s radio into scientific gold since almost the beginning of the space age. And ground-based astronomers have not been left outside of the radio spectrum looking in. ![]() The Low Mass Radio Science Transponder-Satellite (LMRST-Sat) is about 4 by 4 by 12 inches (10 by 10 by 30 centimeters) in size and weighs as much as a kid’s bowling ball (8 pounds or, 4 kilograms). The CubeSat is a collaboration between NASA’s Jet Propulsion Laboratory in Pasadena, California, and Stanford University’s Space and Systems Development Laboratory, Stanford, California. (NASA/JPL-Caltech) «Read the rest of this article» Sections: Technology | No Comments
NASA Scientists work to detect Gravitational Waves created by merging Black HolesWritten by Whitney Clavin
Scientists know these waves, predicted by Albert Einstein’s theory of relativity, exist but have yet to directly detect one. In the race to catch the waves, one strategy — called pulsar-timing arrays — has reached a milestone not through detecting any gravitational waves, but in revealing new information about the frequency and strength of black hole mergers. ![]() Merging black holes ripple space and time in this artist’s concept. Pulsar-timing arrays — networks of the pulsing cores of dead stars — are one strategy for detecting these ripples, or gravitational waves, thought to be generated when two supermassive black holes merge into one. (Swinburne Astronomy Productions) «Read the rest of this article» Sections: Technology | No Comments
American Heart Association reports Radio waves to kidneys lower persistent high blood pressureA minimally invasive procedure lowered blood pressure in patients whose condition failed to respond to medication.
The findings could have significant public health implications in the treatment of resistant hypertension, a major risk factor for heart attack and stroke, said Murray Esler, M.B.B.S., Ph.D., Professor and Senior Director of the Baker IDI Heart and Diabetes Institute in Melbourne, Australia. «Read the rest of this article» Sections: News | No Comments
Herschel Space Observatory looks into the Dark Heart of a Cosmic CollisionWritten by Whitney Clavin
The infrared light was captured by the European Space Agency’s Herschel Space Observatory, a mission with important NASA contributions. The X-ray observations were made by the European Space Agency’s XMM-Newton space telescope. ![]() The peculiar galaxy Centaurus A as seen in longer infrared wavelengths and X-rays. Inner structural features seen in this image are helping scientists to understand the mechanisms and interactions within the galaxy, as are the jets seen extending over thousands of light years from the black hole believed to be at its heart. (Credits: Far-infrared: ESA/Herschel/PACS/SPIRE/C.D. Wilson, MacMaster University, Canada; X-ray: ESA/XMM-Newton/EPIC) «Read the rest of this article» Sections: Technology | No Comments
NASA’s Fermi Gamma-ray Space Telescope is finding Mysterious Objects at the Edge of the Electromagnetic SpectrumWritten by Dauna Coulter
Outside the realm of human vision is an entire electromagnetic spectrum of wonders. Each type of light–from radio waves to gamma-rays–reveals something unique about the universe. Some wavelengths are best for studying black holes; others reveal newborn stars and planets; while others illuminate the earliest years of cosmic history.
Sections: Technology | No Comments
NASA explains Storms from the Sun and their effects on EarthWritten by Karen C. Fox
Scientists monitor several kinds of space “weather” events — geomagnetic storms, solar radiation storms, and radio blackouts – all caused by these immense explosions on the sun. ![]() Artist illustration of events on the sun changing the conditions in Near-Earth space. (Credit: NASA) «Read the rest of this article» Sections: Technology | No Comments
NASA’s WISE Mission Captures Black Hole’s Wildly Flaring JetWhitney Clavin,
Scientists study jets to learn more about the extreme environments around black holes. Much has been learned about the material feeding black holes, called accretion disks, and the jets themselves, through studies using X-rays, gamma rays and radio waves. But key measurements of the brightest part of the jets, located at their bases, have been difficult despite decades of work. WISE is offering a new window into this missing link through its infrared observations. ![]() This artist's concept illustrates what the flaring black hole called GX 339-4 might look like. Infrared observations from NASA's Wide-field Infrared Survey Explorer (WISE) reveal the best information yet on the chaotic and extreme environments of this black hole's jets. (Image credit: NASA) «Read the rest of this article» Sections: News | No Comments
|
Archives
|
|
© 2006-2018 Clarksville, TN Online is owned and operated by residents of Clarksville Tennessee.
|