![]() | |||
| |||
|
|||
Recent Articles
|
Topic: Ions
Using observations of galactic cosmic rays — a type of highly energetic particle — from NASA’s Voyager spacecraft scientists calculated the total pressure from particles in the outer region of the solar system, known as the heliosheath. «Read the rest of this article» Sections: Technology | No Comments
NASA celebrates the 50th Anniversary of the Apollo 11 Moon Landing
Words such as these were emblazoned in dozens of languages on the front page of newspapers around the world, echoing the first part of President John F. Kennedy’s bold challenge to the nation, made more than eight years earlier – to land a man on the Moon. That part was successfully accomplished on July 20th, 1969. The second part of the challenge, the safe return to Earth, would have to wait four more days. «Read the rest of this article» Sections: Technology | No Comments
NASA’s Juno Spacecraft to enter orbit around Jupiter July 4thWritten by DC Agle
As of Thursday, Juno is 18 days and 8.6 million miles (13.8 million kilometers) from Jupiter. On the evening of July 4th, Juno will fire its main engine for 35 minutes, placing it into a polar orbit around the gas giant. During the flybys, Juno will probe beneath the obscuring cloud cover of Jupiter and study its auroras to learn more about the planet’s origins, structure, atmosphere and magnetosphere. ![]() This artist’s rendering shows NASA’s Juno spacecraft making one of its close passes over Jupiter. (NASA/JPL-Caltech) «Read the rest of this article» Sections: Technology | No Comments
NASA’s Van Allen Probes discovers new information about Earth’s Ring CurrentNASA’s Goddard Space Flight Center
The ring current has long been thought to wax and wane over time, but the new observations show that this is true of only some of the particles, while other particles are present consistently. Using data gathered by the Radiation Belt Storm Probes Ion Composition Experiment, or RBSPICE, on one of the Van Allen Probes, researchers have determined that the high-energy protons in the ring current change in a completely different way from the current’s low-energy protons. ![]() During periods when there are no geomagnetic storms affecting the area around Earth (left image), high-energy protons (with energy of hundreds of thousands of electronvolts, or keV; shown here in orange) carry a substantial electrical current that encircles the planet, also known as the ring current. During periods when geomagnetic storms affect Earth (right), new low-energy protons (with energy of tens of thousands of electronvolts, or keV; shown here in magenta) enter the near-Earth region, enhancing the pre-existing ring current. (Johns Hopkins APL) «Read the rest of this article» Sections: Technology | No Comments
NASA’s New Horizons Spacecraft observes how Pluto’s atmosphere interacts with the Solar WindNASA Headquarters
This is according to the first analysis of Pluto’s interaction with the solar wind, funded by NASA’s New Horizons mission and published today in the Journal of Geophysical Research – Space Physics by the American Geophysical Union (AGU). ![]() Four images from New Horizons’ Long Range Reconnaissance Imager (LORRI) were combined with color data from the Ralph instrument to create this global view of Pluto. The images, taken when the spacecraft was 280,000 miles (450,000 kilometers) away from Pluto, show features as small as 1.4 miles (2.2 kilometers). (NASA/JHUAPL/SwRI) «Read the rest of this article» Sections: Technology | No Comments
NASA study shows Twisting Whip like Wave emitting from Black HoleWritten by Whitney Clavin
Scientists used this instrument to explore the galaxy/black hole system known as BL Lacertae (BL Lac) in high resolution. “The waves are excited by a shaking motion of the jet at its base,” said David Meier, a now-retired astrophysicist from NASA’s Jet Propulsion Laboratory and the California Institute of Technology, both in Pasadena. ![]() This cartoon shows how magnetic waves, called Alfven S-waves, propagate outward from the base of black hole jets. (Caltech) «Read the rest of this article» Sections: Technology | No Comments
NASA researchers study of Ionosphere may help improve GPS CommunicationsWritten by Elizabeth Landau
Researchers at NASA’s Jet Propulsion Laboratory, Pasadena, California, in collaboration with the University of New Brunswick in Canada, are studying irregularities in the ionosphere, a part of the atmosphere centered about 217 miles (350 kilometers) above the ground that defines the boundary between Earth and space. ![]() The Aurora Borealis viewed by the crew of Expedition 30 on board the International Space Station. The sequence of shots was taken on February 7, 2012 from 09:54:04 to 10:03:59 GMT, on a pass from the North Pacific Ocean, west of Canada, to southwestern Illinois. (NASA/JSC) «Read the rest of this article» Sections: Technology | No Comments
NASA’s Cassini Spacecraft was bathed in beam of electrons during flyby of Saturn’s moon HyperionWritten by Preston Dyches
A new analysis of data from NASA’s Cassini mission has revealed that, during a 2005 flyby of Saturn’s moon Hyperion, the spacecraft was briefly bathed in a beam of electrons coming from the moon’s electrostatically charged surface. ![]() Cassini obtained this false-color view of Saturn’s chaotically tumbling moon Hyperion during a flyby on Sept. 26, 2005. The spacecraft detected a strong electrostatic charge on the moon’s surface, a first for any body other than Earth’s moon. (NASA/JPL-Caltech/Space Science Institute) «Read the rest of this article» Sections: Technology | No Comments
NASA’s Chandra X-ray Observatory discovers a mystery in Perseus ClusterWritten by Tony Phillips
“I couldn’t believe my eyes,” says Esra Bulbul of the Harvard Center for Astrophysics. “What we found, at first glance, could not be explained by known physics.” Together with a team of more than a half-dozen colleagues, Bulbul has been using Chandra to explore the Perseus Cluster, a swarm of galaxies approximately 250 million light years from Earth. «Read the rest of this article» Sections: Technology | No Comments
NASA’s Galileo mission observations of Saturn’s moon Europa gives target areas for future studyWritten by Guy Webster
If you want to learn about the deep saltwater ocean beneath this unusual world’s icy shell — as many people do who are interested in possible extraterrestrial life — you might target your investigation of the surface somewhere that has more of the up-from-below stuff and less of the down-from-above stuff. ![]() This graphic of Jupiter’s moon Europa maps a relationship between the amount of energy deposited onto the moon from charged-particle bombardment and the chemical contents of ice deposits on the surface in five areas of the moon (labeled A through E). (Credit: NASA/JPL-Caltech/Univ. of Ariz./JHUAPL/Univ. of Colo.) «Read the rest of this article» Sections: Technology | No Comments
|
Now playing at the Movies
Archives |
|
© 2006-2021 Clarksville, TN Online is owned and operated by residents of Clarksville Tennessee.
|