SPACE

space

A truly global system

Like the GPS navigation system in your car or smartphone, a high-precision GPS receiver uses signals from satellites to determine the distance from the receiver to the satellite. But that’s where the similarities end. 

30 Apr 2014

Observing a plate boundary

The U.S. Plate Boundary Observatory (PBO), a component of EarthScope, includes more than a thousand continuous GPS stations arrayed across the western United States and Alaska. 

30 Apr 2014

Bare Earth Elements: Mars rocks wear manganese coats

Several rocks on the surface of Mars are coated with distinctive dark-colored surface layers enriched in manganese that, while sharing similarities with manganese-rich rock varnish found on Earth, do not appear to be varnish themselves based on differences in trace element levels, according to new research presented Wednesday by Nina Lanza of Los Alamos National Laboratory at the Lunar and Planetary Science Conference (LPSC) in The Woodlands, Texas.

19 Mar 2014

Comet ISON still intrigues and inspires, even after its demise

Comet ISON is dead, but its memory will live on." That eulogy for the much-discussed “comet of the century" was delivered today by Karl Battams of the Naval Research Laboratory in Washington, D.C., during a series of reports presented at the annual meeting of the American Geophysical Union (AGU) in San Francisco, Calif.

11 Dec 2013

Juno salutes its home planet and heads to Jupiter

Thanks to orbital mechanics, a spacecraft heading to Jupiter must go most of the way there, then loop around the sun, zoom back close to Earth, and finally head out again on its mission to the largest planet in the solar system. That's the story of Juno, launched by NASA on Aug. 5, 2011, and due to arrive at Jupiter on July 4, 2016. Its journey required a boost in velocity, relative to the sun, which it received when it flew as close as 559  kilometers above Earth on Oct. 9, 2013.

11 Dec 2013

In or Out? Has Voyager left the solar system?

San Francisco - There is a possibility that Voyager, the U.S. spacecraft launched in 1977, which is thought to have left the heliosphere and entered interstellar space last year, could still be "inside," said Ed Stone, Voyager project chief scientist, today at the annual meeting of the American Geophysical Union in San Francisco.

09 Dec 2013

How strong was the Carrington Event?

NASA has described the magnetic field of the coronal mass ejection (CME) associated with the 1859 Carrington Event, the largest solar storm ever detected, as “extremely intense” relative to other CMEs. The amount of plasma it ejected is difficult to estimate, but more important in determining its strength is how fast it arrived.

21 Jan 2013

Benchmarks: January 1, 1960: The Discovery of "Extinct Radioactivity" The quest to date the elements that formed the solar system

On June 30, 1918, Leo Kern saw a fireball blaze across the sky above his farm near Richardton, N.D., lighting up the night sky as if it were daytime and then exploding with a deafening boom that shook houses and rattled windows. Kern ducked behind a telegraph pole as fragments that sounded like “whistling bullets” struck his barn, he later reported to geologist T.T. Quirke of the University of Minnesota. What Kern and other witnesses all over  the southwestern corner of the state had seen was a 90-kilogram meteor entering Earth’s atmosphere and breaking up 100 kilometers above the surface. Kern had no way of knowing it at the time, but he had also witnessed the arrival of a message from the dawn of the solar system — one that scientists wouldn’t decode for another 42 years. 
 
01 Jan 2013

Down to Earth With: Jacob Haqq-Misra

Jacob Haqq-Misra is all but addicted to music, which is why the astrobiologist balances his time between research and performing as a percussionist and vocalist with the psychedelic jam band, Mysterytrain.

18 Nov 2012

Voices: Riding the dragon: Commercial space exploration

“Looks like we’ve got us a Dragon by the tail.”

So said astronaut Don Pettit upon the successful capture of the SpaceX Dragon capsule by the robotic arm on the International Space Station (ISS) in May, heralding a revolution in space exploration with a bit of humor. We have entered the era of private spaceflight, and just in time.

01 Sep 2012

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