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3,045 articles from NASA


WEDNESDAY 19. NOVEMBER 2008


Discovered: Cosmic Rays from a Mysterious, Nearby Object

An international team of researchers has discovered a puzzling surplus of high-energy electrons bombarding Earth from space. The source of these cosmic rays is unknown, but it must be close to the solar system and it could be made of dark matter.


FRIDAY 14. NOVEMBER 2008



TUESDAY 11. NOVEMBER 2008



SUNDAY 9. NOVEMBER 2008



THURSDAY 30. OCTOBER 2008


Magnetic Portals Connect Earth to the Sun

Researchers have discovered 'magnetic portals' forming high above Earth that can briefly connect our planet to the Sun. Not only are the portals common, one space physicist contends they form twice as often as anyone had previously imagined.


TUESDAY 28. OCTOBER 2008


Halloween Sky Show

The planets are gathering for spooky sunset sky show on Oct. 31st. Read today's story to find out where to look.


WEDNESDAY 22. OCTOBER 2008


The Case of the Missing Gamma-ray Bursts

Gamma-ray bursts are by far the brightest and most powerful explosions in the Universe, second only to the Big Bang itself. So it might seem a bit surprising that a group of them has gone missing.


TUESDAY 21. OCTOBER 2008


The Oddball Hosts of Gamma-ray Bursts

Cosmic explosions known as gamma-ray bursts are curiously picky about where they explode. Shunning spiral galaxies like the Milky Way, gamma-ray bursts prefer to 'go off' in oddball star systems that astronomers are just beginning to understand.


MONDAY 20. OCTOBER 2008



FRIDAY 17. OCTOBER 2008


Discovered: A New Kind of Pulsar

NASA's Fermi Gamma-ray Space Telescope has discovered a new kind of pulsar that hints at a previously unsuspected population of stars waiting to be found in the Milky Way.


THURSDAY 16. OCTOBER 2008


Gamma-ray Bursts: The Mystery Continues

More than four decades after they were discovered, gamma-ray bursts continue to mystify astrophysicists. Next week, experts from 25 countries will converge on Huntsville, Alabama, to discuss and debate clues to the biggest explosions since the Big Bang itself.


FRIDAY 10. OCTOBER 2008


The Day the World Didn't End

Last month when scientists switched on the Large Hadron Collider, the world did not come to an end. In today's story, a particle physicist explains why not--and why Earth is safe from black holes when the collider is reactivated in the months ahead.


THURSDAY 9. OCTOBER 2008



WEDNESDAY 8. OCTOBER 2008



THURSDAY 2. OCTOBER 2008


How Round is the Sun?

Scientists using NASA's RHESSI spacecraft have measured the roundness of the sun with unprecedented precision, and they find that it is not a perfect sphere. During years of high solar activity the sun develops a thin "cantaloupe skin" that significantly increases its apparent oblateness.


WEDNESDAY 1. OCTOBER 2008


MESSENGER Returns to Mercury

NASA's MESSENGER spacecraft is returning to Mercury. On Monday, Oct. 6, 2008, the probe will conduct the second of three planned flybys and photograph most of Mercury's remaining unseen surface.

Spotless Sun: Blankest Year of the Space Age

Astronomers who count sunspots have announced that 2008 has become the "blankest year" of the Space Age. Sunspot counts are at a 50-year low, signifying a deep minimum in the 11-year cycle of solar activity.


TUESDAY 23. SEPTEMBER 2008



FRIDAY 19. SEPTEMBER 2008


Pollen Alert!

NASA is teaming up with public health organizations to create a pollen alert system that could help people with maladies ranging from common hay fever to serious heart and lung diseases.


WEDNESDAY 17. SEPTEMBER 2008


Polar Crown Prominences

Japan's Hinode spacecraft is beaming back must-see movies of a spectacular solar phenomenon known as 'polar crown prominences.'


FRIDAY 12. SEPTEMBER 2008


Spooky Hurricane Science

To improve hurricane forecasting, NASA engineers are spending time in a spooky room where 'no one can hear you scream.'


WEDNESDAY 10. SEPTEMBER 2008



FRIDAY 5. SEPTEMBER 2008



WEDNESDAY 3. SEPTEMBER 2008


Amateur Astronomers See Perseids Hit the Moon

Backyard astronomers watching the Perseid meteor shower last month saw meteoroids hitting not only Earth but also the Moon. They recorded the impacts using backyard telescopes and off-the-shelf cameras, showing that "lunar meteors" are easy targets for amateur observatories and that amateur astronomers can contribute to NASA's lunar research.