All Stories by Ron Cowen
- Particle Physics
Reactor data hint at existence of fourth neutrino
A nuclear reactor experiment in China is providing new hints that a fourth type of neutrino, one more than the standard model of physics allows, may exist.
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- Planetary Science
Messages from Mercury
The latest data from a NASA spacecraft give compositional clues and reveal craters that could hold frozen water
- Space
Next solar cycle could be a no-show
Three lines of evidence suggest that the sun’s next activity cycle will be delayed for years and may not happen at all, an outcome that could have major implications for Earth’s climate.
- Space
No new particle from second detector
The chances that the Tevatron is producing a previously unknown particle drop substantially after the collider's DZERO experiment finds nothing extraordinary.
- Space
Superdupernovas
A new class of stellar explosion is very bright — and somewhat hard to explain.
- Space
Black hole jets in HD
Images of unprecedented resolution offer insight into how black holes swallow up matter.
- Space
Survey captures local universe in 3-D
The most complete view to date of the nearby cosmos takes in 45,000 galaxies.
- Space
Milky Way may get an extension
A newly discovered feature at its fringes suggests the galaxy is an uncommon beauty: One half appears to be nearly a mirror image of the other.
- Space
Crab Nebula activity keeps confounding
Unusually rapid fluctuations in the output of a supernova remnant send theorists scuttling for a reasonable explanation.
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Into orbit
MESSENGER pays a yearlong visit to Mercury.
