The Crab Nebula just blasted Earth with the highest-energy photons ever recorded

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One measured photon has roughly the energy of a falling ping-pong ball.

The Tibetan Plateau is a vast elevated plain almost five kilometers above sea level, sometimes called the Roof of the World. It is bordered to the south by the world’s highest mountain range and to the north by desert lands. It is one of the most isolated places on Earth.

But the extreme altitude makes it a useful place for scientists. In 1990, they built an observatory here to study the showers of subatomic particles that rain down from the upper atmosphere whenever it is hit by a high-energy cosmic ray. This work is better done at high altitude because there is less atmosphere to absorb the particles.

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Scientist Explains Why Mars is Red (and How it Could Happen On Earth, too)

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Mars is covered with a thin layer of radioactive substances including uranium, thorium and radioactive potassium.

Mars has not always been red. At least that is the theory proposed by a scientist who has discovered a reason as to how the red planet got its rosy color.

 

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Darkest Secret of the Universe Only Parsecs Away

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Misbehaving Matter 

THE universe’s darkest secret may be hiding not far from us. Three dwarf galaxies near the Milky Way appear to contain a higher proportion of invisible dark matter than any stellar system so far studied. If so, they are the ideal place to look to figure out what the stuff consists of.

Continue reading… “Darkest Secret of the Universe Only Parsecs Away”

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