Tracking down energetic cosmic rays
Once in a while, nature runs experiments that no human lab can match. Ultra-high-energy cosmic rays are a good example. Cosmic rays are fast, high energy particles from space that strike Earth’s atmo…
Cherenkov radiation
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HESS telescopes discover new source of gamma rays called a superbubble
Astronomers using the HESS telescopes have discovered a new source of high-energy gamma rays. Dubbed a superbubble, it appears to be a massive shell of gas and dust 270 light-years in diameter being b…