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Astronomers Solve Puzzle Of Mysterious Streaks In Radio Images Of The Sky

KentuckyFC (1144503) writes | about 5 months ago

2

KentuckyFC (1144503) writes "Back in 2012, astronomers constructed an array of 256 radio antennas in the high deserts of New Mexico designed to listen for radio waves produced by gamma ray bursts, one of the most energetic phenomena in universe and thought to be associated with the collapse of a rapidly rotating stars to form neutron stars and black holes. The array generates all sky images of signals produced in the 25 MHz to 75 MHz region of the spectrum. But when researchers switched it on, they began to observe puzzling streaks across the sky that couldn't possibly be generated by gamma ray bursts. One source left a trail covering more than 90 degrees of the sky in less than 10 seconds. This trail then slowly receded to an endpoint which glowed for around 90 seconds. Now the first study of these transient radio signals has discovered that they are almost certainly produced by fireballs as they burn up after entering the Earth's atmosphere. The conclusion comes after the researchers were able to match several of the radio images with visible light images of fireballs gathered by NASA's All Sky Fireball Network. That solves the mystery but not without introducing another to keep astrophysicists busy in future. The question they're scratching their heads over now is how the plasma trails left by meteors can emit radio waves at this frequency."

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Duh! they don't emit it they reflect it (1)

Obscene_CNN (3652201) | about 5 months ago | (#47182721)

The fireball trails don't emit radio energy they reflect it. https://en.wikipedia.org/wiki/... [wikipedia.org]

Too much bs from medium.com already ! (0)

Anonymous Coward | about 5 months ago | (#47183017)

Lately /. has turned into a conduit for several websites to gain readership, one of those is http://medium.com/ [medium.com]

Enough already !

Slashdot is not and should never be used as a portal for site owners to gain readership !

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