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This is what happens when the 4th of July coincides with one of the deepest Solar Minima in a century.

Aurora alerts: SMS Text. Maybe even a "dream shot. Browse the Solar Eclipse Photo Gallery for more images from the path of totality, which stretched from the South Pacific across great observatories in Chile to the eastern reaches of Argentina. We decided to celebrate even more by flying the coins to the edge of space.

On June 23rd, the students of Earth to Sky Calculus launched this The students are selling the coins to support their cosmic ray ballooning program. The silver dollar is curved and reproduces the helmet of astronaut Buzz Aldrin. The opposite side of the coin shows Neil's iconic footprint on the Moon. Each of these coins comes with a greeting card showing the item in flight and a certificate of authenticity. On Jul. In this diagram of the inner solar system, all of the fireball orbits intersect at a single point--Earth.

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The orbits are color-coded by velocity, from slow red to fast blue. We have developed a new predictive model of aviation radiation. We are constantly flying radiation sensors onboard airplanes over the US and and around the world, so far collecting more than 22, gps-tagged radiation measurements. E-RAD lets us do something new: Every day we monitor approximately flights criss-crossing the 10 busiest routes in the continental USA. Typically, this includes more than 80, passengers per day.

E-RAD calculates the radiation exposure for every single flight.

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The Hot Flights Table is a daily summary of these calculations. It shows the 5 charter flights with the highest dose rates; the 5 commercial flights with the highest dose rates; 5 commercial flights with near-average dose rates; and the 5 commercial flights with the lowest dose rates. Passengers typically experience dose rates that are 20 to 70 times higher than natural radiation at sea level.

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These energies span the range of medical X-ray machines and airport security scanners. Column definitions: 1 The flight number; 2 The maximum dose rate during the flight, expressed in units of natural radiation at sea level; 3 The maximum altitude of the plane in feet above sea level; 4 Departure city; 5 Arrival city; 6 Duration of the flight. These balloons are equipped with radiation sensors that detect cosmic rays, a surprisingly "down to Earth" form of space weather.

Cosmic rays can seed clouds , trigger lightning , and penetrate commercial airplanes.

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  5. Furthermore, there are studies 1 , 2 , 3 , 4 linking cosmic rays with cardiac arrhythmias and sudden cardiac death in the general population. The data points in the graph above correspond to the peak of the Reneger-Pfotzer maximum , which lies about 67, feet above central California. When cosmic rays crash into Earth's atmosphere, they produce a spray of secondary particles that is most intense at the entrance to the stratosphere. Physicists Eric Reneger and Georg Pfotzer discovered the maximum using balloons in the s and it is what we are measuring today.

    In this plot, dose rates are expessed as multiples of sea level. At 40, feet, the multiplier is closer to 50x. The radiation sensors onboard our helium balloons detect X-rays and gamma-rays in the energy range 10 keV to 20 MeV. Why are cosmic rays intensifying? Brit pensioner, 77, found dead in cinema seat after watching horror movie. Corbynista ditches bid to deselect pregnant MP for criticising Chris Williamson. Mum, 59, 'attacked' by security after taking a picture at end of Aladdin.

    Elite Royal Navy bomb disposal divers sent to prove Iran attacked Gulf tankers. We're hell-bent on wiping out offence, so why are oldies fair game for jokes?


    These head-scratching designs should never have got off the drawing board. Cambridge student quits as she 'doesn't want to benefit from white privilege'. Afghan asylum seeker 'stabbed random shoppers after asking if they were English'. Cops dig up field in hunt for estate agent Suzy Lamplugh missing since Passenger 'without valid ticket' has 'teeth knocked out' by cops on train. Terrifying moment boy, 4, falls down the gap between train and platform. Brit hunter poses over corpses of 'Big 5' endangered animals killed for sport. Great-grandad who killed boy smiles in smug snap on 7th birthday he never had.

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    Family barbecues 'create almost as much air pollution as mile car trips'. Nan's throat seriously injured after cycling into rope left as a 'prank'. Benefits Street star Fungi dies at 50 from heart attack 'triggered by overdose'. Follow The Sun.

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    Your Sun Sign in. News Corp WSJ. Sign in. All News. Detectives are considering the possibility that a stranger could have targeted Kelly, in what they have described as a 'vicious and prolonged attack'. Weatherwatch Weatherwatch: warm winter sun — there's a word for that. To apricate is to bask in the sun, and, winter or summer, the sun can clean and disinfect. Published: 22 Feb Starwatch Starwatch: look for the waxing crescent moon just after sunset.

    Published: 3 Feb Too much sun or not enough? How to get the balance right Gideon Meyerowitz-Katz. Published: 1 Feb The long read Why we should be watching the sun, not the clock. Published: 11 Jan Starwatch Starwatch: Earth is at its closest to the Sun — but it's still midwinter. On Thursday Earth will be at perihelion, but the northern hemisphere is tilted away from the Sun, so we lose much of the benefit. Published: 30 Dec Country diary Country diary: the elements collide in a rite of autumn.

    Budle Point, Northumberland: As people often do when watching sunsets, we slip into a reverent silence, as if observing a ceremony.