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Another reason could be the weakening of Earth's magnetic field, which helps protect us from deep-space radiation.

The radiation sensors onboard our helium balloons detect X-rays and gamma-rays in the energy range 10 ke V to 20 Me V.

It looks dark in this extreme UV image from NASA's Solar Dynamics Observatory because the hot gas normally contained there is missing. High-latitude sky watchers should be alert for auroras when the solar wind arrives, especially in the southern hemisphere where autumn darkness favors visibility. The students are selling these balls as a fundraiser for their cosmic ray ballooning. We also have "space balls" for the Red Sox, Angels, Dodgers, Giants, and Padres. If your home team is not on the list, let us know and we will fly it for you on an upcoming flight.

Each baseball comes with a greeting card showing the ball in flight and telling the story of its journey to the stratosphere. NASA's Aeronomy of Ice in the Mesosphere (AIM) spacecraft has spotted its first noctilucent clouds (NLCs) of the 2018 season.

[Larger image] [movies] Potentially Hazardous Asteroids (PHAs) are space rocks larger than approximately 100m that can come closer to Earth than 0.05 AU.

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

Previous data from AIM have shown that NLCs are like a great "geophysical light bulb." They turn on every year in late spring, reaching almost full intensity over a period of 5 to 10 days.

This means observers on the ground could begin to see them not long after AIM does.

Furthermore, there are studies ( #1, #2, #3, #4) linking cosmic rays with cardiac arrhythmias and sudden cardiac death in the general population.

Our latest measurements show that cosmic rays are intensifying, with an increase of more than 13% since 2015: Why are cosmic rays intensifying? Solar storm clouds such as coronal mass ejections (CMEs) sweep aside cosmic rays when they pass by Earth.

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