Electrons "re-combine" with oxygen, turing ions into atoms. Oxygen ions are hungry for electrons, and the newly arriving molecules are eager to provide them. When the Falcon 9 rocket reaches the F-layer, it adds water (H2O) and carbon dioxide (CO 2) to the mix, spewing the molecules out of its engine. Of particular interest is the F-layer of the ionosphere, because it is rich in O +. In simplified form, here is what happens: The upper atmosphere is filled with oxygen ions (O +). What happened? Space physicist Jeff Baumgardner of Boston University has the answer: "This glow is probably the exhaust gasses from the rocket's 2nd stage causing the ionosphere to recombine quickly. This is a well studied phenomenon when rocket engines are firing in the altitude regime 200-250 km."Ībove: A similar display of red light appeared over the eastern USA following the launch of a Titan IV rocket on April 30, 2005. However, there was no geomagnetic storm in progress. The glow appeared about 10 minutes after the Falcon 9 rocket lifted off, and many observers likened its appearance to auroras. Photographers in New York, Ohio, North Carolina and Tennesee saw it, too. "We took a 30 second exposure, and when the exposure was finished I saw this red glowing area covering the Milky Way."
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"I went out with some first time photographers to teach them how to set up their cameras for night sky photography," says Hoffman. It looked like the aurora borealis, as shown in this photo from Christopher Hoffman in Saint Mary's County, Maryland: A red glow stretched across the Milky Way. Photographers accustomed to seeing these launches were surprised when something unusual happened. On Sunday morning, June 19th, SpaceX launched a Falcon 9 rocket from Cape Canaveral. SPACEX MYSTERY, SOLVED: The mystery of SpaceX's "rocket powered auroras" has been solved. Set your alarm for dawn and enjoy the show! Sky maps: June 22, 23, 24, 25, 26.
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This week the Moon will hop from planet to planet, producing a series of beautiful conjunctions. MORNING PLANETS: For the first time in almost 20 years, the five naked-eye planets have lined up in the morning sky in order of their distance from the sun. Neutron counts from the University of Oulu's Sodankyla Geophysical Observatory show that cosmic rays reaching Earth are slowly declining-a result of the yin-yang relationship between the solar cycle and cosmic rays.
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Credit: SDO/HMIĬosmic Rays Solar Cycle 25 is beginning, and this is reflected in the number of cosmic rays entering Earth's atmosphere.
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