The sun will be very active during the next solar eclipse to cross North America, making it an excellent viewing and scientific opportunity.
Solar eclipses are dramatic events as a rule. But the total eclipse coming on April 8 is going to ratchet up the experience.
A longer time to observe the eclipse and a more active sun will make it both a better show and a boon for scientists who have more telescopes, sensors and satellites available to study the sun than ever before. Even viewers without other equipment should be able to see the streamers and a coronal mass ejection, if it occurs.“There’s nearly 32 million people inside the path ,” says cartographer Michael Zeiler. That’s about 2½ times as many as during the 2017 eclipse.
Those radars monitor a gaslike plasma of positively charged atoms and negatively charged electrons in the Earth’s atmosphere, created when the sun’s rays kick electrons off atoms. The plasma makes up the ionosphere, which can act like a mirror for radio signals and bounce signals from terrestrial transmitters back down to receivers, instead of letting the signals head out to space. That extends the range that transmitters can reach.
“If we would be so lucky to have one,” says astrophysicist Nour Raouafi of Johns Hopkins Applied Physics Laboratory in Laurel, Md., and it’s “propagating toward the spacecraft … it will be fascinating to see it during a total solar eclipse.” Improved cameras and spectrometers, for example, will offer detailed views of the corona close to the sun’s surface. “This eclipse is also twice as long as the last one. On the ground, it’s 4.5 minutes,” Caspi says, “In the air, we’re going to get 6.5 minutes per airplane.”
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