Astronomers Accidentally Uncover Magnetic Fields on Alien Worlds That May Help Protect Their Atmospheres
Astronomers have discovered magnetic fields on seven ultra-hot Jupiters, which are gas giants orbiting close to their stars. This finding, resulting from a study originally aimed at measuring atmospheric winds, suggests that these magnetic fields may be comparable to those found in our Solar System. The research opens new avenues for understanding how magnetic fields influence planetary atmospheres and the potential for life on other worlds.
- ▪The study provides the first strong estimates of magnetic field strengths for seven ultra-hot Jupiters.
- ▪The researchers initially aimed to measure atmospheric winds but found anomalies indicating magnetic fields.
- ▪The magnetic fields on these planets could be four times stronger than Saturn's or half as strong as Jupiter's.
Opening excerpt (first ~120 words) tap to expand
Earth has one. So do Jupiter, Saturn, and Uranus. Mars and Venus, on the other hand, don't have a global version of it. We're talking about magnetic fields — invisible force fields generated deep inside some planets by the movement of electrically conducting material.On Earth, this magnetic shield does much more than create dazzling auroras. It also helps protect our atmosphere from harmful radiation, making the planet a friendlier place for life.Finding magnetic fields beyond our Solar System, however, has proven extremely difficult.
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Excerpt limited to ~120 words for fair-use compliance. The full article is at Discover Magazine.
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