A planet orbits so close to its star that its magnetic fields interact

The second issue was that in some observations, there were no periodic signs. Because we have enough historical data, however, the researchers were able to track when the signal first appeared and disappeared. And he was able to find time and time – which correspond exactly to the events of the stars. (Think about the Sun’s orbit, and use another star.)

The researchers think that, during the hottest part of the sun, the signal from the Earth’s magnetic field is saturated. In the short term, the researchers suspect that there is not enough work to keep the magnetism going. Therefore, it is assumed that we see the chromosphere gas concentration at the intermediate level of the stellar activity.

How does the magnetic field first appear on stars? The researchers consider a number of theoretical models, but the only one that creates enough energy for the chromosphere is one in which magnetic loops connect the fields of the Earth and the stars. This model allows them to estimate the strength of the Earth’s magnetic field, which puts at least 6 Gauss, more than 10 the strength of the Earth.

While this may seem alarming, it is actually not unusual, even in our Sun. The magnetic field is similar to that of Jupiter, and Neptune’s magnetic field extends far beyond the distance between GJ 436 and Earth.

As we saw above, this is the first look at a magnetically driven shot in an exosolar system, but it’s not the first. And there are hundreds of additional systems with nearby planets that we can still explore. Therefore, over time, measurements of exoplanet magnetic fields may become common.

Science, 2026. DOI: 10.1126/science.adv3075 (About DOIs).