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The sun, whose rotation around its axis lasts approximately 24 and a half days, is approximately 1.4 million km, while its surface temperature is approximately 5500 ° C.
Reinhold explained that “the temperature and duration of rotation around the axis are believed to be the main components of the generator or motor within the star, which generates its magnetic field and ultimately the number and size of the points that cause the brightness to change. “
He noted that “the presence of such stars with measurements very similar to our sun, but they are five times more variable than them, is surprising.”
Increased magnetic activity associated with sunspots can lead to solar flares, massive plasma and magnetic field emissions from the outer end of the solar atmosphere, and other electromagnetic phenomena that can affect Earth, such as disruption of satellites and communications and the danger of astronauts.
However, the monotony of solar activity can be a good thing for Earth and people, as Reinhold believes that “having a star more active than necessary would definitely change the living conditions on the planet, so living with a very boring star is not the worst option. “
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In our solar system, the researchers say, the sun is a much less active star than similar stars, in terms of changes in brightness caused by sunspots and other phenomena.
The researchers described the sun as “dull” in character, noting that at the same time, it may be the best choice for humans on Earth.
The researchers said, in a study published in the journal “Science” on Thursday, that an examination of 369 sun-like stars in terms of surface temperature, size and time of rotation around the axis showed that the change in brightness of other stars is 5 times the average of the sun, according to Reuters
“This change is caused by dark spots on the star’s surface during rotation,” said Timo Reinhold, principal investigator at the Max Planck Institute for Solar System Research in Germany.
Ranhold added: “The number of sunspots on the surface is a direct measure of solar activity.”
The sun is a hot ball of hydrogen and helium, a medium-sized star that formed more than 4.5 billion years ago and is now almost halfway through its life.
The sun, whose rotation around its axis lasts approximately 24 and a half days, is approximately 1.4 million km, while its surface temperature is approximately 5500 ° C.
Reinhold explained that “the temperature and duration of rotation around the axis are believed to be the main components of the generator or motor within the star, which generates its magnetic field and ultimately the number and size of the points that cause the brightness to change. “
He noted that “the presence of such stars with measurements very similar to our sun, but they are five times more variable than them, is surprising.”
Increased magnetic activity associated with sunspots can lead to solar flares, massive plasma and magnetic field emissions from the outer end of the solar atmosphere, and other electromagnetic phenomena that can affect Earth, such as disruption of satellites and communications and the danger of astronauts.
However, the monotony of solar activity can be a good thing for Earth and people, as Reinhold believes that “having a star more active than necessary would definitely change the living conditions on the planet, so living with a very boring star is not the worst option. “
