|Is the core hotter than the corona?
|Question Date: 2004-01-26|
Whether or not the core is hotter than the corona
depends on what type of "hotter" you are looking
If we examine our own sun, then we see
that on average the core is about 15 million
degrees Celsius while the Corona is only 1 to 2
million degrees. However, there are occasionally
highly active parts of the corona called solar
flares where temperatures can go above 20 million
What solar flares are and
why they happen is still somewhat of a mystery,
and scientists are still observing and looking for
ways to explain them. Also, solar flares aren't
the only mystery that the corona has for science.
Scientists believe the core of the star must be 15
million degrees Celsius because such high
temperatures are necessary for fusion when light
nuclei like hydrogen are smashed so hard together
they fuse and release energy. The temperature goes
down as one goes from the core to the surface of
the sun, but past the surface lies the corona, and
in the corona the temperature increases rather
than decreases with increasing distance from the
sun! Why the corona has these interesting
characteristics is an area of active research.
So the answer to your question is most of the
time the core is hotter than the corona, but there
are powerful events called solar flares, which
science is still trying to understand, that can
beat out even the core. I hope this answer further
sparks your curiosity and helps you see that
science is still growing in order to better
explain nature. Keep up the good questions!
The corona is definitely hotter than the Earth's
core but it is cooler than the Sun's core. I
looked up some numbers for you. The temperature of
the corona is about 1,000,000 degrees Celsius and
the temperature of the sun's core is about
15,000,000 degrees Celsius. In contrast, the
temperature of the Earth's core is about
3,000-5,000 degrees Celsius.
Yes, the core of the sun is hotter than the
corona. The core is something like 15 million
degrees C, and the corona is at something like 2
to 4 million degrees. The corona is hotter than
the surface of the sun, but not as hot as the core
(where thermonuclear fusion reactions are taking
place,which keep the sun "alive").
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