Our solar system consists of the major heavenly bodies, including the sun and
eight planets – Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and
Neptune. It also includes the dwarf planet Pluto; the satellites of planets;
comets, asteroids and meteoroids; and interplanetary matter. Let’s look at some
facts about the solar system.
Solar minimums mark a period of reduced activity on
the sun and sunspots and solar flares are less frequent.
At solar minimum, the sun's otherwise violent
surface takes on a calmer and almost idyllic appearance but this faux calm can
lead to magnetic storms which interfere with satellites, affect air travel and
can even knock out power grids.
At the cycle's peak, solar maximum, the sun is
continually peppered with spots, some as big as the planet Jupiter.
As the sun reached solar minimum, it increases the
likelihood that activity levels will soon rebound with vigour.
A panel of experts from NASA and NOAA recently
concluded that the current solar cycle is nearing its end, and the next one will
begin when this streak ends.
If the solar minimum prediction is correct, it would
make the current Solar Cycle 24, the seventh longest on record at 11.4
years.
Solar Cycle 25, the next period, is expected to peak
in July 2025.
'Solar Cycle 25 may have a slow start, but is
anticipated to peak with solar maximum occurring between 2023 and 2026, and a
sunspot range of 95 to 130,' the experts said.
'This is well below the average number of
sunspots.
They also state that solar cycle 24 has continued a
trend of steadily declining activity in the sun, but predict this will change
with cycle 25.
Solar minimum is a useful time for studying the
evolution of active regions without the complication of overlapping and
interacting regions.
An eerily still surface of the sun has been captured by NASA. Showing a solid
orange globe, the image it produced is the result of a lack of sunspot activity
in the star's magnetic field. During this point, the Sun's otherwise violent
surface takes on a calmer and almost idyllic appearance.
Active regions can persist for days to months, and
are observed to rotate across the Sun’s face many times.
Lack of sunspot activity in the sun is due to a
continuing period of inactivity in the star's magnetic field.
As the sun moves through its 11-years cycle, it
experiences active and quiet periods known as the solar maximum and solar
minimum.
This solar slowdown often causes temporary cooling
in Earth's atmosphere.
When the sun entered a solar minimum between 1650
and 1710, NASA said the Earth was plunged into a 'deep freeze'.
'1650 to 1710, temperatures across much of the
Northern Hemisphere plunged when the sun entered a quiet phase now called the
Maunder Minimum.
'During this period, very few sunspots appeared on
the surface of the sun, and the overall brightness of the sun decreased
slightly.
'Already in the midst of a colder-than-average
period called the Little Ice Age, Europe and North America went into a deep
freeze: alpine glaciers extended over valley farmland; sea ice crept south from
the Arctic; and the famous canals in the Netherlands froze regularly—an event
that is rare today.
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