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SUN
MOST FAMOUS 8 PLANET IN SOLAR SYSTEM 2024
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MOST FAMOUS 8 PLANET IN SOLAR SYSTEM
The sun, like all stars, is a blazing ball of fusion-powered plasma. From its surface emerge magnetic field lines that can cause dark patches known as sunspots. Turn up the activity of these magnetic whorls, and you get more solar storms flinging deadly charged particles and radiation throughout our solar system. If enough of these punishing waves hit a rocky planet, that planet might end up microwaved into a dreary condition where nothing could live.
So how is it that we’re alive? A study released Thursday in the journal Science suggests that our sun is rather tame compared with its stellar siblings, and that hundreds of other sun-like stars in our galaxy have on average five times more magnetic activity than our parent star. In other words, the sun is a bit humdrum, which might be good for life here on Earth.
Astronomers have been tracking the appearance of sunspots since the time of Galileo, providing a proxy for solar activity stretching back four centuries. Some previous studies also implied that the sun was quieter than other similar stars. But competing evidence has also found the sun’s activity level is normal for stars of its size.
“This triggered the question: ‘Is the sun a real sun-like star?’” said Timo Reinhold, an astrophysicist at the Max Planck Institute for Solar System Research in Göttingen, Germany, and co-author of the paper
MERCURY
MOST FAMOUS 8 PLANET IN SOLAR SYSTEM 2024
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MOST FAMOUS 8 PLANET IN SOLAR SYSTEM
Named for the fleet-footed Roman messenger god, Mercury is the closest planet to the sun, zipping around our parent star at an average of 36 million miles away. However, Mercury’s orbit is not a perfect circle. The planet can pass as close as 29 million miles and as far away as 43 million miles.
Living up to its name, Mercury is the fastest planet in the solar system, speeding along at about 29 miles per second and completing each orbit around the sun in just 88 Earth days. Mercury is also the smallest planet in the solar system, measuring just 3,032 miles wide at its equator. That makes it only slightly larger than Earth’s moon.
Because Mercury is so small and so close to the sun, it is the most elusive of the five planets that are visible to the naked eye. You can only catch Mercury at dawn and dusk, and it usually does not rise far above the horizon. But that’s not the only time the tiny planet makes an appearance. Because of its position in the solar system, Mercury passes between Earth and the sun 13 times each century in an event known as a transit. During a transit of Mercury, observers on Earth can see the planet in silhouette as it seems to sweep across the sun’s disk.
VENUS
MOST FAMOUS 8 PLANET IN SOLAR SYSTEM
Venus is only a little bit smaller than our home planet, with a mass of about 80% of Earth’s. Venus is not a gas planet, but a rocky planet. The interior of Venus is made of a metallic iron core that’s roughly 2,400 miles (6,000 km) wide.
EARTH
The inner core’s outer shell and its newly confirmed innermost sphere both are hot enough to be molten but are a solid iron-nickel alloy because the incredible pressure at the center of the Earth renders it a solid state.
“I like to think about the inner core as a planet within the planet. Indeed, it is a solid ball, approximately the size of Pluto and a bit smaller than the moon,” said Australian National University geophysicist and study co-author Hrvoje Tkalčić.
“If we were somehow able to dismantle the Earth by removing its mantle and the liquid outer core, the inner core would appear shining like a star. Its temperature is estimated to be about 5,500-6,000 degrees (Celsius/9,930-10,830 Fahrenheit), similar to the sun’s surface temperature,” Tkalčić said.
The transition from the outer part of the inner core to the innermost sphere appears to be gradual rather than a sharp boundary, Pham said. The researchers were able to differentiate the two regions because the seismic waves acted
differently between them
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MOST FAMOUS 8 PLANET IN SOLAR SYSTEM 2024
MARS
The red planet Mars has been known to humans since ancient times. It has been the target of dozens of space missions and will hopefully soon become the first planet astronauts will land on. In this article, we’ll tell you everything you need to know about Mars and answer the most common questions related to the Red Planet. We’ll also highlight upcoming celestial events related to Mars. Use the Sky Tonight app to easily locate the Red Planet in the sky. Let’s get started!
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MOST FAMOUS 8 PLANET IN SOLAR SYSTEM 2024
JUPITAR
For years, scientists have wondered why Jupiter doesn’t have thick, bright rings like neighboring Saturn does, and now they think they might know why.
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