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What is the Biggest Planet in the World?

Ever wondered what is the largest planet in the world? This article will give you an overview of Jupiter, Saturn, Neptune, and Earth. In addition, you’ll learn about other planets like Mars, Mercury, and Venus. And as an added bonus, you’ll learn about how they were discovered. If you’re looking for a fun fact about the universe, read on! We’ll look at the history of these planets, and discuss their current sizes and shapes.


The largest planet in the solar system, Jupiter is made of a combination of liquid and gaseous matter. Its upper atmosphere is largely made up of hydrogen and helium, with traces of other elements present. The atmosphere of Jupiter is relatively dense, with seventy-five percent hydrogen and twenty-one percent helium. However, a rocky core lies underneath. A close examination of Jupiter’s atmosphere will reveal how many other elements are present.

The largest planet in our solar system is Jupiter, which is about two-and-a-half times the mass of Earth. It is the first of the so-called “gas giants” and is thought to contain a rocky core. While Jupiter is only 1/1000th as massive as the sun, it is so massive that it dwarfs the mass of all other planets in our solar system combined. Jupiter’s atmosphere is divided into bands, giving it a distinct appearance of whitish and reddish layers. The planet’s largest storm, the Great Red Spot, is twice the size of Earth and is a prominent feature of Jupiter’s atmosphere.

The temperature of Jupiter varies greatly. The surface temperature is around 340 K or 67 degC or 152 degrees Fahrenheit, which is about twice as hot as the surface of the Sun. The innermost layer of Jupiter, meanwhile, may be made of water ice or silicate minerals, which are similar to quartz. Although no one knows for sure, it is believed that the planet’s core has a temperature of up to 24,000 degC (43,000 degrees Fahrenheit), but scientists are still unable to determine what it’s made of.


Saturn is the second largest planet in our solar system, after Jupiter. It has almost twice the mass of Earth, but is far more oblate, meaning its rotational acceleration cancels out a much larger portion of its equatorial gravity. As such, it would appear to be floating on water. Its rotational speed is incredibly fast, completing a full rotation in just 10 hours. Saturn takes approximately 29 years to make one revolution around the Sun. In terms of density, it is only 12 percent as dense as Earth.

The atmosphere on Saturn is divided into six separate jet streams, one of which spirals around the planet like a hurricane. One of these is a six-sided jet stream, observed by the Voyager I and Cassini spacecrafts. This jet stream is over 20,000 miles long, is composed of 200-mile-per-hour winds, and has a massive rotating storm at its center. With this, we can see the different facets of Saturn.

The diameter of Saturn is 9.5 times larger than Earth. It is a gigantic body that can hold up to 760 Earths. Its surface area is so large that 763 Earths could fit inside it. To learn more about Saturn, visit NASA and Hubblesite. Also, listen to a podcast about the solar system – Astronomy Cast! It’s packed full of information on planets in our Solar System.


The inner structure of Neptune resembles that of its neighbor, Uranus. The interior is made up of water, ammonia, and possibly a molten rock. The atmosphere covers about 10 percent of the planet’s surface and extends towards its center. The atmosphere is primarily composed of hydrogen, with helium at higher levels. The atmosphere blends with the superheated liquid interior at a deep level. Its atmosphere has a pressure many millions of times greater than that of Earth.

Scientists have discovered that the planet’s atmosphere is divided into two main regions – the lower troposphere and the stratosphere. Both are subdued and increase in temperature as they rise in altitude. The surface of Neptune’s thermosphere is characterized by a band of high-altitude clouds, which cast shadows on the lower cloud deck. However, these bands are small and may not be a direct reflection of the planet’s temperature.

In 1846, scientists discovered Neptune. They were conducting calculations for the orbit of Uranus and realized that its gravity was being affected by a planet in the solar system. Neptune cannot be seen by the naked eye, but researchers were able to confirm the planet’s existence using a telescope. Prior to this discovery, astronomers had already detected Neptune through telescopes in the 1612, but had not yet recognized it as a planet.


Although Earth is the largest planet in the universe, it is not the heaviest. The Sun and its moon Jupiter are larger than Earth, and Jupiter is ten times bigger than Earth. This is the largest size a planet can be without becoming a gas giant. If Earth is the largest planet in the universe, why isn’t Jupiter the largest? It could be due to its mass, but it would make no sense since we are far from the Sun.

While Earth is the biggest planet in the universe, it is not the only one. Scientists are studying Earth with a full battery of modern instrumentation. As a result, they know more about its internal structure and cooling mechanisms. They have also learned about the separation of lighter elements from heavier ones, which released extra energy for geological processes. And they now know how much water covers the Earth’s crust. This information has greatly aided our understanding of the formation of our world.


Venus has the thickest atmosphere of the terrestrial planets, consisting of 96% carbon dioxide and 3.5 percent molecular nitrogen. Because Venus is so hot, its temperature can easily exceed 880 degrees Fahrenheit (about 260 degrees C), which melts lead. The surface pressure on Venus is 90 times that on Earth, which means that even the shortest day is hot. Venus is also tilted three degrees, so that it’s less inclined than Earth.

Like Earth, Venus is a rocky body similar to Earth in size and mass. It has a similar gravity and chemistry to Earth, making it often referred to as Earth’s twin. Unlike Earth, however, Venus’ surface is quite different from our own. Its rocky interior is composed mostly of a rocky mantle containing 96.5% carbon dioxide. Venus’ crust is six to twelve miles thick, whereas Earth’s is about four.

Although Venus is the biggest planet in the universe, its rotation is remarkably slow, and one day on Venus lasts 243 Earth days. That means one Venusian year lasts 225 Earth days. In addition, the day on Venus is longer than Earth’s, meaning that one Venus day lasts nearly two years! Venus’s orbit has the least eccentricity of any planet, with a deviating circle of one part in 150. This means that Venus’s distances at perihelion and aphelion rarely differ from each other. Venus also rotates slowly enough to avoid the formation of a magnetic field similar to Earth.

Earth’s magnetosphere

Earth’s magnetic field is balancing incoming solar winds with the magnetic force of Earth’s magnetosphere. The Earth’s magnetopause crosses the equatorial plane at 10 R E local noon, while at 20 R E it crosses at dawn and dusk. The Earth’s magnetosphere also has a magnetic tail extending into the opposite direction, called the geomagnetic tail.

A typical magnetosphere is similar to a bubble enclosing Earth. It is made up of two uneven bubbles that separate at the poles. On the daytime side, solar winds compress the magnetosphere, while at night it looks like a teardrop. The Earth’s poles act like a funnel for magnetic field lines, allowing high-energy particles from the sun to race towards Earth. This process is responsible for aurora borealis and other natural phenomena that take place during the night sky.

The internal field of the Earth is generated by the circulation of liquid metal in the core. This internal heat source causes the Earth’s magnetic field to be oriented at ten degrees off its rotation axis. This phenomenon is called geodynamo. And scientists have been studying the Earth for decades. The result is a more detailed knowledge of the planet’s internal structure and cooling mechanisms. This knowledge has also led to changes in the composition of the crustal layer.


Though Mercury is the biggest planet in the solar system, it doesn’t have a full atmosphere like Earth does. Instead, the tiny planet has a thin layer of “exosphere” formed by solar wind and meteoroid strikes. These powerful tornadoes channel fast solar wind plasma down to Mercury’s surface. Mercury doesn’t have an atmosphere, so it’s pockmarked with craters. The planet looks like a small moon of Earth, but if it had moons, it would probably be too close to the sun. If it had moons, they would have been sucked away into space by the solar wind’s gravitational pull.

The temperature on Mercury is extreme. During the day, temperatures reach upwards of 800 degrees Fahrenheit. At night, Mercury’s surface temperatures drop to as low as minus 290 degrees Fahrenheit. It may have ice at its poles and permanent shadows. These temperatures would be cold enough to preserve the ice. It’s an interesting fact about Mercury, which may be the smallest planet in our solar system.

The motion of Mercury around the Sun is very different from that of other planets. Mercury’s orbit is highly eccentric, tilting the Earth by 7deg. This makes the planet appear as a small black dot passing directly between Earth and Sun. Mercury has about 12 such transits every century, and the next one will happen in 2019.