The Planet Neptune – Planets In Our Solar System

Planet Neptune

Planet Neptune - Planets In Our Solar SystemThe Planet Neptune is in the eighth positioned planet from the Sun. This planet is faster than the sound speed and is renowned for strong winds. Neptune is far out and really cold. This planet is far from the sun to over 30 times as the earth. It features a rocky core. This was the first planet forecasted as existed using math, even before it was discovered. Neptune is 17 times massive as Earth.

  • Orbit: 165 earth years
  • Diameter: 30,775 miles (49,530 km)
  • Day: 19 earth hours

Neptune, the eighth planet was predicted on Sept 23, 1846, even prior to seeing it through a telescope. Galileo, the previous astronomer mistook this planet to be a star owing to its slow motion. Neptune acquired the name as the Roman god of the sea. However, Johann Galle based on calculations spotted Neptune through a telescope.

Neptune has a blue tint owing to an unidentified compound and absorption of methane red light in the planets due to the hydrogen-helium atmosphere.  Neptune is dubbed often as ice giant as it possesses a slushy mix of thick water, methane ices and ammonia in its atmosphere and is 17 times earth’s mass and the volume is nearly 58 times as per NASA. The rocky core of Neptune is equal to Earths mass.

Neptune winds reach 1500 mph and are detected to be the fastest in the solar system. It receives sunlight to maintain warmth though it is at the farthest distance from the sun. This oval shaped ‘Great Dark Spot’ spinning counterclockwise was huge to contain entire earth and moves nearly 750mph westward.

Magnetic poles of the planet Neptune are tipped more than 47 degrees in comparison to others that spins together. As such, the magnetic field of this planet is nearly 27 times powerful than the earth’s and with each rotation it undergoes wild swings. Considering the cloud formations, scientists calculated that it takes less than 16 hours to complete a day.

Neptune’s oval-shaped orbit is at a distance of (4.5 billion kilometres) 2.8 billion miles, from the sun. It is 30 times roughly away from the Earth such that it cannot be seen through the naked eye. Neptune goes roughly every 165 earth years around the sun.

Every 248 years, Pluto appears to move closer to the sun and this is because it moves inside the orbit of Neptune for 20 years. Nevertheless, Neptune is the farthest planet and Pluto was considered as a dwarf planet.

Planets In Our Solar System

Planets In Our Solar System

Planets In Our Solar System - (Planets In Our Solar System)Planets in Our Solar System, A solar system is essentially a star and the objects that orbit around it. Our solar system consists of the Sun in the centre around which eight planets, a dwarf planet and some asteroids revolve. Our solar system is in an outward portion of the Milky Way galaxy. Let’s have a look at the planets in our solar system.

The planets in our solar system were discovered after astronomers followed moving points of light among the stars. Mercury, Venus, Jupiter, Mars and Saturn were discovered in a similar manner, while Neptune, Uranus, Pluto, the Asteroid Belt and the moons of many planets were observed only after the telescope was invented. The discovery of the dwarf planet Eris led to the discovery of other dwarf planets. Several space probes were sent out in space to further explore the solar system and are being continued today.

Solar System theorised

The solar system is theorised to have originated from a giant rotating cloud of dust and gas known as the solar nebula. This nebula collapsed due to its gravity. It spun faster and was flattened to a disc. Most of the material from this nebula moved towards the centre and formed the sun. Other particles collided and stuck together to form planetesimals (objects that are the size of asteroids). Some of these planetesimals combined to form comets, asteroids, moons and planets. The solar winds were very powerful and swept away lighter elements such as helium and hydrogen from the inner planets. The solar winds were much weaker in the outer planets and hence, they are predominantly made of helium and hydrogen.

Planets in our Solar System

In the order of their distance from the Sun, the planets in our solar system are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune. In the year 2006, The International Astronomical Union classified Pluto as a dwarf planet and it is effective, not included in this list. Apart from the planets, it also includes meteorites, comets, asteroids, a disc-shaped Kuiper Belt, a spherical Ort Cloud and a heliopause that is shaped like a teardrop. The solar system is estimated to stretch for a distance of 9 billion miles.

Planet Nine

Evidence for a new planet nicknamed “Planet x / Planet 9“was unveiled in 2016 bringing the number of planets in the solar system back to nine. It is estimated to have a mass that is 5,000 times that of Pluto and 10 times that of Earth. This planet x (video) is believed to exist between Neptune and Pluto. In any case, Pluto is the farthest object in our solar system orbiting in an elliptical and completely tilted axis.

The sun lies at the centre of our solar system and is by far, the largest object in it. It contains around 99.8% of the mass in the entire solar system. It provides light and heat without which life on Earth would stop. Most of the other objects in the solar system orbit in oval-shaped paths, with the sun slightly off centre from their paths.

Kinds of Planets

The planets in our solar system are of two kinds. The first kind is Terrestrial planets or planter whose surfaces are rocky. This includes Mercury, Venus, Earth and Mars. The other four are called Jovian planters because they are huge in comparison to the terrestrial planets and more importantly, are gaseous in nature. Jupiter and Saturn are basically called gas planets while Uranus and Neptune have more ice. A common feature is that all four planets contain helium and hydrogen.

Pluto also has solid rocky surfaces. But since it has been classified as a dwarf planet, it falls out of this list. The IAU defines a planet that can circle the sun without being the satellite of any other object while being large enough so that it can be rounded (by its own gravity) and must ‘clear the neighbourhood’ of other orbiting objects. The problem with Pluto is its small size and its odd orbit when compared with the other planets in our solar system. Most importantly, Pluto’s orbit shares space with other object belonging to the Kuiper Belt that lies beyond Neptune. Other dwarf planets are Eris, Makemake, Sedna and Haumea from the Kuiper Belt and Ceres from the Asteroid Belt that lies between Jupiter and Mars.

Comets

Comets are comprised of primarily rock and ice. They follow very long orbits that bring them closer to the sun at certain points. Some short-period comets are thought to originate from the Kuiper belt and complete their orbits within 200 years. Long period comets take more than 200 years to complete their orbits and they are believed to have originated from the Oort Cloud. When comets come very close to the sun, some of the ice in their central nucleus evaporates into gas which is carried outward, giving it a characteristic ‘tail’.

The Kuiper belt is long suspected to exist beyond Neptune and is estimated to house more than a trillion comets and some hundreds of thousands of icy bodies.  Beyond this lie the Oort Cloud, Heliosphere and Heliopause.