Planets in our solar system order

05.04.2021 By Nagrel

People of a certain age will instinctively respond "Nine! That the Earth is one of nine planets orbiting the sun at vast distances from the sun and each other was a fact taught to students worldwide, often as early as elementary school.

If you didn't know much else about the solar system, you were still bound to know how many planets there are. Especially curious students endeavored to learn the names of these planets, too, and some details about each.

planets in our solar system order

One helpful thing is that when people learn the names of the planets, they usually learn them in order from innermost to outermost, that is, in order of increasing distance from the sun. If you have a hard time recalling the names of the planets in order with no other context, a memorization device called a mnemonic, which often evokes unrelated humorous images to add flavor to the topic at hand, can come in very handy.

Many clever planetary mnemonics are already in circulation, but that shouldn't keep you from inventing your own clever mnemonic for planets. Some people can simply memorize this one-line poem of sorts and be done with the exercise, and they do not require a special trick for keeping the solar system order straight in their minds.

Others can benefit either from an acronym for planets or from a sentence consisting of eight words whose first letters are the same of the first letters of the planets in order from Mercury to Neptune. Before this is explored, a basic treatment of the solar system as a whole is instructive.

The solar system includes the sun the ancient Roman called the sun "Sol" and everything that orbits, or revolves around, the sun owing to the force of the sun's gravitational field. These objects include planets, moons, asteroids, meteors, comets and meteoroids, in generally descending order of size. The innermost four planets Mercury, Venus, Earth and Mars are known as the terrestrial planets because they are made chiefly of rock.

Between Mars and Jupiter lies the asteroid belt, a well-clustered ring of orbiting material that includes someso-called minor planets. The remaining four for now! The solar system's accepted outer boundary is about 9 billion miles from the sun. The Earth is about 93 million miles from the sun, meaning that the outer reaches of the solar system are almost times as far from the sun as the Earth is. Since light travels at aboutmiles per secondmiles per second to be exactlight from the sun takes over 13 hours to reach the outer limits of the solar system.

But if 9 billion miles sounds like a great distance, bear in mind that light from the sun takes over four years to reach the next-nearest star. M ercury Greek god name Hermes was the messenger god. That the innermost planet was named after a god that had to be swift on foot is no accident, because from the vantage point of Earth, Mercury, with its small orbit 43 million miles from the sun and consequently short year 88 daysappears to zip back and forth across the sky with great speed compared to the other four visible planets.

Can you guess what those are based on information already provided? Mercury is only a little larger than the Moon, about one-third Earth's diameter.

V enus Aphrodite is the hottest planet despite being considerably farther from the sun than Mercury, orbiting the sun at a distance of 67 million miles. It is the nearest planet to Earth and is the brightest in the sky, in part because of its closeness but also because its methane-rich, dense atmosphere traps heat superbly.

It is slightly smaller than Earth, but the conditions on its surface are radically different. E arth, which you are likely to remember on your own, is included here for completeness. It orbits the sun at an average distance of 93 million miles. It is a sheer accident of astronomical geometry that the disk of the sun and the disk of the moon appear to be almost exactly the same size in the Earth sky. M ars Ares is often called "the Red Planet" for the color that easily distinguishes it from the rest of the planetary herd.

At almost million miles from the sun, Mars takes nearly two Earth years to orbit the sun. It is believed to have once held significant amounts of water, a precondition for life, and has been the subject of intense exploration by probes as well as the center of lots of science-fiction tales. J upiter Zeus is the first of the gas giants and by far the largest object in the solar system besides the sun itself, weighing twice as much as the other planets combined.

As of mid, 79 moons had been confirmed orbiting the planet famed for the Bright Red Spot in its southern hemisphere.Ever since the discovery of Pluto inkids grew up learning that the solar system has nine planets.

That all changed in the late s, when astronomers started arguing about whether Pluto was indeed a planet. In a highly controversial decisionthe International Astronomical Union ultimately decided in to designate Pluto as a "dwarf planet," reducing the list of the solar system's true planets to just eight.

Astronomers, however, are still hunting for another possible planet in our solar system, a true ninth planetafter mathematical evidence of its existence was revealed on Jan. The alleged "Planet Nine," also called "Planet X," is believed to be about 10 times the mass of Earth and 5, times the mass of Pluto. The order of the planets in the solar systemstarting nearest the sun and working outward is the following: MercuryVenusEarthMarsJupiterSaturnUranusNeptune and then the possible Planet Nine.

If you insist on including Plutoit would come after Neptune on the list. Pluto is truly way out there, and on a wildly tilted, elliptical orbit two of the several reasons it was demoted. The inner four planets closest to the sun — Mercury, Venus, Earth and Mars — are often called the " terrestrial planets " because their surfaces are rocky. Pluto also has a rocky, albeit frozen, surface but has never been grouped with the four terrestrials.

If the Moon were replaced with some of our planets

The four large outer worlds — Jupiter, Saturn, Uranus and Neptune — are sometimes called the Jovian or "Jupiter-like" planets because of their enormous size relative to the terrestrial planets. They're also mostly made of gases like hydrogen, helium and ammonia rather than of rocky surfaces, although astronomers believe some or all of them may have solid cores.

Jupiter and Saturn are sometimes called the gas giants, whereas the more distant Uranus and Neptune have been nicknamed the ice giants. This is because Uranus and Neptune have more atmospheric water and other ice-forming molecules, such as methane, hydrogen sulfide and phosphene, that crystallize into clouds in the planets' frigid conditions, according to the Planetary Society. For perspective, methane crystallizes at minus Fahrenheit minus degrees Celsiusaccording to the U.

National Library of Medicine. The IAU defines a true planet as a body that circles the sun without being some other object's satellite; is large enough to be rounded by its own gravity but not so big that it begins to undergo nuclear fusion, like a star ; and has "cleared its neighborhood" of most other orbiting bodies. Yeah, it's a mouthful. But that restrictive definition helped isolate what should and should not be considered a planet — a problem that arose as astronomers discovered more and more planet-like objects in the solar system.

Pluto was among the bodies that didn't make the cut and was re-classified as a dwarf planet. The problem with Pluto, aside from its small size and offbeat orbit, is that it doesn't clear its neighborhood of debris — it shares its space with lots of other objects in the Kuiper Belt. Still, the demotion of Pluto remains controversial. The IAU planet definition also put other small, round worlds into the dwarf planet category, including the Kuiper Belt objects ErisHaumea and Makemake.

Ceresa round object in the Asteroid Belt between Mars and Jupiter, also got the boot. Ceres was considered a planet when it was discovered inbut it was later deemed to be an asteroid. That still didn't quite fit because it was so much larger and rounder than the other asteroids. Astronomers instead deemed it a dwarf planet inalthough some astronomers like to consider Ceres as a 10th planet not to be confused with Nibiru or Planet X. Below is a brief overview of the eight true planets in our solar systemmoving from that closest to the sun to farthest from the sun:.

planets in our solar system order

Zipping around the sun in only 88 days, Mercury is the closest planet to the sun, and it's also the smallest, only a little bit larger than Earth's moon. Meanwhile on the night side, temperatures drop to minus F minus C.

Mercury has a very thin atmosphere of oxygen, sodium, hydrogen, helium and potassium and can't break-up incoming meteors, so its surface is pockmarked with craters, just like the moon.

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Among those findings was the discovery of water ice and frozen organic compounds at Mercury's north pole and that volcanism played a major role in shaping the planet's surface. The second planet from the sun, Venus is Earth's twin in size. Radar images beneath its atmosphere reveal that its surface has various mountains and volcanoes. But beyond that, the two planets couldn't be more different. Because of its thick, toxic atmosphere that's made of sulfuric acid clouds, Venus is an extreme example of the greenhouse effect.

It's scorching-hot, even hotter than Mercury.Planets are listed in order of distance from the Sun. Planets here are in very elongated orbits that go from the Kuiper Belt out to the inner edge of the Oort Cloud.

Several dwarf planets out there are believed to be perturbed by Planet 9, thought to be a mini-Neptune planet at 10X Earth mass. It's existence is highly probable but not yet confirmed. The 8 major planets and dwarf Ceres are located in the solar system proper. Pluto and all the other dwarf planets except Ceres and Sedna are located in the Kuiper Belt.

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Sedna is located in the Oort Cloud. Planet Mercury 0 moons. Planet Venus 0 moons. Planet Earth 1 moon. Planet Mars 2 moons. Planet Jupiter 79 moons. Planet Saturn 82 moons. Planet Uranus 27 moons. Planet Neptune 14 moons. Planet Hygiea Dwarf 0 moons. Planet Orcus Dwarf 1 moon. Planet Ixion Dwarf 0 moons. Planet MS 4 Dwarf 0 moons. Planet Salacia Dwarf 1 moon.

Planets in Order from the Sun

Planet Haumea Dwarf 2 moons. Planet Quaoar Dwarf 1 moon. Planet Makemake Dwarf 1 moon. Planet FZ 27 Dwarf 0 moons. Planet Gonggong Dwarf 1 moon.

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Planet Eris Dwarf 1 moon. Planet UZ Dwarf 0 moons. Planet RR Dwarf 0 moons. Planet Varda Dwarf 1 moon. Planet VP Dwarf 0 moons. Planet Sedna Dwarf 0 moons. Planet "Caju" Dwarf 0 moons.

The Planets In Order

Planet "Farout" Dwarf 0 moons. Planet 9?In our Solar System, there are eight planets. The planets of our Solar System are listed based on their distance from the Sun. There are, of course, the dwarf planets CeresPlutoHaumeaMakemakeand Eris; however, they are in a different class. Among the dwarf planetsPluto was listed as a planet the longest. This all changed in when the Astronomical Union — IAU — finally decided on the definition of a planet.

According to the definition, a planet is a celestial body that is in orbit around the Sun, has enough mass to assume hydrostatic equilibrium — resulting in a round shape, and has cleared the neighborhood around its orbit. Many still consider Pluto as a planet to this day.

Though we must sadly disconsider Pluto, here are some quick facts about each planet of the Solar System. Mercury is the closest planet to the Sun. Mercury is, however, the smallest planet out of the eight. Being a terrestrial planet, Mercury has a high density, and it is primarily composed out of rock and iron ore.

Mercury orbits the Sun once every Surface temperatures range from — to degrees Celsius.

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The small planet has a diameter of 4. The second closest planet to the Sun. It is the hottest planet of the Solar system since its atmosphere keeps the temperatures almost consistently the same. The temperatures are around degrees Celsius — about four and a half times the amount of heat needed to evaporate water.

Its diameter has been measured to be at One day on Venus is equivalent to Earth days; thus, a day on Venus is longer than a year. Its atmosphere is very thick, composed mainly out of carbon dioxide, nitrogen, and clouds of sulfuric acid. The third closest planet to the Sun.

Our 8 Planets & 18 Dwarf Planets

It only has one moon and several other smaller satellites.These spacecraft are flying in different areas of our neighborhood on a quest to understand solar phenomena such as the extreme heat of the sun's outer atmosphere, the distribution of dust in our solar system or the production of the solar wind — the constant stream of particles coming from our sun. This joint mission with ESA will eventually leave the plane of the solar system to study the sun's poles.

The spacecraft first transmitted test images in Julyabout five months after its launch. On Nov. From left to right, you can see Venus which appears exceedingly bright as the sun bounces off the planet's cloudsUranus, Earth and Mars. The sun is just out of the image view on the right-hand side of the frame. Plot twist! Solar Orbiter was roughly A single AU is roughly 93 million miles million km.

Our ParkerSolarProbe spacecraft saw six of the planets on June 7,as it wheeled around the Sun during its fifth close solar flyby. NASA's Parker Solar Probe will fly closer to the sun than any other spacecraft to date as it tries to capture the "origin story" of the solar wind.

In this incredible wide-field image of June 7, days before a close approach to the sunit imaged six of our solar system's planets. The spacecraft was roughly one AU from Earth at imaging time, at The single operational STEREO spacecraft — one of a pair that circled the sun behind and ahead of Earth in our planet's approximate orbit starting in — also gazed at the planets on June 7, In this image you can see the same six planets as Parker on the same date, but from a different vantage point in the solar system.

The dark columns in the image are due to the detector being saturated, which is a combination of the long exposure time with the relative brightness of the planets compared to the background stars, according to NASA.

STEREO's normal mission is to study the sun's outer atmosphereor corona, along with the solar wind, to improve solar weather predictions. Follow Elizabeth Howell on Twitter howellspace. Follow us on Twitter Spacedotcom and on Facebook. Join our Space Forums to keep talking space on the latest missions, night sky and more! And if you have a news tip, correction or comment, let us know at: community space.

planets in our solar system order

Please deactivate your ad blocker in order to see our subscription offer.Can you name the planets in order from the Sun? If not, then all you need to do is go through the following article and learn all about the planets of the Solar System.

We inhabit the planet Earth, the only planet in the solar system that is known to be able to sustain life. There are many more planets and their moons that make up this unique solar system. It is assumed by astronomers that the solar system is over 4 billion years old.

There are 8 planets in order from the Sun that make up the solar system. Let us have a look at these planets and learn more about our solar system in short from the following paragraphs. There are 5 dwarf planets in the solar system. Pluto was once considered one of the planets from the Sun, but is now considered to be a dwarf planet. Thus, from a total of 9 planets in the solar system, there are now only 8 planets. The planets are divided into three different categories based on their composition.

Let us have a look at the planets in order from the Sun outwards according to the categories they are placed in. The third category not covered below consists of the dwarf planets Ceres, Haumea, Makemake and Eris. Would you like to write for us? Well, we're looking for good writers who want to spread the word.

Get in touch with us and we'll talk The four inner most planets in the solar system in order from the Sun are called terrestrial planet. They are called so as they have a rocky, compact surface. Let us have a look at the different planets below:. Mercury is the hottest, driest planet in the solar system.

It is also the first planet from the Sun as well as the smallest planet among all. Mercury orbits the Sun in about The planet is named after the Roman messenger God, Mercury. The second planet in order from the Sun is Venus.

Solar System Planets: Order of the 8 (or 9) Planets

It is covered with a cloud of poisonous gases like sulfuric acid. The atmosphere of Venus is the densest of all planets and consist of carbon dioxide.A planetary mnemonic refers to a phrase used to remember the planets and dwarf planets of the Solar Systemwith the order of words corresponding to increasing sidereal periods of the bodies.

One simple visual mnemonic is to hold out both hands side-by-side with fingers spread and thumbs in the same direction, with the fingers of one hand representing the terrestrial planetsand the other hand the gas giants.

The first thumb represents the Sun and asteroid beltincluding Ceresand the second thumb represents the asteroid belt and trans-Neptunian objectsincluding Pluto. The structure of this sentence suggests that it may have originated before Pluto's discovery, and can easily be trimmed back to reflect Pluto's demotion to dwarf planet. However, many of these mnemonics were made obsolete in according to the IAU and those recognising the legitimacy of their definition of planetwhich reclassified Pluto as well as Ceres and Eris as a dwarf planet.

When Pluto was demoted to a dwarf planet, mnemonics could no longer include the final "P". One that may be both simplest and most easily recalled, as it incorporates the thoughts of a young child attempting to memorize the planetary order: "My Very Earliest Memory: Just SUN.

Since the National Geographic competition, two additional bodies were designated as dwarf planets, Makemake and Haumeaon July 11 and September 17, respectively. Longer mnemonics will be required in the future, if more of the possible dwarf planets are recognized as such by the IAU. However, at some point enthusiasm for new mnemonics will wane as the number of dwarf planets exceeds the number that people will want to learn it is estimated that there may be up to dwarf planets [ citation needed ].

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