Facts about the nine planets in our solar system
The sun has such powerful gravity it tries to pull the planets towards it. The planets of the solar system as depicted by a NASA computer illustration. Mercury is the closest planet to the Sun.
Talk about a lazy planet. Uranus has the second most complex set of rings in our solar system Saturn has the most defined rings. Neptune was discovered in In it finally made it's first lap around the sun since we discovered it -- because one Neptune year lasts Earth years!
Like Jupiter, Neptune has a dark spot caused by a storm. Neptune's spot is smaller than Jupiter's -- it is only about the size of the planet earth. It jumped ahead of Neptune on September 5, and remained there until February, when it went back to being the farthest. Pluto is no longer considered a planet -- instead, astronomers call it a dwarf planet or planetoid.
Whatever the name, our solar system isn't the neat model we once thought it was. It takes a bit for grown-ups like me!
It took lots of cool photos of Pluto and its moons and sent them back to us on Earth. Then it continued off into space -- who knows where it will end up! To me, Pluto just keeps getting more awesome despite it losing its place as one of our planets when I was young, it was my favorite.
I love that thanks to projects like New Horizons, we now know that Pluto has a cute little heart shaped area on it. Pluto has a heart! In Januaryastronomers in the United States discovered a new body orbiting the sun in our solar system. Its swirling clouds are colorful due to different types of trace gases.
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A big feature is the Great Red Spot, a giant storm which has raged for hundreds of years. Jupiter has a strong magnetic field, and with dozens of moons, it looks a bit like a miniature solar system. The sixth planet from the sun is known most for its rings.
When Galileo Galilei first studied Saturn in the early s, he thought it was an object with three parts. Not knowing he was seeing a planet with rings, the stumped astronomer entered a small drawing — a symbol with one large circle and two smaller ones — in his notebook, as a noun in a sentence describing his discovery.
Jupiter, Saturn, Uranus and Neptune. With the exception of Neptune and Uranus
More than 40 years later, Christiaan Huygens proposed that they were rings. The rings are made of ice and rock. Scientists are not yet sure how they formed. The gaseous planet is mostly hydrogen and helium. It has numerous moons. The seventh planet from the sun, Uranus is an oddball. Astronomers think the planet collided with some other planet-size object long ago, causing the tilt.
The tilt causes extreme seasons that last plus years, and the sun beats down on one pole or the other for 84 Earth-years. Uranus is about the same size as Neptune.
Methane in the atmosphere gives Uranus its blue-green tint. It has numerous moons and faint rings. The eighth planet from the sun, Neptune is known for strong winds — sometimes faster than the speed of sound.
Neptune is far out and cold. The planet is more than 30 times as far from the sun as Earth. It has a rocky core.
Neptune was the first planet to be predicted to exist by using math, before it was detected. Irregularities in the orbit of Uranus led French astronomer Alexis Bouvard to suggest some other might be exerting a gravitational tug. At that point the Sun would stop, briefly reverse course, and stop again before resuming its path toward the horizon and decreasing in apparent size.
All the while the stars would be moving three times faster across the sky. Observers at other points on Mercury's surface would see different but equally bizarre motions.
Temperature variations on Mercury are the most extreme in the solar system ranging from 90 K to K.
Solar System Planets: Order of the 8 (or 9) Planets
The temperature on Venus is slightly hotter but very stable. Mercury craters Mercury is in many ways similar to the Moon: On the other hand, Mercury is much denser than the Moon 5.
Mercury is the second densest major body in the solar system, after Earth. Actually Earth's density is due in part to gravitational compression; if not for this, Mercury would be denser than Earth. This indicates that Mercury's dense iron core is relatively larger than Earth's, probably comprising the majority of the planet.
There are 8 planets in our solar system, they are Mercury, Venus, Earth, Mars,
Mercury therefore has only a relatively thin silicate mantle and crust. Mercury's interior is dominated by a large iron core whose radius is to km. The silicate outer shell analogous to Earth's mantle and crust is only to km thick. At least some of the core is probably molten. Modeling by Hao Cao, a UCLA postdoctoral scholar working in the lab of Christopher Russell after considering many factors, including how fast Mercury rotates and the chemistry and complex motion of fluid inside the planet show the magnetic field of Mercury works differently than it does on Earth.
Inside Earth's core, iron turns from a liquid to a solid at the inner boundary of the planet's liquid outer core and the solid inner core is growing, and this growth provides the energy that generates Earth's magnetic field. There are actually five dwarf planets in our solar system; one of them is the recently reclassified Pluto.
The other four are Ceres, Eris, Haumea, and Makemake.
While we have all seen many movies that feature asteroids, some may not realize that our solar system contains both a major asteroid belt located between Jupiter and Mars, as well as smaller asteroids grouped throughout the solar system—some of them fairly close to Earth. But the movies were wrong on some crucial details: If asked what the hottest planet is, most people would point to Mercury. While this is not true, it is a completely sensible conclusion since Mercury is, after all, the closest planet to the sun.
But it turns out that Venus is actually a hotter planet than Mercury, even though it is further away. Venus, on the other hand, has a notoriously thick atmosphere that traps the heat created by the sun.
Interestingly, Venus is also quite the black sheep of the planet world, and spins in the opposite direction. Many people were shocked when the scientific community announced that Pluto was no longer considered to be a planet.
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