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planet
Table of Contents
References & Edit History Related Topics
Images & Videos
solar system to scale
Why isn't Pluto a planet?
Learn about the dwarf planets within our solar system
Explore exoplanets and the techniques used to detect them
effects of gravity on the Moon and Earth
Know the ten interesting facts that prove the earth is round
For Students
planet summary
Quizzes
Model of a molecule. Atom, Biology, Molecular Structure, Science, Science and Technology. Homepage 2010 arts and entertainment, history and society
Science Quiz
The orbits of the planets and other elements of the solar system, including asteroids, Kuiper belt, Oort cloud, comet
Space Odyssey
Saturn. Saturn and its rings. Second largest planet of the solar system. Space Art
Planets and the Earth’s Moon
1 July 2002: The Solar and Heliospheric Observatory (SOHO) satellite reveals a massive solar eruption more than 30 times the Earth's diameter. The eruption formed when a loop of a magnetic field over the surface of the Sun trapped hot gas.
Brightest Star in the Solar System
Nicolaus Copernicus. Nicolas Copernicus (1473-1543) Polish astronomer. In 1543 he published, forward proof of a Heliocentric (sun centered) universe. Coloured stipple engraving published London 1802. De revolutionibus orbium coelestium libri vi.
All About Astronomy
Related Questions
Read Next
This close-up image of a dust storm on Mars was acquired by the Mars Color Imager instrument on NASA Mars Reconnaissance Orbiter on Nov. 7, 2007. This image is centered on Utopia Planitia
Do Hurricanes Happen on Other Planets?
Remarkable new details of Pluto's largest moon Charon are revealed in this image from New Horizons' Long Range Reconnaissance Imager (LORRI), taken late on July 13, 2015 from a distance of 289,000 miles
Why Is Pluto No Longer a Planet?
Solar System with the sun and planets amid stars. Illustration Venus Mercury Earth Mars Jupiter Saturn Neptune Uranus space orbit
Understanding Kepler’s Laws of Planetary Motion
Solar system illustration. (planets; sun)
Why Are Planets Round?
Background: abstract bubble planets with clouds. astrology, astronomy, atomosphere, big bang, bubbles, fantasy, future, galaxy, universe, stars
9 Ghostly Planets
Discover
The Lost Colony of Roanoke, North Carolina, where 115 people mysteriously disappeared c. 1590. John White discovers the word Croatoan carved onto a tree upon his return to the deserted Roanoke Colony in 1590
The Lost Colony of Roanoke
Horses. Equus caballus. Horse stable. A brown horse looks out from his stall through the window.
Horsing Around: 7 of the Weirdest Racehorse Names in History
Shah Jahan. Taj Mahal. Mughal architecture. Emperor Shah Jahan fifth Mughal Emperor (reigned 1628-1658) India, Himachal Pradesh, Basohli or Jammu and Kashmir, Mankot, circa 1690 Drawings; Opaque watercolor, gold, and ink on paper (see notes)
6 Important Mughal Emperors
Remarkable new details of Pluto's largest moon Charon are revealed in this image from New Horizons' Long Range Reconnaissance Imager (LORRI), taken late on July 13, 2015 from a distance of 289,000 miles
Why Is Pluto No Longer a Planet?
January 21, 2019: Superbowl LIII will be played at Atlanta's Mercedes-Benz Stadium on Sunday, February 3, 2019 against the New England Patriots and the Los Angeles Rams.
What Was the Super Bowl’s First Blockbuster Commercial?
King Cobra snake in Malaysia. (reptile)
9 of the World’s Deadliest Snakes
Dr. Maria Telkes, September 4, 1956.
10 Women Scientists Who Should Be Famous (or More Famous)

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Videos

Why isn't Pluto a planet?
Being a dwarf planet isn't really a downgrade.
Video: Encyclopedia Britannica INC.
Learn about the dwarf planets within our solar system
Learn about dwarf planets.
Video: JPL/NASA
Explore exoplanets and the techniques used to detect them
Learn about extrasolar planets (exoplanets) and the techniques used to detect them.
Video: © Massachusetts Institute of Technology (A Britannica Publishing Partner)
Know the ten interesting facts that prove the earth is round
Ten reasons why Earth is round.
Video: © MinutePhysics (A Britannica Publishing Partner)

Images

solar system to scale
The eight planets of the solar system and Pluto, in a montage of images scaled to...
NASA/Lunar and Planetary Laboratory
effects of gravity on the Moon and Earth
Effects of gravity on Earth and the Moon.
Encyclopædia Britannica, Inc.
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