The solar system (article) | Earth in space | Khan Academy (2024)

Review your understanding of the solar system in this free article aligned to NGSS standards.

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  • Cole Man

    2 years agoPosted 2 years ago. Direct link to Cole Man's post “Why are all of the bigges...”

    Why are all of the biggest planets made up of gas and liquid?

    (54 votes)

    • QWERTYUIOP

      a year agoPosted a year ago. Direct link to QWERTYUIOP's post “It is probably because th...”

      The solar system (article) | Earth in space | Khan Academy (4)

      The solar system (article) | Earth in space | Khan Academy (5)

      It is probably because the gas and liquid substances weren't able to be combined to create a planet nearby the sun, so they eventually moved outwards and became the gas giants we know.

      (43 votes)

  • Nate The Great

    2 years agoPosted 2 years ago. Direct link to Nate The Great's post “Which is the biggest plan...”

    Which is the biggest planet?

    (7 votes)

    • Johanna

      2 years agoPosted 2 years ago. Direct link to Johanna's post “The biggest planet in our...”

      The solar system (article) | Earth in space | Khan Academy (9)

      The solar system (article) | Earth in space | Khan Academy (10)

      The biggest planet in our solar system is Jupiter. UniverseToday.com gives these measurements: “Jupiter (69,911 km / 43,441 miles) – 1,120% the size of Earth”.

      I hope this helps! :)

      (48 votes)

  • AlenP

    2 years agoPosted 2 years ago. Direct link to AlenP's post “Jupiter (69,911 km / 43,4...”

    Jupiter (69,911 km / 43,441 miles) – 1,120% the size of Earth”.

    (13 votes)

    • Tmoneyy :)

      2 years agoPosted 2 years ago. Direct link to Tmoneyy :)'s post “very helpful thanks let m...”

      The solar system (article) | Earth in space | Khan Academy (14)

      very helpful thanks let me add on Jupiter Is Massive: ...
      Jupiter Cannot Become A Star: ...
      Jupiter Is The Fastest Spinning Planet In The Solar System: ...
      The Clouds On Jupiter Are Only 50 km Thick: ...
      The Great Red Spot Has Been Around For A Long Time: ...
      Jupiter Has Rings: ...
      Jupiter's Magnetic Field Is 14 Times Stronger Than Earth's: ...
      Jupiter Has 67 Moons:

      (17 votes)

  • ericha213

    2 years agoPosted 2 years ago. Direct link to ericha213's post “I wonder who discoverd th...”

    I wonder who discoverd the solar system

    (10 votes)

    • Johanna

      2 years agoPosted 2 years ago. Direct link to Johanna's post “As Alex said, humans have...”

      The solar system (article) | Earth in space | Khan Academy (18)

      As Alex said, humans have known some things about the solar system since they started looking up. Copernicus popularized the fact that it’s a solar system, though: that the planets go around the sun instead of everything going around the earth.

      Does that help?

      (22 votes)

  • aarg6119

    a year agoPosted a year ago. Direct link to aarg6119's post “how are comets formed?”

    how are comets formed?

    (10 votes)

    • Zentua :3

      a year agoPosted a year ago. Direct link to Zentua :3's post “According to NASA, "Comet...”

      The solar system (article) | Earth in space | Khan Academy (22)

      According to NASA, "Comets are frozen leftovers from the formation of the solar system composed of dust, rock, and ices."

      (15 votes)

  • Dakota Jordan White

    a year agoPosted a year ago. Direct link to Dakota Jordan White's post “why does the comets have ...”

    why does the comets have tails?

    (10 votes)

    • QWERTYUIOP

      a year agoPosted a year ago. Direct link to QWERTYUIOP's post “It's simply because it is...”

      The solar system (article) | Earth in space | Khan Academy (26)

      It's simply because it is the comet's particles being burnt as it moves near the sun.

      (13 votes)

  • Melanie

    2 years agoPosted 2 years ago. Direct link to Melanie's post “and guys how do we have a...”

    and guys how do we have a solar eclipse if the moon is smaller than the earth it's super tiny in comparison to the sun someone explain?

    (6 votes)

    • Mark

      2 years agoPosted 2 years ago. Direct link to Mark's post “The moon is closer than t...”

      The solar system (article) | Earth in space | Khan Academy (30)

      The moon is closer than the sun. You can also block the sun with your hand. Clearly, the sun is larger than your hand but it can still block the sun because your hand (like the moon) is much closer to your eyes than the sun is.

      (13 votes)

  • edmonlul000

    2 years agoPosted 2 years ago. Direct link to edmonlul000's post “How did the Solar system ...”

    How did the Solar system originate?

    (6 votes)

    • jessi.wermager

      a year agoPosted a year ago. Direct link to jessi.wermager's post “gravity pulled a cloud of...”

      The solar system (article) | Earth in space | Khan Academy (34)

      gravity pulled a cloud of gas so hared it became the sun and then the gravity from the sun made the solar system we now today🌌🪐🌍🌑🌞

      (11 votes)

  • GGatorZ21

    2 years agoPosted 2 years ago. Direct link to GGatorZ21's post “How *fast* can a Comet tr...”

    How fast can a Comet travel?

    (8 votes)

    • SomeRandomStarky

      2 years agoPosted 2 years ago. Direct link to SomeRandomStarky's post “A comet's top speed is 17...”

      A comet's top speed is 17,500 miles per hour, which in kilometers is 2816 kilometers per hour

      (6 votes)

  • hailey.fries

    9 months agoPosted 9 months ago. Direct link to hailey.fries's post “If one of Jupiter's moons...”

    If one of Jupiter's moons has more mass than mercury why is it still considered a moon?

    (6 votes)

    • Ohioman11231

      9 months agoPosted 9 months ago. Direct link to Ohioman11231's post “Because the moon was capt...”

      Because the moon was captured by Jupiter and is orbiting around it so it is considered a moon.

      (8 votes)

The solar system (article) | Earth in space | Khan Academy (2024)

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