Eight planets, one useful lineup

Start with the Sun

Let's build a paper solar system. Start with the Sun, a star that gives off light. Then place eight planet cards in order outward from it. Our row is a memory tool, not a photograph taken from a very tall ladder.

Four rocky neighbors

The first four planet names are Mercury, Venus, Earth and Mars. Say them slowly and point to each label. Earth is our home and the third planet in this ordering. The Sun does not take planet number one; it is our starting reference.

Continue past Mars

After Mars come Jupiter, Saturn, Uranus and Neptune. Now all eight cards are in order. If a card falls under the table, the solar system has not lost a planet. Find the card and use its neighbors to put it back.

Models have a purpose

Look at the evenly spaced circles. They help us read the names, but they do not show the real distances or sizes. Real planets also move around the Sun. This row does not claim that all eight are lined up like this today.

Pause: a missing planet

Try a new little piece of the lineup. Earth is on one card and Jupiter is on another, with exactly one planet card between them. Pause and name the missing planet. Then explain how you checked using the outward order rather than the colors.

Check the neighboring cards

The missing card is Mars. Read the sequence Earth, Mars, Jupiter. We used order, not size or brightness. A huge Mars label would still belong in the same place. Letter size cannot move an actual planet closer to the Sun.

The hottest is not the closest

Fun fact: Venus is hotter at its surface than Mercury, even though Mercury is closer to the Sun. Venus has a thick atmosphere that traps heat. Distance alone does not explain every planet property. A simple lineup leaves out important information about each world.

Build your own lineup

Continue to the worksheet below the video. Arrange your own paper planet cards, check the neighbors and explain one limit of the picture. You do not need to memorize every planet fact today. Start with a reliable order and a clear explanation.