Sure! Here’s a simple picture of Earth at two points in its trip around the Sun:

```text
   NORTHERN HEMISPHERE: SUMMER              NORTHERN HEMISPHERE: WINTER

          North pole ↗                            North pole ↗
                    /                                      /
              ( Earth )  ← ← ← ←       ☀       → → → →  ( Earth )
                 June                                      December
          tilted toward the Sun                    tilted away from the Sun
```

Earth is tilted, and it keeps leaning the same way as it goes around the Sun. When our part of Earth tilts **toward** the Sun, sunlight shines more directly and the days are longer—that’s **summer**. When it tilts **away**, the sunlight is less direct and the days are shorter—that’s **winter**.

It’s **not** because Earth is much closer to the Sun in summer. And when it’s summer in the Northern Hemisphere, it’s winter in the Southern Hemisphere—like in Australia.