Look at your first drawing. Perhaps you caught a thin curve. Perhaps the Moon looked round and bright. Where was the rest of it?

It was still there. The Moon makes no light of its own. The Sun lights the half facing it. From Earth, we see different amounts of that sunlit half as the Moon moves around us.

These changing views are called phases. A crescent is a thin lit curve. It is a view of a whole Moon, not a slice cut out of one.

The views form a cycle, a pattern that repeats. At new Moon, no lit part is visible. First quarter shows a half-lit view while the bright part grows. Full Moon looks round and lit. Last quarter shows a half-lit view while the bright part shrinks. The eight named phases lead back to new Moon.

Now try the clue for yourself. Can one whole ball give you different bright shapes?

Your drawing caught the Moon's shape. But its place in the sky can be another clue. Imagine looking from the same safe spot twice during an evening. Would the Moon stay above the same rooftop?

During the night, the Moon appears to travel across the sky. Much of that movement happens because Earth is turning. You turn with it, even when your feet stay in one place. Turning is called rotation. As Earth rotates, your view of the sky changes.

The Moon is moving too. It travels around Earth along a path called an orbit. That journey helps change when the Moon rises and sets from one day to the next.

So there are two movements to keep separate: Earth turns, and the Moon travels around Earth. A picture of the Moon alone can hide those clues. A rooftop or tree in your drawing can help you show where you saw it.

Imagine spotting a pale Moon in a blue sky. Has it forgotten that people usually draw it beside stars? No. The Moon can be visible during the day too.

The Moon does not switch on at night and switch off in the morning. It reflects sunlight. When it is above your horizon, the edge where sky seems to meet land, you may be able to see that reflected light.

A bright daytime sky can make the Moon harder to pick out. Its phase and its place in the sky matter too. At new Moon, the sunlit side faces away from us, so we do not see a bright Moon.

That means "I cannot see it" and "it is not there" are different ideas. It may be below the horizon, hidden by clouds, or difficult to see. If you happen to spot a daytime Moon, keep the sighting in your log. Never search toward the Sun.

The Moon's changing views form a pattern. Now imagine using that pattern to decide when a new month begins. The sky can offer a way to keep track of time.

Calendar makers in China have used the Moon's repeating cycle for centuries. In the traditional Chinese calendar, a month begins on the day of a calculated new Moon. The calendar keeps track of the year as well as lunar months, months based on the Moon's cycle.

Those patterns help set dates for celebrations. China's Lunar New Year begins a new year in this calendar. The Lantern Festival follows on day 15 of its first month, around the full-Moon part of the cycle.

New Moon and full Moon become more than names on phase cards. They help connect the sky with a calendar and with gatherings on Earth. Different calendars use different rules. This is one example, not a rule for every culture. What might your own Moon record help you plan?

solo · About 3-5 minutes per sighting; optional two-week log; estimates

You need

• Printed log
• Pencil

1. Ask an adult to choose a safe viewing spot. Look only for the Moon.
2. Write the date and time. Draw the shape you actually see.
3. If you cannot see the Moon, write "not seen." Add a reason only if you know it.
4. Try another sighting on another day. Continue for two weeks if you want to.
5. Compare your real sightings. Keep any model drawings on separate paper.

Return here after a few observations

solo · About 10-15 minutes; estimate; ask an adult for the model

You need

• Printed phase cards
• Scissors
• Pencil
• Optional: ball and lamp with an adult

1. Cut out the cards. Waxing means the visible lit part grows. Waning means it shrinks. Gibbous means more than half-lit but not full.
2. Choose a thin curve or a half-lit view. With an adult, try to make that view using your ball and lamp.
3. Use the growing and shrinking clues to arrange the cards, beginning with new Moon. First and last quarter show half-lit views.
4. After the shrinking curve, return to the first card. Compare your order with the parent reference.