← Back to course
Astronomy Year / Week 07 / Wednesday
3/6
Week 07 Β· Seasons in the Sky

Wednesday

Long days, short days
// New stars and new sunsets
⏱ about 15 min

Wednesday: Long days, short days

In summer, Rocket plays outside after dinner. It is still light!

In winter, it gets dark before dinner.

Raven asks, "What do you notice about daylight?"

Nova tips sideways. "Hint: Earth leans a little as it travels."

Earth is tilted

Earth is tilted. It leans to one side.

In summer, our part of Earth leans toward the Sun.

We get more hours of daylight.

In winter, our part leans away from the Sun.

We get fewer hours of daylight.

So in summer, the Sun sets later in the evening.

In winter, the Sun sets earlier.

Safety first
Never look at the Sun.
Not with sunglasses. Not with binoculars. Not with a telescope.
The Sun can hurt your eyes very fast.
At sunset, notice the light. Do not stare at the Sun.
Daylight factTrue or false?
Summer has more hours of daylight than winter.?
In winter, the Sun sets later in the evening.?
Earth's tilt causes the seasons.?
It is safe to stare at the setting Sun.?
WHY THIS EXERCISEDaylight changes in a pattern every year.
DAYLIGHT CHECK
  • Read the question.
  • Tap your answer.
Which season has the most daylight?
What causes the seasons?

The longest and shortest days

Around this dateDaylight
June 21The longest daylight of the year
December 21The shortest daylight of the year

This is for us in the north.

Between those dates, daylight slowly grows or shrinks.

TILT AND DAYLIGHT
  • Read the question.
  • Tap your answer.
In summer, which way does our part of Earth lean?
About when is the longest daylight for us?
About when is the shortest daylight for us?
In winter, does the Sun set earlier or later?
Try it
Make Earth tilt with a ball and a pencil.
Push the ball onto the pencil, a little crooked.
A grown-up holds a lamp in the middle of a table.
Walk the tilted ball around the lamp. Keep the tilt the same way.
Safety first
A grown-up handles the lamp. Lamps get hot.
Point the pencil away from faces.
THROUGH THE YEAR
  • Tap a card.
  • Then tap its spot.
1Winter
2Spring
3Summer
4Fall
Draw a long summer day and a short winter day.

You figured out long and short days! Tomorrow you start a sunset log.

← Tuesday