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Astronomy Year / Week 08 / Tuesday
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Week 08 · Orion the Hunter

Tuesday

A red star and a blue star
// A winter giant and a summer triangle
⏱ about 15 min

Tuesday: A red star and a blue star

Rocket stares at Orion. "Are all the stars white?"

Raven looks at the top corner. "What do you notice? That one looks orange-red."

Nova points to the bottom corner. "Hint: now compare it with this one."

Two famous stars

StarWhere in OrionColor
Betelgeuseupper leftred
Rigellower rightblue

Betelgeuse is a red star at Orion's upper left.

Rigel is a blue star at Orion's lower right.

Look closely. Their colors look different!

COLOR CHECK
  • Read the question.
  • Tap your answer.
What color is Betelgeuse?
What color is Rigel?
Where is Rigel in Orion?
Star color factTrue or false?
Betelgeuse is at the upper left of Orion.?
Betelgeuse and Rigel are the same color.?
WHY THIS EXERCISEStars come in different colors. We learn why next week.

Giant stars

Betelgeuse is a red giant star.

Rigel is a blue giant star.

Both are huge, much bigger than our Sun.

They look small because they are so far away.

ORION'S COLORS
  • Read the question.
  • Tap your answer.
Where is Betelgeuse in Orion?
What kind of star is Rigel?
Why do these giant stars look small?
Which star is at the opposite corner from Betelgeuse?
FIND THE COLORS IN ORION
  • Tap a card.
  • Then tap its spot.
1First
2Next
3Then
4Last
Giant starTrue or false?
Betelgeuse is a red giant.?
Rigel is smaller than our Sun.?
Star colors can look different.?
Rigel is at the upper left.?
WHY THIS EXERCISEOrion is a great place to see star colors.
Draw Orion. Color Betelgeuse red and Rigel blue.

You spotted star colors! Tomorrow we meet Orion's summer partner.

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