Stars

Stars

Recognize the physical attributes of stars in the night sky such as number, size, color and patterns.

STARS

THINK: What do you already know about the size, brightness, and color of STARS?

FLASHLIGHT ACTIVITY

Think about our activity. What happened when we moved the flashlight closer? Farther away?

Open Ended

Write a reflection about the flashlight activity.

Multiple Choice

The sun is a star

• True

• False

All about Stars

• Star may be different sizes and colors

• When seen from the Earth, most stars appear as small points of light because they are very far away.

Open Ended

Write what you notice about each star ( STAR A, STAR B, STAR C, AND STAR D).

Think about their size and brightness and how close they are to earth.

Star Colors

• The color of a star tells us the temperature of a star

• Red stars are the coolest

  
  

• Yellow stars are hotter than red stars.

• White stars are hotter than red and yellow

• Blue stars are the hottest stars of all.

Multiple Choice

What color of star is the coolest?

• Red
• Yellow
• Blue
• White

Multiple Choice

What color of star is the hottest?

• Blue
• Red
• Yellow
• Orange

Why are some stars brighter than others?

One reason a star can seem brighter than another star is due to how much power a star has - which can also be explained as the amount of wattage it has (think of light bulbs!). Stars with more power (or higher wattage) will shine brighter than those with less power (lower wattage).

Why are some stars brighter than others?

Another reason is the distance of the star from the Earth. Just because a star looks brighter, doesn’t mean it actually is brighter. The more distant an object is, the dimmer it appears. Therefore, if two stars have the same level of brightness, but one is farther away, the closer star will appear brighter than the more distant star - even though they are equally bright!

Open Ended

What are two reasons that one star can appear brighter than another star?

Multiple Choice

The actual amount of energy a star gives off is its...

• true brightness

• apparent brightness

Multiple Choice

All stars are the same color and same size.

• True

• False