chapter 10. the stars- true of false? we see the same stars in the sky all year. stars in a...
TRANSCRIPT
THE STARSChapter 10
The Stars- True of False?
We see the same stars in the sky all year.
Stars in a constellation are all the same distance from Earth.
The brighter stars are closer or more powerful.
Polaris (the North Star) is the brightest star.
The light-year is a unit of time.
The Stars
In this chapter, we will investigate these questions: How any why do astronomers study the
stars? What properties do we use to describe
stars? What properties do all stars share? How is the Sun similar to or different
from other stars in the sky? What properties of stars give us
information to learn more about the universe?
Star Pictures
Have you ever tried to find figures in the clouds?
Would the cloud look the same the next day or next week?
Clouds move and change in response to temperature, moisture, wind, etc. Clouds are not a stable reference point in the sky.
Stars do provide a stable reference point in the night sky.
Star Pictures
When you look up at the stars, what are you looking at?
How many stars can you see on a clear night?
Where do the stars go during the day? Why can we only see them at night?.
Star Pictures
How have people throughout history made sense of the stars? The noticed patterns in the sky that
recur each night and across seasons in a predictable way.
Read “It’s a Bird… It’s a Plane” p. 458
Star Pictures
Constellations are groups of stars that define regions of the night sky
Different cultures defined different constellations based on patterns they saw.
They used these constellations as reference points. Farmers knew when to plant their crops and
when to harvest based on the position of different constellations in the sky.
They associated names and stories with the constellations to help them remember.
Star Pictures
Today, there are 88 constellations that are recognized by the International Astronomical Union (IAU).
These constellations divide the sky into 88 regions.
Do you think we can see the same stars all year long?
Star Pictures
Figure 10.2 shows a picture of Orion (the Hunter) and Taurus (the Bull).
Locate Orion on the sky maps on p. 460 – 461.
When does Orion appear? How might people use this
information as a point of reference? Look closely at the direction labels
on the sky maps? Is there a typo in your book?
Star Pictures
Do you think people in Australia see the same stars as we do?
Look at the pictures of the night sky in the Northern and Southern hemisphere and see if your answer is correct.
Star Pictures
Complete Reflect & Connect #1-4 p. 462
Read “Dark Skies” p. 463 – 464 and answer the following questions: What is light pollution? How does light pollution affect star
gazing? Can you think of a better name for this
phenomenon?