1. Let's start
with our
Prayer First.
Scienc
e.
Our Father, Who art in heaven,
hallowed be Thy name; Thy kingdom
come; Thy will be done on earth as it is
in heaven.
3. What is this
Picture is?
It is a constellation.
and about constellation it is build up of a
group of what?
■ It’s build up or made of a group of stars.
And now let’s start with our lesson about
4. Science 9
4th Grading Week 1 Lesson 1
Introduction and
Characteristics of
Stars
Presented by : Marjolaine Valerio
SCIENCE
STARS
5. Let’s watch a Video!
Characteristics of Stars
Title:
adventures in ISTEM
Owner of the
Video:
6. What color have the
coolest temperature?
01.
Red stars.
ANSWER THE FOLLOWING QUESTIONS.
02.
-Color
-Size
-Brightness
-Mass
How can we classify a
star, what are the traits
of a star?
7. What is
Astronomy? is a natural science that studies celestial
objects and phenomena. It uses mathematics,
physics, and chemistry in order to explain
their origin and evolution. Objects of interest
includes planets, moons, stars, nebulae,
galaxies, and comets.
Spectroscopy is the
study of the interaction
of light and matter.
Many types of
spectroscopy rely on
the
ability of atoms and
molecules to absorb or
emit electromagnetic
(EM) radiation.
8. The Hubble Space Telescope is a
space telescope that was launched
into low Earth orbit in 1990 and
remains in operation. It was not the
first space telescope, but it is one of
the largest and most versatile,
renowned both as a vital research
tool and as a public relations boon
for astronomy.
10. WHAT IS A STAR?
A star develops from a
giant, slowly rotating cloud
that is made up entirely or
almost entirely of
hydrogen and helium.
According to NASA, this
collapsing material grows
hotter and denser, forming
a ball-shaped protostar.
11. Sirius Star
Sirius is known for being
the brightest star in
the night sky and is
nearly twice as bright as
the next brightest star,
Canopus
with a magnitude of -
0.72
12. Sirius Star
Sirius is also known as
the 'Dog star' or Sirius A
because it is part of the
constellation
Canis Major, which is
Latin for
“the greater dog.”
13. FACTS ABOUT
OUR TOPIC
Constellations is
imaginary patterns of
the stars.
Constellation : Five constellations in the
Northern Hemisphere
that Circle the pole star
(Polaris).
Circumpolar :
14. How are constellations
named? Most of the
constellation names we know
came from the ancient Middle
Eastern, Greek, and Roman
cultures.
How are constellations
named? :
15. Examples of
constellations:
One constellation tradition
is the western zodiac,
which is made up of 12
constellations: Aries,
Taurus, Gemini, Cancer,
Leo, Virgo, Libra,
Scorpio, Sagittarius,
Capricorn, Aquarius and
Pisces.
20. The North Star or Pole Star –
aka Polaris – is famous for
holding nearly still in our sky,
while the entire northern sky
moves around it. That's
because it's located nearly at
the north celestial pole, the
point around which the entire
northern sky turns.
(TAKE NOTES)
What Polaris is :
21. This name comes from the Latin
“Stella Polaris,” which means
“Pole Star”. In Ancient Greece,
the North Star was called
“Kynosoura,” translated as “the
dog's tail.”
(TAKE NOTES)
What Polaris is :
22. A spectrograph sometimes called a
spectroscope or spectrometer breaks
the light from a single material into its
component colors the way a prism
splits white light into a rainbow. It
records this spectrum, which allows
scientists to analyze the light and
discover properties of the material
interacting with it.
24. Brightness
There are two characteristics define brightness :
Luminosity and Magnitude
Luminosity is the amount of light that a star
radiates.
The size of the star and its surface temperature
determine its luminosity.
29. The parallax angle is the angle between the
Earth at one time of year, and the Earth six
months later, as measured from a nearby star.
Astronomers use this angle to find the distance
from the Earth to that star.
Measuring Distance
30. Color
Stars have a different colors white, blue,
yellow, orange, and red. The color indicates
the star's temperature in its photosphere, the
layer where the star emits most of its visible
light.
31. Color
Color is a way that we describe an object based
on the way that it reflects or emits light. Your
eye can see different colors because a part of
your eye called the retina is sensitive to
different wavelengths of light.
33. They may contain the mass of one or two Suns
but are often just 20 to 40 km in diameter.
White dwarf stars are a bit bigger - often
similar in size to our planet Earth. The largest
supergiant stars can be more than 1500 times
larger than our Sun. This makes them over
2,000 million km across.
SIZE
34. Scientists use the Kelvin
scale because it is an
absolute measure of
temperature and is
directly related to kinetic
energy and volume.
Surface
Temperature
35. The surface temperature
of a star depends in part
on its mass and affects its
brightness and color.
Surface
Temperature
37. Astronomers represent the mass
of a star in terms of the solar
mass, the mass
of our sun. For instance, Alpha
Centauri A is 1.08 solar masses.
Mass
38. Alpha Centauri includes a pair of bright
stars that orbit each other a yellow,
sunlike star named Alpha Centauri A
and a redder star named Alpha
Centauri B. These two stars are about 4.4
light-years from the Sun. They complete
one orbit about every 80 years.
39. Stars with similar masses might not be similar
in size because they have different densities.
For instance, Sirius B is roughly the same mass
as the sun, but is 90,000 times as dense, and
so is only a fiftieth its diameter. The mass of a
star affects surface temperature.
Mass
40. Sirius B is one of the largest known white
dwarf stars and is 10,000 times dimmer
than Sirius. It's so dim that astronomers
couldn't estimate its mass until 2005 by using
data from the Hubble Space Telescope.
41. Sirius B is about 10,000 times fainter than
Sirius A. The white dwarf's feeble light makes
it a challenge to study, because its light is
swamped in the glare of its brighter
companion as seen from telescopes on Earth.
44. as you can see Stars are so
important to us because they have
helped humans navigate through
earth,
VALUES
INFUSION
45. By looking for patterns, the stars and
locations can be much easier to spot.
The constellations had uses in ancient
times. They were used to help keep track
of the calendar.
VALUES
INFUSION
47. What color is the hottest and
coldest star?
01.
Red/Blue Pink/Red
Green/Blue
Choose the correct Answer.
02.
Brightness Color
All of the Above
What are some
characteristics of stars?
03.
Hydrogen and Oxygen Helium and Carbon
Helium and Hydrogen Oxygen and Carbon
04.
Constellation spectrograph
parallax
A device that breaks light
into colors and produces an
image is a?
What are stars mostly made of?
Answer : RED/BLUE
Answer : ALL OF THE ABOVE
Answer : HELIUM AND HYDROGEN
Answer : SPECTROGRAPH
