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STANDARDS
CCSS: 4.G.A.1
TEKS: 4.6A
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Cool Constellations
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People have made up stories about stars for thousands of years! In fact, most of the constellations get their names from ancient Greek and Roman myths. Constellations are groupings of stars that form a pattern. There are 88 total constellations. The stars that make up each constellation look close together. But most of them are trillions of miles apart. Read on to learn about a few famous constellations you can see from the Northern Hemisphere.
Orion
When to see it:Fall, winter, and spring evenings
Main stars:Rigel: Bluish star that is the 7th brightest in the skyBetelgeuse: Giant, reddish star that is 800 times larger than the sun
Myth:In Egyptian mythology, Sahu, father of the gods, is represented by Orion and a nearby constellation called Lepus. The main Egyptian gods are said to descend from the three stars of Orion’s belt. Some historians believe that the pyramids of Giza were built to line up with these stars.
Main stars:Rigel: Blue-colored star that is the 7th brightest in the skyBetelgeuse: Giant, red-colored star that is 800 times larger than the sun
Myth:In Egyptian mythology, Sahu is the father of the gods. He is represented by Orion and a nearby constellation called Lepus. The main Egyptian gods are said to descend from the three stars of Orion’s belt. Some historians believe that the pyramids of Giza were built to line up with these stars.
1A. What type of angle is angle A?
1B. Which angle in Orion is an obtuse angle? How do you know?
Lyra
When to see it: Summer evenings
Main stars:Vega: One of our closest neighbors and 5th brightest starEpsilon Lyrae: It’s actually four stars that orbit each other. But they look like a single star from Earth!
Myth:Some cultures see Lyra as a stringed instrument called a lyre. In Chinese mythology, the star Vega is particularly important. It represents a heavenly girl who fell in love with a human boy. When the goddess of heaven forced the girl to return to the sky, the boy followed her. But the angry goddess created the Milky Way galaxy and set it between them, so the two lovers could never meet.
When to see it:Summer evenings
Main stars:Vega:One of our closest neighbors and 5th brightest starEpsilon Lyrae: It’s actually four stars that orbit each other. But they look like a single star from Earth!
Myth:Some cultures see Lyra as a stringed instrument called a lyre. In Chinese mythology, the star Vega is very important. It represents a heavenly girl. She fell in love with a human boy. But the goddess of heaven forced the girl to return to the sky. The boy followed her. This angered the goddess. So the goddess created the Milky Way galaxy. She set it between the two lovers so they could never meet.
What kind of angle is angle D?
Taurus
When to see it:Fall, summer, and spring evenings
Main star:Aldebaran: Reddish star that is 14th brightest in the sky
Myth:In many cultures, Taurus represents a bull. Ancient Mesopotamians referenced the constellation in a famous story about a powerful king named Gilgamesh.
In his travels, Gilgamesh insulted the goddess Ishtar. She sent the Bull of Heaven to cause drought and earthquakes. Gilgamesh defeated the Bull and saved his people.
Main star:Aldebaran: Red-colored star that is 14thbrightest in the sky
Myth:In many cultures, Taurus represents a bull. Ancient Mesopotamians mentioned the constellation in a famous story about a powerful king. The king’s name was Gilgamesh. Once, he insulted a goddess named Ishtar. She sent the Bull of Heaven to cause drought and earthquakes. Gilgamesh defeated the Bull and saved his people.
Classify angle E.
Ursa Major
When to see it: Year-round and all night, highest in the sky during spring evenings
Main star:Alioth: The brightest star in Ursa Major. Sailors once used it to find their way across the ocean.
Myth:Many cultures see Ursa Major as a Great Bear. In an Iroquois myth, a party of hunters tracked a giant bear to the end of the world. But the bear leapt into the sky! The hunters followed and continue to chase him to this day. They are represented by the three leftmost stars that look like the bear’s “tail.”
The Big DipperThis is an asterism, a famous pattern of stars that is part of a constellation.
When to see it:Year-round and all night, highest in the sky during spring evenings
Main star:Alioth:The brightest star in Ursa Major. Sailors once used it to find their way across the ocean.
Myth:Many cultures see Ursa Major as a Great Bear. In an Iroquois myth, three hunters once tracked a giant bear. They followed the animal to the end of the world. But then the bear leaped into the sky! The hunters followed. It is said that they continue to chase the bear to this day. The hunters are represented by the three leftmost stars in Ursa Major. To some people, these three stars look like the bear’s “tail.”
The Big DipperThis is an asterism. It is a famous pattern of stars that is part of a constellation.
4A. These supplementary angles in Ursa Major add up to 180°. What is the measurement of angle F?
4B. What kind of angle is it?
Slideshow: Angles
Share an instructional slideshow about angles with your students.
How might the angles found within constellations have affected the stories people told about them?
Ursa Minor
What to Do
A ray is a straight line with only 1 endpoint. When 2 rays share an endpoint, they intersect to form an angle. We measure angles in degrees (°). We classify angles into 4 types based on their measurements.
Example
The angle shown on the protractor matches the angle in Ursa Minor (above). Classify it.
This angle is greater than 90° but less than 180°. We can confirm this by reading the protractor: It measures 145°.
This is an obtuse angle.
Continue Your Learning
<p>A long period of time with little or no rain</p>
<p>A figure formed when two rays meet at the same endpoint, or vertex. There are three main types of angles: acute (less than 90 degrees), right (90 degrees), or obtuse (greater than 90 degrees).</p>
<p>A part of a straight line that has one endpoint and continues endlessly in one direction</p>