30.3 Star Groups. Constellations Constellations:________________________...
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Transcript of 30.3 Star Groups. Constellations Constellations:________________________...
![Page 1: 30.3 Star Groups. Constellations Constellations:________________________ _____________________________________. Standard set of ____ constellations set.](https://reader036.fdocuments.us/reader036/viewer/2022082421/56649f585503460f94c7cf1e/html5/thumbnails/1.jpg)
30.3 Star Groups
![Page 2: 30.3 Star Groups. Constellations Constellations:________________________ _____________________________________. Standard set of ____ constellations set.](https://reader036.fdocuments.us/reader036/viewer/2022082421/56649f585503460f94c7cf1e/html5/thumbnails/2.jpg)
Constellations• Constellations:________________________
_____________________________________.
• Standard set of ____ constellations set by group of astronomers in 1930.– Acts as a road map to locate particular stars.
![Page 3: 30.3 Star Groups. Constellations Constellations:________________________ _____________________________________. Standard set of ____ constellations set.](https://reader036.fdocuments.us/reader036/viewer/2022082421/56649f585503460f94c7cf1e/html5/thumbnails/3.jpg)
Naming Constellations• ____________________________________
________________________.
• Names come from…– Real animals e.g. Ursa Major, “The Great Bear”
(The Big Dipper)– Imaginary animals e.g.Draco, “The Dragon”– Ancient Gods– Legendary Heroes
![Page 4: 30.3 Star Groups. Constellations Constellations:________________________ _____________________________________. Standard set of ____ constellations set.](https://reader036.fdocuments.us/reader036/viewer/2022082421/56649f585503460f94c7cf1e/html5/thumbnails/4.jpg)
Multiple-Star Systems
• Binary Stars : __________________________
______________________________________.
• Barycenter:____________________________
______________________________________.
• Estimated that more than half of all observed stars are multiple-star systems.
![Page 5: 30.3 Star Groups. Constellations Constellations:________________________ _____________________________________. Standard set of ____ constellations set.](https://reader036.fdocuments.us/reader036/viewer/2022082421/56649f585503460f94c7cf1e/html5/thumbnails/5.jpg)
Star Clusters• _________: groups of hundreds or
thousands of stars
• Globular Clusters:_____________________
_____________________________________.
• ____________: loosely shaped and rarely contains more than a few hundred stars.
![Page 6: 30.3 Star Groups. Constellations Constellations:________________________ _____________________________________. Standard set of ____ constellations set.](https://reader036.fdocuments.us/reader036/viewer/2022082421/56649f585503460f94c7cf1e/html5/thumbnails/6.jpg)
Galaxies• Galaxy:______________________________
___________________________________________________.
• Major building blocks of universe
• Typical galaxy is 100,000 l.y. in diameter and contains 200 billion stars
• Estimated that universe_________________
__________________.
![Page 7: 30.3 Star Groups. Constellations Constellations:________________________ _____________________________________. Standard set of ____ constellations set.](https://reader036.fdocuments.us/reader036/viewer/2022082421/56649f585503460f94c7cf1e/html5/thumbnails/7.jpg)
Types of Galaxies• ______________________: has a nucleus of
bright stars and flattened arms that spiral around the nucleus
• Elliptical Galaxies: vary in shape from nearly spherical to very elongated. Extremely bright in the center and have no spiral arms.
• Irregular Galaxies:______________________
________________________________________________________________. More rare than other galaxies.
![Page 8: 30.3 Star Groups. Constellations Constellations:________________________ _____________________________________. Standard set of ____ constellations set.](https://reader036.fdocuments.us/reader036/viewer/2022082421/56649f585503460f94c7cf1e/html5/thumbnails/8.jpg)
The Milky Way• Spiral galaxy in which the sun is one of
hundreds of billions of stars.
• ___________________________________________________________________.
• Takes sun 225 million years to complete one orbit.
• Closest galaxies are _____________away from Earth.
![Page 9: 30.3 Star Groups. Constellations Constellations:________________________ _____________________________________. Standard set of ____ constellations set.](https://reader036.fdocuments.us/reader036/viewer/2022082421/56649f585503460f94c7cf1e/html5/thumbnails/9.jpg)
Quasars• Discovered in 1963• ___________: quasi-stellar radio source; a very
luminous object that produces energy at a high rate.
• Not related to star but related to galaxies.• ______________________________________
___________________________________________________________.
• Believed that black holes are present in those galaxies