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Unit 11: The Sun and Components of the Universe - Review of Stars and Galaxies, Exercises of Astronomy

A review of key concepts related to stars and galaxies, including the definition of nebulas, galaxies, the Sun, H-R diagram, magnitudes, black holes, and the life cycle of stars. It also covers the classification of stars and galaxies, the properties of different types of galaxies, and the composition of the universe.

Typology: Exercises

2021/2022

Uploaded on 09/27/2022

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Name ____________________________ Date_________________
Unit 11: The Sun and Components of the Universe Review
1. Nebula- Clouds of gas and dust
2. Galaxy - Made up of stars and Nebulae
3. The Sun - A yellow medium sized star. Found in the main sequence. Closest star to the
Earth. Located in the Milky Way Galaxy
4. H-R Diagram Measures a stars brightness/luminosity/magnitude and Temprature
5. Magnitude /Luminosity A stars brightness
6. Black Hole A black hole is an area in space from which nothing can escape, including
light
7. What group of stars does the Sun belong to on the H-R diagram? Main Sequence
8. What is the hottest color of star according to the H-R diagram? Blue
9. What is the coolest color of star? Red
10. Where are hot stars located on the H-R diagram? Left
11. Where are cooler stars located on the H-R diagram? Right
12. What type of star will become a black hole? Massive Star (Supergiant)
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Name ____________________________ Date_________________

Unit 11: The Sun and Components of the Universe Review

  1. Nebula- Clouds of gas and dust
  2. Galaxy - Made up of stars and Nebulae
  3. The Sun - A yellow medium sized star. Found in the main sequence. Closest star to the Earth. Located in the Milky Way Galaxy
  4. H-R Diagram Measures a stars brightness/luminosity/magnitude and Temprature
  5. Magnitude /Luminosity A stars brightness
  6. Black Hole A black hole is an area in space from which nothing can escape, including light
  7. What group of stars does the Sun belong to on the H-R diagram? Main Sequence
  8. What is the hottest color of star according to the H-R diagram? Blue
  9. What is the coolest color of star? Red 10.Where are hot stars located on the H-R diagram? Left 11.Where are cooler stars located on the H-R diagram? Right 12.What type of star will become a black hole? Massive Star (Supergiant)

13.What characteristics do scientists use to classify stars? HR diagram

(Temperature & Luminosity)

14.What will our Sun become after it runs out of hydrogen? White Dwarf 15.In order to find the temperature of a star scientist look at the stars Color 16.What galaxy is our sun located in? Milky way 17.Where in that galaxy is our sun located?

The outer edge of one of the spiral arms 18.What is the closest star to the Earth? The Sun

19.What force holds a galaxy and stars together? Gravity 20.The process that stars use to produce energy is called Nuclear Fusion 21.What elements have to fuse together in order for stars to produce energy? Hydrogen & Helium 22.Why does our Sun appear brighter than any other star in the galaxy? It is closer to us

28.Name the steps in the life cycle of a Supergiant?

**1. 2. Which group of stars are hot, but dim? White DwarfsName a Main sequence star that is NOT our Sun. Sirus

  1. Which has a hotter surface temperature, a Supergiant or a White Dwarf? WhiteDwarf
  2. What color is** **Rigel****? Blue White
  3. What are the 4 categories listed in bold on the H-R Diagram? Red Giants,Supergiant, white Dwarfs, & Main Sequence**

Nebula Massivestar Supergiant^ Red Supernova

Neutron Star

Black Hole

**6. What star is brighter than Aldebaran, but dimmer than Spica? Polaris

  1. What star is hotter than 40 Eridani? Spica
  2. What is the brightest star on the H-R Diagram? Deneb
  3. What is the hottest star on the H-R Diagram? Spica**