Act+7+Stars

Act 7

__//**Think about it**//__
 * The stars are different colors(Blue and white). Also some stars are brighter than others. The sizes are also different.
 * Yes, some stars seem brighter than others. Some stars are also larger than other smaller stars. The colors vary from blue to white and sometimes yellow. The size of the star might be depended on distance from Earth.-Shayam Patel

Main idea DETAILS E73: 1. Our solar system is part of the Milkey Way galaxy. Our stellar neighborhood is about 2/3 of the way out on a spiral arm that stretches from the core of the galaxy. The galaxy contains hundreds of billions of stars, and Astronomers use a magnitude scale to describe the brightness of the objects they see in the sky. 2. The brightest star in the sky is called a Sirius A, and its magnitude is -1.4. Of course, the Sun is brighter. The Sun is at -27, and the moon is -12.6. -Alyssa Walker

When a star is brighter, it is usually a greater temperature. A stars brightness decreases with the square of the distance. A high mass star burns fuel more quickly because its mass is much higher. //Allyson Fancher//
 * __Reading Guide: Digging Deeper__**
 * 1. What is the relationship between a stars temperature and its brightness?**
 * 2. Which type of star burns fuel quicly? Explain why.**
 * //3.Rank the three categories of stars in order of how long they are expected to live.//**
 * 1) //High mass = lowest//
 * 2) //meduim= middle//
 * 3) //Low mass- highest - **Kira Turner**//

The relationship determined by how the star is classified. This would be by brightness, temperature and distance. -Kori
 * 1.What is the relationship between a stars temperature and its brightness?**

1. By how bright they are, which is their magnitude. 2. A cloud dust begins to clump and swirl. Then temperatures rise greatly, and the stellar fusion reaction starts up. 3. Depending on their mass, will determine their life span. After it shrinks and a cloud forms, its dead. -Carlos Davila
 * Check Your Understanding p.E77**

1) I notice that some stars seem farther away then others, i also notice that they are not all the same color, but it is hard to tell from such a long distance with no microscope. It is clear that some appear to be different colors. It is also clear or at least it looks like some stars are bigger then other ones, but it could just be the distance we are at that causes this illusion. 2) Yes some stars do seem brighter than others, it could just be because of the distance far away they are from us, because if you see something bright but its close of course it will be brighter closer then it will far away. - **David Meneses**
 * __Think about it__**
 * //1) As you stargaze, what do you notice about the stars?//
 * //2) Do some stars appear brighter than others?//

1. Classes tell you what temperature stars are, and their luminostity. In addition it will tell you their mass. There are a total of 4 different classes. There are Super Giants, Red Giants, White Dwarfs, and main sequence. Stars spend most of their time in the Main sequence stage. - Joshua Branker
 * Understanding applying what you learned p E78**

Sean# Swag
 * Digging Deeper:**
 * Main Idea-** The lives of stars.. astronomers use the term luminosity for the total rate at which a star emits radiation energy.
 * Evidence-** Unlike apparent brightness, luminosity is an intrinsic property.

the brightness of a star decreases as the distance does. Astronomers use a magnitude scale to classify stars. the magnitudes ranges from about 1-30. Scientist have a more precise system now. They use color and temperature to classfiy stars as well as chemical make up. -Amani
 * Main Idea: Classifying Stars**
 * How have scientist changed the way they measure the magnitude or brightness of a star?**

__**2 column notes pg E 73**__ Today scientists use a more precise system of magnitudes to describe brightness. The brightest star is called Siruis A and its magnitude is -1.4. The sun is brighter at -27 and the moon is -12.6. -**Angelo Nuni**

The nebula is commonly refered to as a gas cloud in space- **Andrew Morris** __**Digging Deeper continued**__ 2. stars spend most of their lifetime, 90% of it, in the main sequence. 3. stars with most mass burn quicker. its starts to lose its mass in the form of stellar wind. -Antoneta
 * Main Idea:** Star Mass is the determining factor for how long a star lives
 * Details:** 1. stars are constantly losing mass.
 * Question: How does a star begin to die?**

Astronomers use the term luminosity for the total rate at which a star emits radiation energy. Luminosity is not apparent brightness its an intrinsic property. Luminosity dose not depend on how far away the star is. -//Andrej Gavric//
 * __The lives of stars (PG E.74)__**

Geo Words: 1.) Luminosity – is the rate of which a star produces radiation energy 2.) Molecular Cloud - this is the start of a star life. It starts with a cloud of gas and dust 3.) Supernova – is the death of a star. This happens when the core has burned out - Brandy Gibson

Investigation: Our Community's Place Among The Stars (Pg. E71-72) Part B: 1a) Luminosity b) surface temperature c) Temperature: 6500 degrees kelvin Luminosity: 1 d) answered on the question #1 map\ Part B Table: Sirius A- Main sequence star Arcturus- Main sequence Vega- Main sequence Capella- Red giants Rigel- Main sequence Procyon A- White dwarf Betelgeuse- Red giant Altair- Main sequence Aldebaran- Main sequence Spica- Main sequence Pollux- Main sequence Deneb- Supergiant Procycon B- White dwarf Sirius B- White dwarf -Kayleah Beltran

Newborn stars: Newborn stars are like baby chickens pecking their way out of a shell. As these infants stars grow, they bathe the cloud surrounding them in strong ultraviolent radiation. This vaporizes the cloud, creating beautiful sculpted shapes in the cloud.