File
... Can occur with stars whose masses are more than X 25 of our Sun The remains of the supernova explosion is so large that nothing can escape due to its immense gravitational force (even light) ...
... Can occur with stars whose masses are more than X 25 of our Sun The remains of the supernova explosion is so large that nothing can escape due to its immense gravitational force (even light) ...
H-R Diagram Student
... 4. Name a star that is very dim and red. ____________________________________________ 5. Compare our sun to Alpha Centauri A in terms of brightness, color and surface temperature.___________________________________________________________________ _____________________________________________________ ...
... 4. Name a star that is very dim and red. ____________________________________________ 5. Compare our sun to Alpha Centauri A in terms of brightness, color and surface temperature.___________________________________________________________________ _____________________________________________________ ...
chapter 18
... Astronomers measure stellar distances in three different units. The smallest of these is a) the light-year. b) the absolute magnitude. c) the astronomical unit. d) the parsec. ...
... Astronomers measure stellar distances in three different units. The smallest of these is a) the light-year. b) the absolute magnitude. c) the astronomical unit. d) the parsec. ...
Lifecycle of Stars - Mrs. Plante Science
... • GRAVITY causes this gas and dust to come together, forming larger and larger balls of gas and dust molecules. • When the mass becomes large enough, gravitational contraction results in high pressure and temperature, and a protostar is formed. ...
... • GRAVITY causes this gas and dust to come together, forming larger and larger balls of gas and dust molecules. • When the mass becomes large enough, gravitational contraction results in high pressure and temperature, and a protostar is formed. ...
Stars from Afar
... A spectrograph (spek truh graf) breaks the light from an object into colors and photographs the resulting spectrum. Astronomers use spectrographs to get information about stars, including their chemical compositions and temperatures. ...
... A spectrograph (spek truh graf) breaks the light from an object into colors and photographs the resulting spectrum. Astronomers use spectrographs to get information about stars, including their chemical compositions and temperatures. ...
Name: Notes – #45 The Diverse Sizes of Stars 1. A Hertzsprung
... 6. Super giants tend to have surface temperatures cooler than the sun but emit 104 time or more energy than the Sun. Why is this true? 7. The size of the star Betelgeuse in the constellation Orion is approximately the same size as ____________’s orbit around the Sun. 8. What stars have the same temp ...
... 6. Super giants tend to have surface temperatures cooler than the sun but emit 104 time or more energy than the Sun. Why is this true? 7. The size of the star Betelgeuse in the constellation Orion is approximately the same size as ____________’s orbit around the Sun. 8. What stars have the same temp ...
Lab 21.1 Classifying Stars
... third group from the top of the page is not in the text and is called Subgiants. 6. Answer the questions that follow below, directly onto this sheet. 7. Hand in on due date. Questions: 1. Compare the star’s mass to its luminosity and to its temperature. Can you find any basic relationship between th ...
... third group from the top of the page is not in the text and is called Subgiants. 6. Answer the questions that follow below, directly onto this sheet. 7. Hand in on due date. Questions: 1. Compare the star’s mass to its luminosity and to its temperature. Can you find any basic relationship between th ...
Main-sequence stars - Stellar Populations
... Off the Main Sequence • Stellar properties depend on both mass and age: those that have finished fusing H to He in their cores are no longer on the main sequence ...
... Off the Main Sequence • Stellar properties depend on both mass and age: those that have finished fusing H to He in their cores are no longer on the main sequence ...
Reading Preview
... Classifying Stars Learning Target: I can ___________________________________________ Key Concept: Characteristics used to classify stars include _________, ________________, _________, ______________, and ______________. A star’s ________ gives clues about the star’s temperature. The coolest stars ...
... Classifying Stars Learning Target: I can ___________________________________________ Key Concept: Characteristics used to classify stars include _________, ________________, _________, ______________, and ______________. A star’s ________ gives clues about the star’s temperature. The coolest stars ...
F03HW09
... What does luminosity measure that is different from what absolute visual magnitude measure? The luminosity is a measure of the total amount of energy emitted by a star in one second. The absolute visual magnitude is related to the portion of the total luminosity emitted only in the visible portion o ...
... What does luminosity measure that is different from what absolute visual magnitude measure? The luminosity is a measure of the total amount of energy emitted by a star in one second. The absolute visual magnitude is related to the portion of the total luminosity emitted only in the visible portion o ...
Unit 11 Guide: Concepts of Earth Science Stars, Galaxies, and the
... 5. What is the difference between absolute and apparent magnitude? What is luminosity? 6. What are the three types of spectra? How can scientists use absorption spectra to determine the elements that compose a star? 7. What are stars made of and how do they produce their light? What is the differenc ...
... 5. What is the difference between absolute and apparent magnitude? What is luminosity? 6. What are the three types of spectra? How can scientists use absorption spectra to determine the elements that compose a star? 7. What are stars made of and how do they produce their light? What is the differenc ...
Chapter 8 lesson 4 Notes
... Stars form when matter comes together and starts to give off energy. ...
... Stars form when matter comes together and starts to give off energy. ...
Red Giants and White Dwarfs
... White Dwarf Stars • “Dead” cores of former stars, no longer burning nuclear fuel, radiating away leftover heat • Made mostly of carbon and oxygen nuclei, in a diamond crystal structure (“like a diamond in the sky”) • Crushed to incredible density by their own gravity: the mass of the sun but the si ...
... White Dwarf Stars • “Dead” cores of former stars, no longer burning nuclear fuel, radiating away leftover heat • Made mostly of carbon and oxygen nuclei, in a diamond crystal structure (“like a diamond in the sky”) • Crushed to incredible density by their own gravity: the mass of the sun but the si ...
18.1 NOTES How are stars formed? Objective: Describe how stars
... off heat and light. The Sun is only one of billions of stars that make up are galaxy, and there are billions of galaxies. Most stars appear to be white in color. However, there are blue, white, yellow, orange, and red stars. The color of a star determines how hot in temperature it is. Stars differ i ...
... off heat and light. The Sun is only one of billions of stars that make up are galaxy, and there are billions of galaxies. Most stars appear to be white in color. However, there are blue, white, yellow, orange, and red stars. The color of a star determines how hot in temperature it is. Stars differ i ...
How Do Astronomers Measure the Brightness of a Star?
... categorized the absorption spectra they received from stars using letters Stars are classified into 7 main stellar spectra from “O” (hottest, bluest) to “M” (coolest, ...
... categorized the absorption spectra they received from stars using letters Stars are classified into 7 main stellar spectra from “O” (hottest, bluest) to “M” (coolest, ...
Hertzsprung-Russell Diagram
... The Main Sequence At one end, the stars are big, hot and bright. Due to their color and size they are called blue giants, and the very largest are blue supergiants. At the other end they are small, cool and dim and are known as red dwarfs. The sun is right in the middle. ...
... The Main Sequence At one end, the stars are big, hot and bright. Due to their color and size they are called blue giants, and the very largest are blue supergiants. At the other end they are small, cool and dim and are known as red dwarfs. The sun is right in the middle. ...
Lecture 5: Stars
... about 100 pc (further to some bright stars). The problem is that if we see a star with a surface temperature of 3000K – is it a nearby red dwarf, or a distant red giant? Without more information than colour and apparent brightness we just can’t tell. And what are their physical properties – mass and ...
... about 100 pc (further to some bright stars). The problem is that if we see a star with a surface temperature of 3000K – is it a nearby red dwarf, or a distant red giant? Without more information than colour and apparent brightness we just can’t tell. And what are their physical properties – mass and ...
How do stars form as a function of stellar mass
... address. Herbig Ae/Be stars span the mass range from roughly 1.5 to 10 solar masses, and luminosities from a few to tens of thousands solar luminosities. If there is a break between low and high mass star formation, it occurs within this vast (but relatively sparsely populated) class of objects. Her ...
... address. Herbig Ae/Be stars span the mass range from roughly 1.5 to 10 solar masses, and luminosities from a few to tens of thousands solar luminosities. If there is a break between low and high mass star formation, it occurs within this vast (but relatively sparsely populated) class of objects. Her ...
Stars are classified by how hot they are (temperature)
... Due to Earth's rotation, we see the sun rise and set, and stars come and go in the night Stars do move in space, but because they are so distant, their motion is hard for us to ...
... Due to Earth's rotation, we see the sun rise and set, and stars come and go in the night Stars do move in space, but because they are so distant, their motion is hard for us to ...
Stars 19.1
... into colors using a spectrum The spectrum colors from the light show the star’s temperature and composition. The pattern of lines also show some of the elements in the star’s atmosphere. ...
... into colors using a spectrum The spectrum colors from the light show the star’s temperature and composition. The pattern of lines also show some of the elements in the star’s atmosphere. ...
TU Muscae and the Early-type Overcontact Binaries
... Binary orbital plane is oriented so that the two stars pass in front of one another as seen from Earth. The light curve is rich in information about the two stars. ...
... Binary orbital plane is oriented so that the two stars pass in front of one another as seen from Earth. The light curve is rich in information about the two stars. ...
Distances farther out
... Earlier CN break was used to get absolute mag. But now known , some stars (giants by all other criterion) - wrongly called dwarfs on basis on CN alone . (4215 A break was too weak to classify them as giants) . Coz of carbon & Nitrogen abundances, well below solar metal deficient pop II stars in ga ...
... Earlier CN break was used to get absolute mag. But now known , some stars (giants by all other criterion) - wrongly called dwarfs on basis on CN alone . (4215 A break was too weak to classify them as giants) . Coz of carbon & Nitrogen abundances, well below solar metal deficient pop II stars in ga ...
Astro-Spectroscpy
... Though the surface temperature of the Sun is 5,770 degrees Kelvin, the Sun is surrounded by very hot gas in the solar corona at more than a million degrees. Solar flares and coronal mass ejections (CMEs) frequently erupt from the Sun emitting intense radiation and charged particles. ...
... Though the surface temperature of the Sun is 5,770 degrees Kelvin, the Sun is surrounded by very hot gas in the solar corona at more than a million degrees. Solar flares and coronal mass ejections (CMEs) frequently erupt from the Sun emitting intense radiation and charged particles. ...
LT 5: I can describe how astronomers determine the composition
... star a large celestial body that is composed of gas and that emits light. Nuclear fusion is the combination of light atomic nuclei to form heavier atomic nuclei Astronomers learn about stars by analyzing the light that the stars emit. ...
... star a large celestial body that is composed of gas and that emits light. Nuclear fusion is the combination of light atomic nuclei to form heavier atomic nuclei Astronomers learn about stars by analyzing the light that the stars emit. ...
Stellar classification
In astronomy, stellar classification is the classification of stars based on their spectral characteristics. Light from the star is analyzed by splitting it with a prism or diffraction grating into a spectrum exhibiting the rainbow of colors interspersed with absorption lines. Each line indicates an ion of a certain chemical element, with the line strength indicating the abundance of that ion. The relative abundance of the different ions varies with the temperature of the photosphere. The spectral class of a star is a short code summarizing the ionization state, giving an objective measure of the photosphere's temperature and density.Most stars are currently classified under the Morgan–Keenan (MK) system using the letters O, B, A, F, G, K, and M, a sequence from the hottest (O type) to the coolest (M type). Each letter class is then subdivided using a numeric digit with 0 being hottest and 9 being coolest (e.g. A8, A9, F0, F1 form a sequence from hotter to cooler). The sequence has been expanded with classes for other stars and star-like objects that do not fit in the classical system, such class D for white dwarfs and class C for carbon stars.In the MK system a luminosity class is added to the spectral class using Roman numerals. This is based on the width of certain absorption lines in the star's spectrum which vary with the density of the atmosphere and so distinguish giant stars from dwarfs. Luminosity class 0 or Ia+ stars for hypergiants, class I stars for supergiants, class II for bright giants, class III for regular giants, class IV for sub-giants, class V for main-sequence stars, class sd for sub-dwarfs, and class D for white dwarfs. The full spectral class for the Sun is then G2V, indicating a main-sequence star with a temperature around 5,800K.