May 2009 Tz 2
... (d) Alnitak is a main sequence star with a luminosity similar to that of Antares. Use the value quoted in (c)(ii) to deduce that the mass of Alnitak is in the range 16 MS to 40 MS, where MS is the mass of the Sun. ...
... (d) Alnitak is a main sequence star with a luminosity similar to that of Antares. Use the value quoted in (c)(ii) to deduce that the mass of Alnitak is in the range 16 MS to 40 MS, where MS is the mass of the Sun. ...
Unit 11 Vocabulary
... 3. protostar - a very young star that is still gathering mass from its parent molecular cloud. This is the earliest phase in the process of a star’s evolution. 4. main sequence star - stars that are fusing hydrogen atoms to form helium atoms in their cores. Most of the stars in the universe are main ...
... 3. protostar - a very young star that is still gathering mass from its parent molecular cloud. This is the earliest phase in the process of a star’s evolution. 4. main sequence star - stars that are fusing hydrogen atoms to form helium atoms in their cores. Most of the stars in the universe are main ...
Reach_for_the_stars_final_questions.doc
... The following questions refer to the spectral sequence shown above. For questions 15 to 19 below, list the spectral type which is best described by the statement. (1 pt for each) 15. The sun is this spectral class. ______________________________________ 16. This spectral class contains the hottest s ...
... The following questions refer to the spectral sequence shown above. For questions 15 to 19 below, list the spectral type which is best described by the statement. (1 pt for each) 15. The sun is this spectral class. ______________________________________ 16. This spectral class contains the hottest s ...
The Life Cycle of Stars Webquest
... E = MC2 and learn how mass in the form of hydrogen atoms is converted to helium and causes a release of energy that makes stars shine. 3. You will also begin to understand the forces involved in stars that maintain this nuclear reaction and how these forces change as the star ages. 4. You will explo ...
... E = MC2 and learn how mass in the form of hydrogen atoms is converted to helium and causes a release of energy that makes stars shine. 3. You will also begin to understand the forces involved in stars that maintain this nuclear reaction and how these forces change as the star ages. 4. You will explo ...
The Life Cycle of Stars Webquest
... E = MC2 and learn how mass in the form of hydrogen atoms is converted to helium and causes a release of energy that makes stars shine. 3. You will also begin to understand the forces involved in stars that maintain this nuclear reaction and how these forces change as the star ages. 4. You will explo ...
... E = MC2 and learn how mass in the form of hydrogen atoms is converted to helium and causes a release of energy that makes stars shine. 3. You will also begin to understand the forces involved in stars that maintain this nuclear reaction and how these forces change as the star ages. 4. You will explo ...
Review 2
... Internal structure of our Sun and its chemical composition. What is the convection zone on the Sun and what are the granules and supergranules? What is the temperature in the Sun’s core? What is the photosphere, chromosphere and corona? What is their temperature and what causes their color? What is ...
... Internal structure of our Sun and its chemical composition. What is the convection zone on the Sun and what are the granules and supergranules? What is the temperature in the Sun’s core? What is the photosphere, chromosphere and corona? What is their temperature and what causes their color? What is ...
Stellar Distances and Magnitudes
... Hertzsprung-Russell (M_V, B-V) diagram for the 16631 single stars from the Hipparcos Catalogue with relative distance precision better than 10% and sigma_(B-V) less than or equal to 0.025 mag. Colours indicate number of stars in a cell of 0.01 mag in (B-V) and 0.05 mag in V ...
... Hertzsprung-Russell (M_V, B-V) diagram for the 16631 single stars from the Hipparcos Catalogue with relative distance precision better than 10% and sigma_(B-V) less than or equal to 0.025 mag. Colours indicate number of stars in a cell of 0.01 mag in (B-V) and 0.05 mag in V ...
1. Star A has a distance of 3 parsecs. What is its parallax angle? 1a
... What would be the apparent brightness of the Sun if we were located at half Earth’s distance from the Sun. It woul dbe 4 times as bright, ie. 4 × 1300W/m2. What would be the apparent brightness of the Sun if we were located at twice Earth’s distance from the Sun. It would be four times less ie. 1300 ...
... What would be the apparent brightness of the Sun if we were located at half Earth’s distance from the Sun. It woul dbe 4 times as bright, ie. 4 × 1300W/m2. What would be the apparent brightness of the Sun if we were located at twice Earth’s distance from the Sun. It would be four times less ie. 1300 ...
Science 8 Name: Unit 2 Astronomy Date: Period: LAB
... 1. Using the data in the table, plot the location of each star and label it with its name. 2. Complete the data table based on the location of the star on the HR Diagram. 3. Color the columns of the HR Diagram. 4. Answer the questions. Background: The Hertzsprung-Russell Diagram is actually an elabo ...
... 1. Using the data in the table, plot the location of each star and label it with its name. 2. Complete the data table based on the location of the star on the HR Diagram. 3. Color the columns of the HR Diagram. 4. Answer the questions. Background: The Hertzsprung-Russell Diagram is actually an elabo ...
20.1 Notes
... If the core that remains after a supernova has a mass of 1.4 – 3 solar masses it becomes a _______________ star, a very dense star that is a source of pulsating radio waves called _____________. ...
... If the core that remains after a supernova has a mass of 1.4 – 3 solar masses it becomes a _______________ star, a very dense star that is a source of pulsating radio waves called _____________. ...
Stellar Evolution
... • If the core’s mass is even greater/denser than a neutron star, it collapses. • Surface gravity is so great that no matter can escape it…not even electromagnetic ...
... • If the core’s mass is even greater/denser than a neutron star, it collapses. • Surface gravity is so great that no matter can escape it…not even electromagnetic ...
Montage of Jupiter and the Galilean satellites
... changing magnetic field. Pictured above is a solar prominence that erupted on May 15, throwing electrons and ions out into the Solar System. The image was taken in the ultraviolet light emitted by a specific type of ionized helium , a common element on the Sun. Particularly hot areas appear in white ...
... changing magnetic field. Pictured above is a solar prominence that erupted on May 15, throwing electrons and ions out into the Solar System. The image was taken in the ultraviolet light emitted by a specific type of ionized helium , a common element on the Sun. Particularly hot areas appear in white ...
printer-friendly sample test questions
... Based on apparent magnitude, the Sun is the brightest star (-26.40) and Deneb is the dimmest star (1.25). Absolute magnitude shows Rigel to be the brightest star (-8.61) and the Sun to be the dimmest star (4.80). Brightness of stars is traditionally expressed as magnitude. The more negative the valu ...
... Based on apparent magnitude, the Sun is the brightest star (-26.40) and Deneb is the dimmest star (1.25). Absolute magnitude shows Rigel to be the brightest star (-8.61) and the Sun to be the dimmest star (4.80). Brightness of stars is traditionally expressed as magnitude. The more negative the valu ...
STARS
... • A star is a massive, luminous ball of plasma. • The nearest star to Earth is the Sun, which is the source of most of the energy on Earth. • Stars are big exploding balls of gas, that are mostly hydrogen and helium. • A star begins as a collapsing cloud of material composed primarily of hydrogen, a ...
... • A star is a massive, luminous ball of plasma. • The nearest star to Earth is the Sun, which is the source of most of the energy on Earth. • Stars are big exploding balls of gas, that are mostly hydrogen and helium. • A star begins as a collapsing cloud of material composed primarily of hydrogen, a ...
Stars and Galaxies
... a star actually gives off. 12. The amount of light received on Earth is ____________________________. 13. A star that is actually dim can appear very bright if it is close to _______________. The opposite is true also. A star that’s actually bright can appear ____________ if it is far away. 14. ____ ...
... a star actually gives off. 12. The amount of light received on Earth is ____________________________. 13. A star that is actually dim can appear very bright if it is close to _______________. The opposite is true also. A star that’s actually bright can appear ____________ if it is far away. 14. ____ ...
Stars
... • Suppose you see two stars of the same apparent magnitude. If one star is actually four times as far away as the other, how much brighter would the farther star really be? ...
... • Suppose you see two stars of the same apparent magnitude. If one star is actually four times as far away as the other, how much brighter would the farther star really be? ...
AST 207 Homework 5 Due 14 October 2011
... 2. Life on Deneb. Here you will find out what it means to live near a giant like Deneb. Recall that the luminosity of a star, where T is its temperature and R is its radius. Star ...
... 2. Life on Deneb. Here you will find out what it means to live near a giant like Deneb. Recall that the luminosity of a star, where T is its temperature and R is its radius. Star ...
Chapter 16 Lesson 2: What is a Star
... Ribbons of gas called prominence leap out of the chromosphere that can also erupt like a volcano. 1. This is a solar flare which can last for minutes or hours. V. The Life of Stars a. New stars form in a nebula which is a cloud of dust and gas pulled together by gravity. 1. The temperature rises, hy ...
... Ribbons of gas called prominence leap out of the chromosphere that can also erupt like a volcano. 1. This is a solar flare which can last for minutes or hours. V. The Life of Stars a. New stars form in a nebula which is a cloud of dust and gas pulled together by gravity. 1. The temperature rises, hy ...
Star Maps and Constellations
... chases the bears (Ursa Major, Ursa Minor) around in circles, i.e. keeps them at the North pole ...
... chases the bears (Ursa Major, Ursa Minor) around in circles, i.e. keeps them at the North pole ...
Life Cycle of a Star
... absolute magnitude Used to study the lives of stars Most stars lie along the main sequence portion of the diagram ...
... absolute magnitude Used to study the lives of stars Most stars lie along the main sequence portion of the diagram ...
Corona Australis
Corona Australis /kɵˈroʊnə ɒˈstreɪlɨs/ or Corona Austrina /kɵˈroʊnə ɒˈstraɪnə/ is a constellation in the Southern Celestial Hemisphere. Its Latin name means ""southern crown"", and it is the southern counterpart of Corona Borealis, the northern crown. One of the 48 constellations listed by the 2nd-century astronomer Ptolemy, it remains one of the 88 modern constellations. The Ancient Greeks saw Corona Australis as a wreath rather than a crown and associated it with Sagittarius or Centaurus. Other cultures have likened the pattern to a turtle, ostrich nest, a tent, or even a hut belonging to a rock hyrax.Although fainter than its namesake, the oval- or horseshoe-shaped pattern of its brighter stars renders it distinctive. Alpha and Beta Coronae Australis are the two brightest stars with an apparent magnitude of around 4.1. Epsilon Coronae Australis is the brightest example of a W Ursae Majoris variable in the southern sky. Lying alongside the Milky Way, Corona Australis contains one of the closest star-forming regions to our Solar System—a dusty dark nebula known as the Corona Australis Molecular Cloud, lying about 430 light years away. Within it are stars at the earliest stages of their lifespan. The variable stars R and TY Coronae Australis light up parts of the nebula, which varies in brightness accordingly.