![Study Notes for Chapter 30: Stars, Galaxies, and the Universe](http://s1.studyres.com/store/data/011278249_1-7f448e8757408ca5bd33e80f5a1a3113-300x300.png)
Study Notes for Chapter 30: Stars, Galaxies, and the Universe
... 7. A white dwarf is a hot, extremely dense core of matter left after a star collapses. 8. About 6,000 stars are visible from Earth without a telescope. 9. Absolute magnitude is the true brightness of a star. 10. After its temperature rises to 10,000,000°C, a protostar becomes a star when nuclear fus ...
... 7. A white dwarf is a hot, extremely dense core of matter left after a star collapses. 8. About 6,000 stars are visible from Earth without a telescope. 9. Absolute magnitude is the true brightness of a star. 10. After its temperature rises to 10,000,000°C, a protostar becomes a star when nuclear fus ...
Characteristics of Stars
... greatest distance that astronomers can use to measure the distances to stars using the parallax method? 4. In relation to the brightness of other stars how bright is the Sun? What are the three characteristics astronomers use to classify stars? 5. What size is the Sun compared to other stars? What a ...
... greatest distance that astronomers can use to measure the distances to stars using the parallax method? 4. In relation to the brightness of other stars how bright is the Sun? What are the three characteristics astronomers use to classify stars? 5. What size is the Sun compared to other stars? What a ...
The Runaway Universe - Astronomy & Astrophysics Group
... whatever part of it the telescope is directed, a vast crowd of stars is immediately presented to view. Many of them are rather large and quite bright, while the number of smaller ones is quite beyond calculation.” from The Starry Messenger (1610) ...
... whatever part of it the telescope is directed, a vast crowd of stars is immediately presented to view. Many of them are rather large and quite bright, while the number of smaller ones is quite beyond calculation.” from The Starry Messenger (1610) ...
Topic 4 Assignment - Science 9 Portfolio
... atmosphere on the image. A deforming mirror in the light path of the telescope maintains a pointlike image of the celestial body using either a real star or a laser beam as a reference. Triangulation- the process of determining the location of a point by measuring angles to it from known points at e ...
... atmosphere on the image. A deforming mirror in the light path of the telescope maintains a pointlike image of the celestial body using either a real star or a laser beam as a reference. Triangulation- the process of determining the location of a point by measuring angles to it from known points at e ...
Slide 1 - Physics @ IUPUI
... period of pulsation and their absolute brightness. • The longer the period, the bigger the star is, and the brighter it is (sort of like a bigger bell has a larger period of vibration). • This allows us to measure distances (especially since these are very bright stars which can be seen a LONG dista ...
... period of pulsation and their absolute brightness. • The longer the period, the bigger the star is, and the brighter it is (sort of like a bigger bell has a larger period of vibration). • This allows us to measure distances (especially since these are very bright stars which can be seen a LONG dista ...
Lecture5 - Tufts Institute of Cosmology
... What is special about Novae? Get distances to “nebulae” Can figure out their luminosity at maximum brightness (M) Measure brightness (m) Get distance modulus (m-M) ==> Get distance! ...
... What is special about Novae? Get distances to “nebulae” Can figure out their luminosity at maximum brightness (M) Measure brightness (m) Get distance modulus (m-M) ==> Get distance! ...
How far away are the Stars?
... • First mark position A directly opposite tree. • Move a known distance along the ‘baseline’. • Measure ABC • Deduce unknown distance via trigonometry ...
... • First mark position A directly opposite tree. • Move a known distance along the ‘baseline’. • Measure ABC • Deduce unknown distance via trigonometry ...
Study Notes for Chapter 30:
... Hubble’s discovery that there was ____ shift in the spectra of galaxies lead to an understanding that the universe is ____. ...
... Hubble’s discovery that there was ____ shift in the spectra of galaxies lead to an understanding that the universe is ____. ...
Study Notes for Chapter 30:
... Hubble’s discovery that there was ____ shift in the spectra of galaxies lead to an understanding that the universe is ____. ...
... Hubble’s discovery that there was ____ shift in the spectra of galaxies lead to an understanding that the universe is ____. ...
16-6 How do astronomers measure distance?
... ____________________ 3. An astronomical unit is equal to the distance between Earth and the Moon. ____________________ 4. Proxima Centauri is the closest star to Earth other than the Sun. ____________________ 5. A light-year is a smaller unit than an astronomical unit. ____________________ 6. The di ...
... ____________________ 3. An astronomical unit is equal to the distance between Earth and the Moon. ____________________ 4. Proxima Centauri is the closest star to Earth other than the Sun. ____________________ 5. A light-year is a smaller unit than an astronomical unit. ____________________ 6. The di ...
Solar System Bead Distance Activity
... Our Solar System is immense in size by normal standards. We think of the planets as revolving around the Sun, but rarely consider how far each planet is from the Sun. Furthermore, we fail to appreciate the even greater distances to the other stars. Astronomers use the distance from the Sun to the Ea ...
... Our Solar System is immense in size by normal standards. We think of the planets as revolving around the Sun, but rarely consider how far each planet is from the Sun. Furthermore, we fail to appreciate the even greater distances to the other stars. Astronomers use the distance from the Sun to the Ea ...
Lecture 10: Stars
... & Your left eye is the Earth in January & Your right eye is the Earth in June Watch the apparent motion of your thumb against a distant reference point (repeat at arm’s length) Which “move” more -- closer or farther objects? ...
... & Your left eye is the Earth in January & Your right eye is the Earth in June Watch the apparent motion of your thumb against a distant reference point (repeat at arm’s length) Which “move” more -- closer or farther objects? ...
ASTR2050 Spring 2005 • In this class we will ...
... Various types of binary stars. Doppler shifts give velocity Orbital mechanics give the masses of the two stars Eclipses allow determination of individual stellar radii See Studio Laboratory this Friday ...
... Various types of binary stars. Doppler shifts give velocity Orbital mechanics give the masses of the two stars Eclipses allow determination of individual stellar radii See Studio Laboratory this Friday ...
Distance measurement in astronomy
... Henrietta Leavitt of Harvard College observatory discovered an important connection between the period and brightness. This is now known as the period-luminosity relationship. The longer the period of luminosity variation the more luminous the star. ...
... Henrietta Leavitt of Harvard College observatory discovered an important connection between the period and brightness. This is now known as the period-luminosity relationship. The longer the period of luminosity variation the more luminous the star. ...
Distances to the Stars in Leo
... The student determines the distances to seven of the brightest stars in the constellation Leo using the method of spectroscopic parallax and compares the results to the more accurate distances derived from measured trigonometric parallaxes. Background and Theory If the distance to the star is known ...
... The student determines the distances to seven of the brightest stars in the constellation Leo using the method of spectroscopic parallax and compares the results to the more accurate distances derived from measured trigonometric parallaxes. Background and Theory If the distance to the star is known ...
Astronomy pt. 2
... D. Classification • 1. H. R. diagram (Hertzsprung – Russell) • 2. Classifies by surface temperature and absolute magnitude. • 3. Main sequence stars- stars of similar composition and size – A. “average” stars ...
... D. Classification • 1. H. R. diagram (Hertzsprung – Russell) • 2. Classifies by surface temperature and absolute magnitude. • 3. Main sequence stars- stars of similar composition and size – A. “average” stars ...
How Do Astronomers Measure the Brightness of a Star?
... Early peoples observed bright stars and grouped them into constellations (88) Ancient Greeks established classification system based on star brightness ...
... Early peoples observed bright stars and grouped them into constellations (88) Ancient Greeks established classification system based on star brightness ...
Lecture notes -- pdf file - University of Iowa Astrophysics
... How far away are the nearest stars? Last time: • Distances to stars can be measured via measurement of parallax (trigonometric parallax, stellar parallax) • Defined two units to be used in describing stellar distances (parsec and light year) ...
... How far away are the nearest stars? Last time: • Distances to stars can be measured via measurement of parallax (trigonometric parallax, stellar parallax) • Defined two units to be used in describing stellar distances (parsec and light year) ...
Option: Astrophysics Objects in the Universe: Asteroid: a small rocky
... o The hotter the black body, the more energy emitted per unit area for all wavelengths ...
... o The hotter the black body, the more energy emitted per unit area for all wavelengths ...
Astronomy Study Guide
... Apparent brightness—the brightness of a star as seen from Earth Absolute brightness—a star’s brightness as if it were a standard distance from Earth Constellation—an imaginary pattern of stars (example—Orion) Hertzsprung - Russell diagram (H-R diagram)—a graph of stars showing surface temperature on ...
... Apparent brightness—the brightness of a star as seen from Earth Absolute brightness—a star’s brightness as if it were a standard distance from Earth Constellation—an imaginary pattern of stars (example—Orion) Hertzsprung - Russell diagram (H-R diagram)—a graph of stars showing surface temperature on ...
Cosmic distance ladder
The cosmic distance ladder (also known as the extragalactic distance scale) is the succession of methods by which astronomers determine the distances to celestial objects. A real direct distance measurement of an astronomical object is possible only for those objects that are ""close enough"" (within about a thousand parsecs) to Earth. The techniques for determining distances to more distant objects are all based on various measured correlations between methods that work at close distances and methods that work at larger distances. Several methods rely on a standard candle, which is an astronomical object that has a known luminosity.The ladder analogy arises because no one technique can measure distances at all ranges encountered in astronomy. Instead, one method can be used to measure nearby distances, a second can be used to measure nearby to intermediate distances, and so on. Each rung of the ladder provides information that can be used to determine the distances at the next higher rung.