May 2015 - Hermanus Astronomy
... however, is a late ‘boomer’. The Milky Way’s star-birthing frenzy peaked 10 billion years ago, but our Sun was late for the party, not forming until roughly 5 billion years ago. By that time, the star formation rate in our galaxy had plunged to a trickle. Missing the party, however, may not have bee ...
... however, is a late ‘boomer’. The Milky Way’s star-birthing frenzy peaked 10 billion years ago, but our Sun was late for the party, not forming until roughly 5 billion years ago. By that time, the star formation rate in our galaxy had plunged to a trickle. Missing the party, however, may not have bee ...
ISP205-2 Visions of the Universe
... The Solar System • Sun • 9 planets (8 planets?) • 65+ moons • comets • asteroids • dust • gas • cosmic rays ...
... The Solar System • Sun • 9 planets (8 planets?) • 65+ moons • comets • asteroids • dust • gas • cosmic rays ...
00:00 [Narrator] 1. The Milky Way galaxy is our cosmic home. But it
... analysis of published data from Hubble and other telescopes. They have concluded that the previous estimate of the number of galaxies within the observable Universe is at least ten times too low! They think that some 90% of the galaxies in the Universe are actually too faint and too far away to be o ...
... analysis of published data from Hubble and other telescopes. They have concluded that the previous estimate of the number of galaxies within the observable Universe is at least ten times too low! They think that some 90% of the galaxies in the Universe are actually too faint and too far away to be o ...
ASTRO 1050 The Structure of the Milky Way Galaxy
... (a) Using the globular cluster data above, make a histogram of the data, drawing the same type of graph that you used previously. ...
... (a) Using the globular cluster data above, make a histogram of the data, drawing the same type of graph that you used previously. ...
Module1: Scale of the Universe
... Ask&your&students&to&discuss&some&possible&difBiculties&of&measuring&cosmic& distances&using¶llax.&Ensure&they&mention&the&following&points:& Parallax&shifts&are&always&small.&& Parallax&shift&is&even&smaller&than&the&apparent&size&of&the&star.&In&additional,& starlight&is&refracted&by&Earth's&a ...
... Ask&your&students&to&discuss&some&possible&difBiculties&of&measuring&cosmic& distances&using¶llax.&Ensure&they&mention&the&following&points:& Parallax&shifts&are&always&small.&& Parallax&shift&is&even&smaller&than&the&apparent&size&of&the&star.&In&additional,& starlight&is&refracted&by&Earth's&a ...
ASTR 1120-001 Final Examination Phil Armitage, Bruce Ferguson
... (a) X-ray emitting gas that is cooler, and galaxy velocities that are lower, than expected if there were no dark matter (b) X-ray emitting gas that is hotter, and galaxy velocities that are higher, than expected if there were no dark matter (c) X-ray emitting gas that is cooler, and galaxy velocitie ...
... (a) X-ray emitting gas that is cooler, and galaxy velocities that are lower, than expected if there were no dark matter (b) X-ray emitting gas that is hotter, and galaxy velocities that are higher, than expected if there were no dark matter (c) X-ray emitting gas that is cooler, and galaxy velocitie ...
Galaxies - University of Iowa Astrophysics
... Distances to galaxies Standard candles, such as Cepheid variables, the most luminous supergiants, globular clusters, H II regions, and Type Ia supernovae in a galaxy, are used in estimating intergalactic distances. Type Ia supernovae do not all have the same luminosity, but there is a relationship ...
... Distances to galaxies Standard candles, such as Cepheid variables, the most luminous supergiants, globular clusters, H II regions, and Type Ia supernovae in a galaxy, are used in estimating intergalactic distances. Type Ia supernovae do not all have the same luminosity, but there is a relationship ...
here - Tenafly Middle School
... • These small stars are located on the lower left of the H-R diagram and are called white dwarfs. • Other stars are extremely bright but not hot. • These large stars on the upper right of the H-R diagram are called giants, red giants, or super red giants because they are usually red in color. ...
... • These small stars are located on the lower left of the H-R diagram and are called white dwarfs. • Other stars are extremely bright but not hot. • These large stars on the upper right of the H-R diagram are called giants, red giants, or super red giants because they are usually red in color. ...
Stars and Constellations
... Scientists measure absolute magnitude by determining what brightness (or apparent magnitude) a star would have if it were placed exactly 10 parsecs from Earth. A parsec is a distance of 3.26 light years. Ancient as well as modern stargazers, such as the Navajo, identified groups or patterns of stars ...
... Scientists measure absolute magnitude by determining what brightness (or apparent magnitude) a star would have if it were placed exactly 10 parsecs from Earth. A parsec is a distance of 3.26 light years. Ancient as well as modern stargazers, such as the Navajo, identified groups or patterns of stars ...
Research Powerpoint - Department of Astronomy
... right, comet Lulin, seen with Swift’s Xray (red) and UV (blue) telescopes. Comets glow in X-ray when the solar wind flows through the neutral gas (as seen here in UV). ...
... right, comet Lulin, seen with Swift’s Xray (red) and UV (blue) telescopes. Comets glow in X-ray when the solar wind flows through the neutral gas (as seen here in UV). ...
Study Guide for Quiz #2
... Look Back Time Local Group Hubble Deep Field Can you answer these key questions? What are the strengths and weaknesses of the various distance determination methods? How is a standard candle used to determine distance? Why do Type Ia supernova make good standard candles? How is red shift related to ...
... Look Back Time Local Group Hubble Deep Field Can you answer these key questions? What are the strengths and weaknesses of the various distance determination methods? How is a standard candle used to determine distance? Why do Type Ia supernova make good standard candles? How is red shift related to ...
Lab Writeup
... The most basic astronomical instrument is the telescope. A telescope collects light from and magnifies an astronomical object. Until the end of the 19th century, all observational work in astronomy was based on observations made at the eyepiece of a telescope. Nowadays, even though astronomical rese ...
... The most basic astronomical instrument is the telescope. A telescope collects light from and magnifies an astronomical object. Until the end of the 19th century, all observational work in astronomy was based on observations made at the eyepiece of a telescope. Nowadays, even though astronomical rese ...
Measurement of Mercury Distance, by
... 1. A member of the Astronomy Society of IRAN, 15875-3671, Iran 2. A member of Astronomy Center of Rey, Shahre Rey, Tehran, 1876943116, Iran 3. Student of physics Payame noor University (PNU), Tehran, 19395-3697, Iran Abstract: We will measure the distance between the Sun and the Moon by considering ...
... 1. A member of the Astronomy Society of IRAN, 15875-3671, Iran 2. A member of Astronomy Center of Rey, Shahre Rey, Tehran, 1876943116, Iran 3. Student of physics Payame noor University (PNU), Tehran, 19395-3697, Iran Abstract: We will measure the distance between the Sun and the Moon by considering ...
Some Facts and Hypotheses regard
... varies with the brightness of the star, and hence its brightness can be measured. There is one drawback to this method, namely, its greater liability to error due to the uncertainties of the atmosphere. Hence it is still necessary to check the state of the atmosphere first of all by observing the er ...
... varies with the brightness of the star, and hence its brightness can be measured. There is one drawback to this method, namely, its greater liability to error due to the uncertainties of the atmosphere. Hence it is still necessary to check the state of the atmosphere first of all by observing the er ...
click here
... • Stars of given type of spectrum and the same colors have the same absolute magnitude (99.9%) • Stars have different apparent magnitudes depending on their distance. • Stars behind dust clouds look redder than they are intrinsically, so… m-M=5 log d1 –5+ A(l) (i.e., the star looks fainter) ...
... • Stars of given type of spectrum and the same colors have the same absolute magnitude (99.9%) • Stars have different apparent magnitudes depending on their distance. • Stars behind dust clouds look redder than they are intrinsically, so… m-M=5 log d1 –5+ A(l) (i.e., the star looks fainter) ...
The Hertzsprung-Russell Diagram
... 9. Label the following steps on your H-R diagram to show the series of changes that our sun has undergone since its formation 4.6 billion years ago. a. Originally, a big cloud of gas and dust called a nebula condensed to form a young, cool star called a red dwarf. In this first stage of life, our s ...
... 9. Label the following steps on your H-R diagram to show the series of changes that our sun has undergone since its formation 4.6 billion years ago. a. Originally, a big cloud of gas and dust called a nebula condensed to form a young, cool star called a red dwarf. In this first stage of life, our s ...
The Sun: Source of heat and light
... Note that in scientific notation the aim is to present the number as a number between 1 and 10 multiplied by a power of ten: 6.0001 x 10-5 ...
... Note that in scientific notation the aim is to present the number as a number between 1 and 10 multiplied by a power of ten: 6.0001 x 10-5 ...
Powerpoint Presentation (large file)
... Elliptical galaxies are nearly devoid of interstellar gas and dust, and so star formation is severely inhibited ...
... Elliptical galaxies are nearly devoid of interstellar gas and dust, and so star formation is severely inhibited ...
Galaxies Chapter Twenty
... Elliptical galaxies are nearly devoid of interstellar gas and dust, and so star formation is severely inhibited ...
... Elliptical galaxies are nearly devoid of interstellar gas and dust, and so star formation is severely inhibited ...
Document
... Elliptical galaxies are nearly devoid of interstellar gas and dust, and so star formation is severely inhibited ...
... Elliptical galaxies are nearly devoid of interstellar gas and dust, and so star formation is severely inhibited ...
How Bright is that star?
... The luminosity of a star depends on two things The surface area (A) of the Star… bigger stars are brighter because there is more area to shine. And The luminosity (l ) of a square meter of surface area. L = Al ...
... The luminosity of a star depends on two things The surface area (A) of the Star… bigger stars are brighter because there is more area to shine. And The luminosity (l ) of a square meter of surface area. L = Al ...
Supernova Stalking - Susanna Kumlien Reportage
... the Stockholm team. The discovery made world news, and the eager reader of Loft Bookazine may recall a tidbit on the topic (Volume 1, 2014). The supernova in the galaxy of M82, also known as the Cigar Nebula, proved to be a Type 1a-supernova, a so-called Standard Candle. A Standard Candle is an obje ...
... the Stockholm team. The discovery made world news, and the eager reader of Loft Bookazine may recall a tidbit on the topic (Volume 1, 2014). The supernova in the galaxy of M82, also known as the Cigar Nebula, proved to be a Type 1a-supernova, a so-called Standard Candle. A Standard Candle is an obje ...
Galaxy Classification - Starry Night Education
... Q uestion 7: Which statement best describes the geometry of the solar system's location within the Milky Way galaxy? a. The plane of the solar system is coincident with the plane of the galaxy. b. The plane of the solar system is perpendicular to that of the Milky Way. c. The plane of the solar syst ...
... Q uestion 7: Which statement best describes the geometry of the solar system's location within the Milky Way galaxy? a. The plane of the solar system is coincident with the plane of the galaxy. b. The plane of the solar system is perpendicular to that of the Milky Way. c. The plane of the solar syst ...
AST1100 Lecture Notes
... By measuring the Doppler effect, we can estimate the velocity of stars orbiting a galaxy at different distances r from the center. A huge number of observations show that the galactic rotation curve, the curve showing the orbital velocity as a function of distance r, is almost √ flat for large r for ...
... By measuring the Doppler effect, we can estimate the velocity of stars orbiting a galaxy at different distances r from the center. A huge number of observations show that the galactic rotation curve, the curve showing the orbital velocity as a function of distance r, is almost √ flat for large r for ...
Exploring The Universe
... • Quasars may be infant galaxies. • In 1960, a faint object was matched with a strong radio signal. This object was called a quasar. • quasar quasi-stellar radio sources; very luminous objects that produce energy at a high rate and that are thought to be the most distant objects in the universe • Ea ...
... • Quasars may be infant galaxies. • In 1960, a faint object was matched with a strong radio signal. This object was called a quasar. • quasar quasi-stellar radio sources; very luminous objects that produce energy at a high rate and that are thought to be the most distant objects in the universe • Ea ...
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.