70 Thousand Million, Million, Million Stars in Space
... This was not such a problem for astronomers in the past, who began mapping the universe from what they could see with the naked eye. In the 1600s, the invention of the telescope meant that astronomers could see three to four times farther into space. ...
... This was not such a problem for astronomers in the past, who began mapping the universe from what they could see with the naked eye. In the 1600s, the invention of the telescope meant that astronomers could see three to four times farther into space. ...
Correct answers shown in boldface. Be sure to write your name and
... a. results in broadening the spectral lines from active nuclei in the cluster b. causes the cluster to glow all over as things fall into it c. makes the emission lines of the galaxies in the cluster shift wavelength significantly due to relativity d. is almost all concentrated in its giant central g ...
... a. results in broadening the spectral lines from active nuclei in the cluster b. causes the cluster to glow all over as things fall into it c. makes the emission lines of the galaxies in the cluster shift wavelength significantly due to relativity d. is almost all concentrated in its giant central g ...
AST 207 Test 3 23 November 2009
... a. (1 pt.) At the present time, does the value of Hubble’s constant depend on the galaxy in which the observations are made? (2 pts.) Explain your reasoning. b. Simplicio erroneously believes that everything in the universe is expanding according to Hubble’s Law. At an earlier time, everything did o ...
... a. (1 pt.) At the present time, does the value of Hubble’s constant depend on the galaxy in which the observations are made? (2 pts.) Explain your reasoning. b. Simplicio erroneously believes that everything in the universe is expanding according to Hubble’s Law. At an earlier time, everything did o ...
Worksheet
... universe is expanding and laid the foundations for the Big Bang theory, which states that the universe exploded into existence from a single point or a very small region in time and space and has been expanding ever since. Just after the Big Bang, temperatures were so high that particle pairs could ...
... universe is expanding and laid the foundations for the Big Bang theory, which states that the universe exploded into existence from a single point or a very small region in time and space and has been expanding ever since. Just after the Big Bang, temperatures were so high that particle pairs could ...
Chapter 20. Galaxies
... ellipticals showing the largest range. Giant ellipticals, often found near the centers of large clusters of galaxies, can have masses of around 1013 solar masses, while dwarf ellipticals may be 10 million times less massive. Spirals show a somewhat smaller range of masses from perhaps 1012 solar mas ...
... ellipticals showing the largest range. Giant ellipticals, often found near the centers of large clusters of galaxies, can have masses of around 1013 solar masses, while dwarf ellipticals may be 10 million times less massive. Spirals show a somewhat smaller range of masses from perhaps 1012 solar mas ...
The Classification of Galaxies By Daniel Underwood Contents The
... accepted by astronomers that there were other galaxies than our own in the cosmos. However, it wasn’t immediately recognised that these nebulae were actually galaxies like our own, it took time to realise that they weren’t gaseous, but actually massive collections of stars. These masses outside the ...
... accepted by astronomers that there were other galaxies than our own in the cosmos. However, it wasn’t immediately recognised that these nebulae were actually galaxies like our own, it took time to realise that they weren’t gaseous, but actually massive collections of stars. These masses outside the ...
The Milky Way Galaxy (ch. 23)
... There are two kinds of variable stars (their apparent brightness varies periodically because they are pulsating) that are used as “standard candles” for distance estimates: a. RR Lyrae stars—all have similar light curves, periods 0.5 to 1 day (23.5), and all have approximately the same luminosity! ( ...
... There are two kinds of variable stars (their apparent brightness varies periodically because they are pulsating) that are used as “standard candles” for distance estimates: a. RR Lyrae stars—all have similar light curves, periods 0.5 to 1 day (23.5), and all have approximately the same luminosity! ( ...
Conference Summary Richard Ellis (Caltech) ITALIA
... extended SF histories was an early prediction of CDM models matching optical data only ...
... extended SF histories was an early prediction of CDM models matching optical data only ...
hubble_refurb
... The Hubble Space Telescope’s newly repaired Advanced Camera for Surveys (ACS) has peered nearly 5 billion light years away to resolve intricate details in the galaxy cluster Abell 370. Abell 370 is one of the very first galaxy clusters where astronomers observed the phenomenon of gravitational lens ...
... The Hubble Space Telescope’s newly repaired Advanced Camera for Surveys (ACS) has peered nearly 5 billion light years away to resolve intricate details in the galaxy cluster Abell 370. Abell 370 is one of the very first galaxy clusters where astronomers observed the phenomenon of gravitational lens ...
Handout from Allaire Star Party
... Open clusters are also clusters of stars, but they are much smaller and younger than globular clusters. A typical open cluster might contain anywhere from less than 10 to more than 10,000 stars in an area about 50-100 light years across. When comparing these to globular clusters, which can have over ...
... Open clusters are also clusters of stars, but they are much smaller and younger than globular clusters. A typical open cluster might contain anywhere from less than 10 to more than 10,000 stars in an area about 50-100 light years across. When comparing these to globular clusters, which can have over ...
Galaxies - science9atsouthcarletonhs
... The LMC is about 60,000 light years across. The bright reddish feature in the upper right is the “Tarantula Nebula” a region of star formation in the LMC. (NOAO/AURA Photo) ...
... The LMC is about 60,000 light years across. The bright reddish feature in the upper right is the “Tarantula Nebula” a region of star formation in the LMC. (NOAO/AURA Photo) ...
The Galaxy–Dark Matter Connection
... Perhaps the most natural one is starvation (or strangulation): Infalling gas is mainly accreted by the central galaxy. Satellites galaxies (slowly) starve. This is the only environmental process currently included in semi-analytical models. Is this good enough? What about the morphology-density rela ...
... Perhaps the most natural one is starvation (or strangulation): Infalling gas is mainly accreted by the central galaxy. Satellites galaxies (slowly) starve. This is the only environmental process currently included in semi-analytical models. Is this good enough? What about the morphology-density rela ...
How Old is the Universe?
... 271, 957) apply this technique to globular clusters and find that the age of the Universe is greater than 12.07 Gyr with 95% confidence. They say the age is proportional to one over the luminosity of the RR Lyra stars which are used to determine the distances to globular clusters. Chaboyer (1997) gi ...
... 271, 957) apply this technique to globular clusters and find that the age of the Universe is greater than 12.07 Gyr with 95% confidence. They say the age is proportional to one over the luminosity of the RR Lyra stars which are used to determine the distances to globular clusters. Chaboyer (1997) gi ...
Earth in the Universe Answer each in your binder or notebook. Date
... Which statement about stars is not accurate? A. A small group of stars is called a galaxy. B. Stars consist mainly of hydrogen and helium. C. Types of stars include red giants, super giants, and dwarf stars. D. Constellations of stars are found in different places in the sky. ...
... Which statement about stars is not accurate? A. A small group of stars is called a galaxy. B. Stars consist mainly of hydrogen and helium. C. Types of stars include red giants, super giants, and dwarf stars. D. Constellations of stars are found in different places in the sky. ...
File
... determines how fast the cloud will form a disk before it is completely turned into stars Protogalactic cooling…the initial density determines how fast the cloud can form stars before it collapses ...
... determines how fast the cloud will form a disk before it is completely turned into stars Protogalactic cooling…the initial density determines how fast the cloud can form stars before it collapses ...
How do the most massive galaxies constrain theories of
... visible for ~250 Myr every luminous E has had ~0.5-1 dry merger since z~1 in good agreement with expectations from hierarchical models ...
... visible for ~250 Myr every luminous E has had ~0.5-1 dry merger since z~1 in good agreement with expectations from hierarchical models ...
A Universe of Galaxies - Pennsylvania State University
... away from us at more than 90% of the speed of light. Stars in the Milky Way cannot move that fast. The only way to achieve such a high speed is if they are incredibly far away. They are therefore incredibly bright – as bright as 1000 supernovae, and much brighter than galaxies like the Milky Way. ...
... away from us at more than 90% of the speed of light. Stars in the Milky Way cannot move that fast. The only way to achieve such a high speed is if they are incredibly far away. They are therefore incredibly bright – as bright as 1000 supernovae, and much brighter than galaxies like the Milky Way. ...
Solutions - faculty.ucmerced.edu
... Solution (a) There are two Doppler shifts in this problem, one from the redshift z, and the other from the rotational motion of the galaxy. The redshift from the galaxy shifts the wavelength λobs = 1 + z = 1.9. λemit Thus, the observed wavelength to the center of the galaxy is λobs = (1 + z) λemit = ...
... Solution (a) There are two Doppler shifts in this problem, one from the redshift z, and the other from the rotational motion of the galaxy. The redshift from the galaxy shifts the wavelength λobs = 1 + z = 1.9. λemit Thus, the observed wavelength to the center of the galaxy is λobs = (1 + z) λemit = ...
Document
... • A main sequence star emits most of its energy at a wavelength of 2.4x10^-7m. It’s apparent brightness is measured to be 4.3x10^-9 W/m^2. How far is the star? ...
... • A main sequence star emits most of its energy at a wavelength of 2.4x10^-7m. It’s apparent brightness is measured to be 4.3x10^-9 W/m^2. How far is the star? ...
1. Put these objects in the correct order, from nearest
... Yes, the universe does not gain or lose mass or energy. Yes, although the universe continues to expand, what we can see the observable universe - stays the same size. C. No, we can see light from more distant parts of the universe today than we could have seen a few billion years ago. D. No, the obs ...
... Yes, the universe does not gain or lose mass or energy. Yes, although the universe continues to expand, what we can see the observable universe - stays the same size. C. No, we can see light from more distant parts of the universe today than we could have seen a few billion years ago. D. No, the obs ...
SpfFin - Academic Program Pages
... Neutrinos, which are very abundant even if they have very little rest mass and are very difficult to detect. Dark energy, which generates no gravitational effects and emits no radiation. Antimatter, which generates a negative gravitational effect and will be detected only if it meets matter and is a ...
... Neutrinos, which are very abundant even if they have very little rest mass and are very difficult to detect. Dark energy, which generates no gravitational effects and emits no radiation. Antimatter, which generates a negative gravitational effect and will be detected only if it meets matter and is a ...
Cosmic Particle Accelerator - Max-Planck
... Astronomers know of types of galaxies that could be responsible: quasars, radio galaxies and blazars. The supermassive black holes at their centers can be as heavy as several billion solar masses and collect vast amounts of gas and dust – sometimes even entire stars – from their surroundings. This r ...
... Astronomers know of types of galaxies that could be responsible: quasars, radio galaxies and blazars. The supermassive black holes at their centers can be as heavy as several billion solar masses and collect vast amounts of gas and dust – sometimes even entire stars – from their surroundings. This r ...
Rhodri Evans - LA Flood Project
... This book traces the history of our understanding of the Universe, from the early ideas of the Greeks through to the latest findings announced in the last few weeks which probe the conditions in the very earliest moments of our Universe’s existence. After laying down the evidence that our Earth is n ...
... This book traces the history of our understanding of the Universe, from the early ideas of the Greeks through to the latest findings announced in the last few weeks which probe the conditions in the very earliest moments of our Universe’s existence. After laying down the evidence that our Earth is n ...
color-stellar mass diagram
... redshift, we see cosmic epochs of vigorous star formation portion of the Hubble Deep Field galaxies appear more irregular than present day galaxies we see them through the light emitted in UV by the young stars but in UV also nearby galaxies appear less regular ...
... redshift, we see cosmic epochs of vigorous star formation portion of the Hubble Deep Field galaxies appear more irregular than present day galaxies we see them through the light emitted in UV by the young stars but in UV also nearby galaxies appear less regular ...
The Hubble Redshift Distance Relation
... • The telescope is currently pointed at the Coma Berenices cluster. Use the “N”, “W”, “S”, “E” buttons to move the telescope until the central red box is centered on one of the galaxies (you can change how quickly the telescope moves - or slews - by clicking on the Slew Rate button). Next, click on ...
... • The telescope is currently pointed at the Coma Berenices cluster. Use the “N”, “W”, “S”, “E” buttons to move the telescope until the central red box is centered on one of the galaxies (you can change how quickly the telescope moves - or slews - by clicking on the Slew Rate button). Next, click on ...