"Star Tracks", Leaflet for Royal Society Summer Exhibition
... Galactic Archaeology: Archaeology: how can we learn about the history of the Galaxy? For instance, we would like to know where and when the Sun was born. An individual star experiences many different Galactic environments throughout its life. Spiral arms can cause stars to move from one orbit to ano ...
... Galactic Archaeology: Archaeology: how can we learn about the history of the Galaxy? For instance, we would like to know where and when the Sun was born. An individual star experiences many different Galactic environments throughout its life. Spiral arms can cause stars to move from one orbit to ano ...
The Interstellar Medium (ISM)
... Too cold (~100 K) to give optical emission lines. Primarily observed through radiation of H at wavelength of 21 cm. Accounts for almost half the mass in the ISM: about 2 x 109 MSun ! 21-cm emission map of IC 342 from VLA ...
... Too cold (~100 K) to give optical emission lines. Primarily observed through radiation of H at wavelength of 21 cm. Accounts for almost half the mass in the ISM: about 2 x 109 MSun ! 21-cm emission map of IC 342 from VLA ...
Chapter 3: the Sun - University of Waterloo
... • Viewing a galaxy edge-on, you see a dark lane where starlight is being absorbed by dust. ...
... • Viewing a galaxy edge-on, you see a dark lane where starlight is being absorbed by dust. ...
N(M)
... prob of spontaneous flip = 1 in few million yrs, (highly forbidden) but there is a lot of H! ...
... prob of spontaneous flip = 1 in few million yrs, (highly forbidden) but there is a lot of H! ...
Lecture 4: Molecular Clouds (1)
... because of the presence of a surrounding, more rarefied and warmer medium which prevents the internal (thermal) motion from dispersing the cloud. In giant molecular clouds, the main cohesive force is typically the cloud’s own gravity, while internal thermal pressure plays only a minor role in the ov ...
... because of the presence of a surrounding, more rarefied and warmer medium which prevents the internal (thermal) motion from dispersing the cloud. In giant molecular clouds, the main cohesive force is typically the cloud’s own gravity, while internal thermal pressure plays only a minor role in the ov ...
Ch. 27.3 Star Groups
... Patterns of stars in the sky, in which the stars are not necessarily close together. 88 constellations recognized by astronomers. Most don’t look like the figures they are named after. ...
... Patterns of stars in the sky, in which the stars are not necessarily close together. 88 constellations recognized by astronomers. Most don’t look like the figures they are named after. ...
Gravitational potential energy
... Gas in the galaxy should be wildly gravitationally unstable. It should convert all its mass into stars on a free-fall time scale: ...
... Gas in the galaxy should be wildly gravitationally unstable. It should convert all its mass into stars on a free-fall time scale: ...
Astronomy
... Directions: Answer the following questions with the most correct answers. TRUE/FALSE: 1. _____ Hubble classified galaxies 2. _____ There are three main classifications of galaxies 3. _____ Elliptical galaxies have little or no star formation 4. _____ Elliptical galaxies have little or no rotation 5. ...
... Directions: Answer the following questions with the most correct answers. TRUE/FALSE: 1. _____ Hubble classified galaxies 2. _____ There are three main classifications of galaxies 3. _____ Elliptical galaxies have little or no star formation 4. _____ Elliptical galaxies have little or no rotation 5. ...
The Milky Way Galaxy
... public discussion between astronomers as to whether the Milky Way contains all the stars in the universe. Cepheid variable stars are important in determining the distance to other galaxies. Edwin Hubble proved that there are other galaxies far outside of the Milky Way. ...
... public discussion between astronomers as to whether the Milky Way contains all the stars in the universe. Cepheid variable stars are important in determining the distance to other galaxies. Edwin Hubble proved that there are other galaxies far outside of the Milky Way. ...
ATNF Steering Committee – Astrophysics highlights
... extragalactic object using the Ammonia transition. Further observations of southern galaxies are planned. 4. A new spiral arm in the outer Milky Way Using data from the Southern Galactic Plane Survey (SGPS), McClure-Griffiths and collaborators have discovered a possible distant spiral arm in the fou ...
... extragalactic object using the Ammonia transition. Further observations of southern galaxies are planned. 4. A new spiral arm in the outer Milky Way Using data from the Southern Galactic Plane Survey (SGPS), McClure-Griffiths and collaborators have discovered a possible distant spiral arm in the fou ...
wdm_shanghai_Mayinzhe
... For m_X > 5keV, star formation efficiency is degenerated with WDM For low mass, the two are not degenerated. This is observable by the high-redshift measurement such as square kilometer array (2020). ...
... For m_X > 5keV, star formation efficiency is degenerated with WDM For low mass, the two are not degenerated. This is observable by the high-redshift measurement such as square kilometer array (2020). ...
Astronomy 1
... The Milky Way Galaxy, commonly referred to as just the Milky Way, or sometimes simply as the Galaxy,[a] is the home galaxy of the Solar System, and of Earth. It is agreed that the Milky Way is a spiral galaxy, with observations suggesting that it is a barred spiral galaxy. It contains 100-400 billio ...
... The Milky Way Galaxy, commonly referred to as just the Milky Way, or sometimes simply as the Galaxy,[a] is the home galaxy of the Solar System, and of Earth. It is agreed that the Milky Way is a spiral galaxy, with observations suggesting that it is a barred spiral galaxy. It contains 100-400 billio ...
Stellar populations and dynamics in the Milky Way galaxy
... in this sense meaning that the timescale for collapse is comparable to an orbital or a dynamical timescale, which is of the order of 108 years. It should be noted that Isobe (1974) came to the opposite conclusion from his analysis of the ELS data, and favoured a slow collapse, while Yoshii and Saio ...
... in this sense meaning that the timescale for collapse is comparable to an orbital or a dynamical timescale, which is of the order of 108 years. It should be noted that Isobe (1974) came to the opposite conclusion from his analysis of the ELS data, and favoured a slow collapse, while Yoshii and Saio ...
Is There a Ring Around Milky Way?
... If the mass and the radius of our Galaxy are 10-15% less than what we have assumed above, we get one orbit within the orbit of LMC which, of course, lies within the Roche limit, and without giving different picture may be interpreted to be the part of the ring structure along with other inner member ...
... If the mass and the radius of our Galaxy are 10-15% less than what we have assumed above, we get one orbit within the orbit of LMC which, of course, lies within the Roche limit, and without giving different picture may be interpreted to be the part of the ring structure along with other inner member ...
Slide 1
... Things are seen as they are since this is the best understood of all possible worlds Modulo variance. And physics. Of course galaxy formation models are correct. They have always been correct. Just different than they used to be. Models should be used to isolate and investigate what we do not unders ...
... Things are seen as they are since this is the best understood of all possible worlds Modulo variance. And physics. Of course galaxy formation models are correct. They have always been correct. Just different than they used to be. Models should be used to isolate and investigate what we do not unders ...
Messing Up a Galaxy
... stars themselves are very rare indeed. This is because the spaces between the stars in a galaxy are typically very large compared with the stars' sizes. In our region of space, the distance from the Sun to its nearest stellar neighbour is about 29 million times the Sun's diameter! Our Milky Way Gala ...
... stars themselves are very rare indeed. This is because the spaces between the stars in a galaxy are typically very large compared with the stars' sizes. In our region of space, the distance from the Sun to its nearest stellar neighbour is about 29 million times the Sun's diameter! Our Milky Way Gala ...
1117 Discussion Notes
... Your a is getting larger and larger, but the mass is not changing by much, so the only other variable, the period, must be increasing enough to counterbalance the increasing a. The period is dependent on the velocity, so if the period is increasing, then the velocity must be decreasing. Contrary to ...
... Your a is getting larger and larger, but the mass is not changing by much, so the only other variable, the period, must be increasing enough to counterbalance the increasing a. The period is dependent on the velocity, so if the period is increasing, then the velocity must be decreasing. Contrary to ...
The Danger of Deadly Cosmic Explosions
... • Brightest X-Ray burst – damaged satellites – affected radio. ...
... • Brightest X-Ray burst – damaged satellites – affected radio. ...
Document
... Not a black hole from a single stellar collapse, but must be built up over time. We shall meet these again when we come to look at quasars, but we have to ask “Just how active was the young Milky Way”? ...
... Not a black hole from a single stellar collapse, but must be built up over time. We shall meet these again when we come to look at quasars, but we have to ask “Just how active was the young Milky Way”? ...
PARTS OF THE UNIVERSE
... v Parallax: apparent shift in the position of an object when view from two different locations. v Parallax Example v Can be used to measure the distance of stars from Earth that are relatively close. v Proxima Centauri: closest star to earth v (4.3 light years away – 40 trillion km) ...
... v Parallax: apparent shift in the position of an object when view from two different locations. v Parallax Example v Can be used to measure the distance of stars from Earth that are relatively close. v Proxima Centauri: closest star to earth v (4.3 light years away – 40 trillion km) ...
Chapter 7 Review Answers
... The CBR found fits with the predictions consistent with the BBT, supporting the BBT. 13. It is unlikely that we will travel across even our own galaxy because it is 100,000 ly across, meaning that it would take 100,000 years travelling at the speed of light to get across the galaxy. 14.All galaxies ...
... The CBR found fits with the predictions consistent with the BBT, supporting the BBT. 13. It is unlikely that we will travel across even our own galaxy because it is 100,000 ly across, meaning that it would take 100,000 years travelling at the speed of light to get across the galaxy. 14.All galaxies ...
2014 Joseph E. Pesce, Ph.D. 1 Astro 113 Final Exam Review 1. What
... 27. Why does the region of the sky called the “Milky Way” have a larger concentration of stars than other regions? 28. What is an effect of a large fraction of dark matter in the Universe? ...
... 27. Why does the region of the sky called the “Milky Way” have a larger concentration of stars than other regions? 28. What is an effect of a large fraction of dark matter in the Universe? ...
Detecting the cold neutral gas in young radio galaxies
... neutral gas in the innermost regions of galaxies. Recent targeted studies of associated HI absorption in radio galaxies are starting to map out the location, and potential cosmological evolution, of cold gas in the host galaxies of Active Galactic Nuclei (AGNs). The observed 21cm absorption-line pro ...
... neutral gas in the innermost regions of galaxies. Recent targeted studies of associated HI absorption in radio galaxies are starting to map out the location, and potential cosmological evolution, of cold gas in the host galaxies of Active Galactic Nuclei (AGNs). The observed 21cm absorption-line pro ...