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April 2015 - Southern Astronomical Society
... It seemed coincidental that I was reading this book recently when a new item was published about a software upgade for Opportunity’s flash memory. Spirit and Opportunity landed on Mars in January 2004. Though Spirit died in 2010, Opportunity is still going - that’s’ amazing! Check out the link for m ...
... It seemed coincidental that I was reading this book recently when a new item was published about a software upgade for Opportunity’s flash memory. Spirit and Opportunity landed on Mars in January 2004. Though Spirit died in 2010, Opportunity is still going - that’s’ amazing! Check out the link for m ...
Galaxies
... Astronomers therefore prefer to quote redshifts rather than distances The look-back time is the time when light was emitted from a distant object For very distant objects it is less than the redshift would indicate, as the object has receded in the meantime Astronomy 1-2 ...
... Astronomers therefore prefer to quote redshifts rather than distances The look-back time is the time when light was emitted from a distant object For very distant objects it is less than the redshift would indicate, as the object has receded in the meantime Astronomy 1-2 ...
Galaxy formation in the Planck cosmology - II. Star
... Voort (2015). The difference between the two reflects the merger history of galaxies. The term SFH is often loosely used in papers without being defined. Observationally, the only direct measure of SFHs corresponds to that described in this paper, i.e. the distribution of formation times of all the ...
... Voort (2015). The difference between the two reflects the merger history of galaxies. The term SFH is often loosely used in papers without being defined. Observationally, the only direct measure of SFHs corresponds to that described in this paper, i.e. the distribution of formation times of all the ...
Starburst Galaxies - Beck-Shop
... them. It is likely that they also produce many of the lower mass stars, but these are too faint to detect and so that cannot be confirmed observationally. During the early stages of the universe the contribution of starbursts to the overall production of stars may have been even higher. The extreme ...
... them. It is likely that they also produce many of the lower mass stars, but these are too faint to detect and so that cannot be confirmed observationally. During the early stages of the universe the contribution of starbursts to the overall production of stars may have been even higher. The extreme ...
Structure of the Universe
... For other galaxies we can see things as they were billions of years ago, when the universe was young ...
... For other galaxies we can see things as they were billions of years ago, when the universe was young ...
Module 11.1.1: Galaxies: Morphology and the Hubble Sequence
... doesn't have a lot of active star formation. And just like other spiral galaxies, these S0's, or lenticulars, because their shape resembles a lens, could also contain bars. [slide 10] Among the ...
... doesn't have a lot of active star formation. And just like other spiral galaxies, these S0's, or lenticulars, because their shape resembles a lens, could also contain bars. [slide 10] Among the ...
exploring the solar system, the galaxies, and the
... at the top of the page. Click on the box labeled Cosmic Collision – multimedia show. Play Cosmic Collision. 3. What is the largest galaxy in our region of space? The Andomeda Galaxy ___________ ____________________. 4. How fast is it approaching the Milky Way? _300,000 miles per hour ____________. 5 ...
... at the top of the page. Click on the box labeled Cosmic Collision – multimedia show. Play Cosmic Collision. 3. What is the largest galaxy in our region of space? The Andomeda Galaxy ___________ ____________________. 4. How fast is it approaching the Milky Way? _300,000 miles per hour ____________. 5 ...
Our galaxy, the Milky Way, has about 3 billion solar masses of HI
... to these clouds of hydrogen and their velocity. With the hydrogen cloud’s velocity and distance an astronomer can assemble a galactic rotation curve from which the orbital velocity and orbital radius of hydrogen clouds around the center of the galaxy can be deduced. With these two pieces of informat ...
... to these clouds of hydrogen and their velocity. With the hydrogen cloud’s velocity and distance an astronomer can assemble a galactic rotation curve from which the orbital velocity and orbital radius of hydrogen clouds around the center of the galaxy can be deduced. With these two pieces of informat ...
Chapter 15 Normal and Active Galaxies
... 1. A solar eclipse can only happen during a new moon. 2. Polaris will not always be the pole star due to precession shifting the celestial pole. 3. A tropical day is not the same length as a sidereal year. 4. The larger the parallax shift, the closer you are to an ...
... 1. A solar eclipse can only happen during a new moon. 2. Polaris will not always be the pole star due to precession shifting the celestial pole. 3. A tropical day is not the same length as a sidereal year. 4. The larger the parallax shift, the closer you are to an ...
Astronomy 401 Lecture 1 Overview of the Universe 1 Class overview
... only a fraction F ∼ rmax /λ of the sky will be covered with stars. Note that this result will also be found if the universe is infinitely large, but has no stars beyond a distance rmax . • Assumed that the universe is infinitely old. When we see stars farther away, we’re also seeing stars farther ba ...
... only a fraction F ∼ rmax /λ of the sky will be covered with stars. Note that this result will also be found if the universe is infinitely large, but has no stars beyond a distance rmax . • Assumed that the universe is infinitely old. When we see stars farther away, we’re also seeing stars farther ba ...
Why Study Cosmic Near Infrared Background? (1-4um)
... Did these early stars that are responsible for the near infrared background overenrich the metals in the universe too early? ...
... Did these early stars that are responsible for the near infrared background overenrich the metals in the universe too early? ...
Activity : Milky Way
... In any spiral galaxy, two features stand out: • the spiral arms, and • the brighter, bulging centre. What lies in the innermost region is obscured by gas, dust and the increased star density - and this is especially so for our own Galaxy from our viewpoint out in the disk. The observing tools for ov ...
... In any spiral galaxy, two features stand out: • the spiral arms, and • the brighter, bulging centre. What lies in the innermost region is obscured by gas, dust and the increased star density - and this is especially so for our own Galaxy from our viewpoint out in the disk. The observing tools for ov ...
8-4.9 - S2TEM Centers SC
... aware that not all galaxies look the same. 4. Provide students with copies of the activity sheet and the trading cards. Tell them the cards have images of galaxies on one side and information about the galaxies and the constellations in which they reside on the other side. Explain that some of these ...
... aware that not all galaxies look the same. 4. Provide students with copies of the activity sheet and the trading cards. Tell them the cards have images of galaxies on one side and information about the galaxies and the constellations in which they reside on the other side. Explain that some of these ...
VISIT TO NORMAN LOCKYER OBSERVATORY IN SIDMOUTH
... largest stars known, with a diameter of around 500 times that of our Sun. In common with most giant stars it varies its size, changing in brightness as it does so from 3rd to 4th magnitude. Lying along one side of the "keystone" lies one of the wonders of the skies, the great globular cluster, M13. ...
... largest stars known, with a diameter of around 500 times that of our Sun. In common with most giant stars it varies its size, changing in brightness as it does so from 3rd to 4th magnitude. Lying along one side of the "keystone" lies one of the wonders of the skies, the great globular cluster, M13. ...
Highlights of the Month - Bridgend Astronomical Society
... through a small telescope even though its elevation never gets above ~20 degrees. It dims slightly from magnitude +0.3 to +0.5 during August as its angular size falls slightly from 17.5 to 16.7 arc seconds. Saturn transits (due south) at sunset and so can be seen low in the south-western sky during ...
... through a small telescope even though its elevation never gets above ~20 degrees. It dims slightly from magnitude +0.3 to +0.5 during August as its angular size falls slightly from 17.5 to 16.7 arc seconds. Saturn transits (due south) at sunset and so can be seen low in the south-western sky during ...
Star formation and internal kinematics of irregular galaxies
... and subsequent explosive death of the more massive stars proceeds on timescales much shorter than the dynamical timescales within a galaxy. And a star with the same initial mass and metallicity will trace the same evolutionary track in the HR diagram, irrespective of the galaxy into which it was bor ...
... and subsequent explosive death of the more massive stars proceeds on timescales much shorter than the dynamical timescales within a galaxy. And a star with the same initial mass and metallicity will trace the same evolutionary track in the HR diagram, irrespective of the galaxy into which it was bor ...
TAP 704- 8: The ladder of astronomical distances
... Since then, Cepheid variables have been an essential link in the astronomical distance scale. With parallax measurements to nearby Cepheids from the Hipparcos satellite, and with the Hubble telescope just recently able to detect Cepheid variables as far away as the Virgo cluster (tens of millions of ...
... Since then, Cepheid variables have been an essential link in the astronomical distance scale. With parallax measurements to nearby Cepheids from the Hipparcos satellite, and with the Hubble telescope just recently able to detect Cepheid variables as far away as the Virgo cluster (tens of millions of ...
Candles in the Dark
... that the Milky Way was the whole Universe, so M31 was presumably a relatively small and nearby object. Hubble calculated from the variation of his Andromeda Cepheid how far away it was and came up with the answer of more than 900 000 light years (better modern measurements give the accepted figure o ...
... that the Milky Way was the whole Universe, so M31 was presumably a relatively small and nearby object. Hubble calculated from the variation of his Andromeda Cepheid how far away it was and came up with the answer of more than 900 000 light years (better modern measurements give the accepted figure o ...
19 The Milky Way Galaxy
... Structure of the Milky Way 1. Select bright objects that you can see throughout the Milky Way and trace their directions and distances. 2. Observe objects at radio and infrared wavelengths to circumvent the problem of optical obscuration, and catalog their directions and distances. 3. Trace the orbi ...
... Structure of the Milky Way 1. Select bright objects that you can see throughout the Milky Way and trace their directions and distances. 2. Observe objects at radio and infrared wavelengths to circumvent the problem of optical obscuration, and catalog their directions and distances. 3. Trace the orbi ...
The Universe - HMXEarthScience
... Which conclusion can be made by comparing the standard spectrum to the spectrum produced from this distant star? A) The star’s spectral lines have shifted toward the ultraviolet end of the spectrum and the star is moving toward Earth. B) The star’s spectral lines have shifted toward the ultraviolet ...
... Which conclusion can be made by comparing the standard spectrum to the spectrum produced from this distant star? A) The star’s spectral lines have shifted toward the ultraviolet end of the spectrum and the star is moving toward Earth. B) The star’s spectral lines have shifted toward the ultraviolet ...
Stars and Their Characteristics
... Black hole: The final life stage of an extremely massive star, with a gravitational field so intense that not even light can escape. Black holes are areas in space where there is a huge amount of mass in a very small space. The gravity of this mass is so great that everything in the area is pulled ...
... Black hole: The final life stage of an extremely massive star, with a gravitational field so intense that not even light can escape. Black holes are areas in space where there is a huge amount of mass in a very small space. The gravity of this mass is so great that everything in the area is pulled ...
Section 4 Formation of the Universe Chapter 19
... Look at the photograph of a spiral galaxy. • Describe the evidence that indicates that the galaxy is rotating. • What other objects have you seen look similar to a spiral galaxy? Do they rotate? Record your answers in your science journal. ...
... Look at the photograph of a spiral galaxy. • Describe the evidence that indicates that the galaxy is rotating. • What other objects have you seen look similar to a spiral galaxy? Do they rotate? Record your answers in your science journal. ...
Observational Constraints on Hot Gas Accretion
... the fraction of stars unrelated to baryon fraction. Star-poor galaxies don’t have enough SN energy to drive a wind SN unlikely to drive out the baryons (some galaxies very star-poor). Stark et al. (2009), McGaugh (2005) data ...
... the fraction of stars unrelated to baryon fraction. Star-poor galaxies don’t have enough SN energy to drive a wind SN unlikely to drive out the baryons (some galaxies very star-poor). Stark et al. (2009), McGaugh (2005) data ...
Measuring the distance to Galaxies
... The distance to nearby Cepheid variables can be determined by parallax (a method you will learn in this course) The inverse square law and the periodluminosity relationship of Henrietta Leavitt enables the distance of all observable Cepheid variables to be determined ...
... The distance to nearby Cepheid variables can be determined by parallax (a method you will learn in this course) The inverse square law and the periodluminosity relationship of Henrietta Leavitt enables the distance of all observable Cepheid variables to be determined ...
Galaxy Zoo
![](https://commons.wikimedia.org/wiki/Special:FilePath/Galaxyzoo.jpg?width=300)
Galaxy Zoo is a crowdsourced astronomy project which invites people to assist in the morphological classification of large numbers of galaxies. (e.g.) It is an example of citizen science as it enlists the help of members of the public to help in scientific research. There have been seven versions up to July 2014, which are outlined in this article. Galaxy Zoo is part of the Zooniverse, a group of citizen science projects.