presentation (PPT format)
... Hubble proved that the spiral nebulae are far beyond the Milky Way (results presented in AAS on December 30, 1924) • Edwin Hubble used Cepheid variables to show that the “nebula” were actually immense star systems far beyond our Galaxy Cepheids were 104LS so For them to be so dim-they had To be dis ...
... Hubble proved that the spiral nebulae are far beyond the Milky Way (results presented in AAS on December 30, 1924) • Edwin Hubble used Cepheid variables to show that the “nebula” were actually immense star systems far beyond our Galaxy Cepheids were 104LS so For them to be so dim-they had To be dis ...
Galaxy Characteristics
... Sc, Sd, Sm galaxies – lots of H I S0 – Little gas – Some exceptions – ring-like structures ...
... Sc, Sd, Sm galaxies – lots of H I S0 – Little gas – Some exceptions – ring-like structures ...
Document
... USING KEY TERMS The statements below are false. For each statement, replace the underlined term to make a true statement. ...
... USING KEY TERMS The statements below are false. For each statement, replace the underlined term to make a true statement. ...
24.1 Hubble`s Galaxy Classification
... A summary of galaxy properties by type: Notice correlation between “stellar content,” “gas and dust,” and “star formation.” We want to make sense out of this in terms of whether one type formed earlier than another, or only just started forming stars, or stopped forming stars long ago, or is driven ...
... A summary of galaxy properties by type: Notice correlation between “stellar content,” “gas and dust,” and “star formation.” We want to make sense out of this in terms of whether one type formed earlier than another, or only just started forming stars, or stopped forming stars long ago, or is driven ...
Document
... for the Big Bang is the observed 3 K cosmic background radiation, which is believed to be the remnant of the primordial reball through which the universe made its appearance. In about a million years after the Big Bang, the temperature of this reball decreased from unbelievably high values of more ...
... for the Big Bang is the observed 3 K cosmic background radiation, which is believed to be the remnant of the primordial reball through which the universe made its appearance. In about a million years after the Big Bang, the temperature of this reball decreased from unbelievably high values of more ...
3rd EXAM VERSION A key - Department of Physics and Astronomy
... D. *a supermassive black hole at the center of an accretion disk, with jets of material being ejected perpendicular to the disk. 27. Why are there no nearby (and thus “young”) quasars? A. *Eventually, most of the accretion disk falls into the black hole and the “central engine” runs out of fuel. B. ...
... D. *a supermassive black hole at the center of an accretion disk, with jets of material being ejected perpendicular to the disk. 27. Why are there no nearby (and thus “young”) quasars? A. *Eventually, most of the accretion disk falls into the black hole and the “central engine” runs out of fuel. B. ...
Chapter 19. Mapping the Universe from Herschel to Sloan
... stars. Galaxies were giant collections of stars, gas and dust and to understand how matter was distributed through space, we had to focus on their distribution. Since faint galaxies could be seen right to the limit of the largest telescopes, it became clear that the Universe was much larger than we ...
... stars. Galaxies were giant collections of stars, gas and dust and to understand how matter was distributed through space, we had to focus on their distribution. Since faint galaxies could be seen right to the limit of the largest telescopes, it became clear that the Universe was much larger than we ...
ISP 205: Visions of the Universe
... • We see objects as they were in the past: • Light travels at a finite speed (300,000 km/s). • The farther away we look in distance, the further back we look in time. • Allows us to study the history of the Universe. ...
... • We see objects as they were in the past: • Light travels at a finite speed (300,000 km/s). • The farther away we look in distance, the further back we look in time. • Allows us to study the history of the Universe. ...
Measuring large distances
... both ends of the baseline. The angles to the object from each starting point are different. • A little trigonometry shows how far out each line of sight meets the other. ...
... both ends of the baseline. The angles to the object from each starting point are different. • A little trigonometry shows how far out each line of sight meets the other. ...
Review 1 Solutions
... 1. The night sky is mostly dark because we can only see stars within about 13.8 billion light years of us. T 2. The “rotation curves” that plot stars’ orbital speeds versus their distance from their galaxy’s center initially surprised astronomers by suggesting that large amounts of invisible matter ...
... 1. The night sky is mostly dark because we can only see stars within about 13.8 billion light years of us. T 2. The “rotation curves” that plot stars’ orbital speeds versus their distance from their galaxy’s center initially surprised astronomers by suggesting that large amounts of invisible matter ...
Document
... The Universe is filled with these star systems which themselves cluster together into larger systems. ...
... The Universe is filled with these star systems which themselves cluster together into larger systems. ...
Galaxies
... The Universe is filled with these star systems which themselves cluster together into larger systems. ...
... The Universe is filled with these star systems which themselves cluster together into larger systems. ...
It is now recognized that the vast majority of ellipticals are of
... • E galaxies in closely interacting systems sometimes exhibit outer isophotes which are visibly eggshaped and/or offset with respect to the centers of their galaxies. Again, tidal effects are strongly implicated. • On very deep exposures, some E galaxies are seen to have `plumes' or `tails', while o ...
... • E galaxies in closely interacting systems sometimes exhibit outer isophotes which are visibly eggshaped and/or offset with respect to the centers of their galaxies. Again, tidal effects are strongly implicated. • On very deep exposures, some E galaxies are seen to have `plumes' or `tails', while o ...
Galaxy
... revolving around a star In 2000, astronomers discovered a solar system about 10.5 light-years away with planets similar to our solar system ...
... revolving around a star In 2000, astronomers discovered a solar system about 10.5 light-years away with planets similar to our solar system ...
Astronomy practice questions for 3-6 test
... 18. Using the same diagram as for #17, assume that the brightness goes from 100% to 98% in the case of the G dwarf and from 100% to 85% in the case of the M dwarf. What is the radi ...
... 18. Using the same diagram as for #17, assume that the brightness goes from 100% to 98% in the case of the G dwarf and from 100% to 85% in the case of the M dwarf. What is the radi ...
Galaxy5
... It has to be accreting material. • This requires that gas or stars be sent into the immediate vicinity of the central massive black hole. • The way to accomplish this it to merge galaxies. This introduces new material to the central nucleus. • In the distant past, during galaxy formation, there were ...
... It has to be accreting material. • This requires that gas or stars be sent into the immediate vicinity of the central massive black hole. • The way to accomplish this it to merge galaxies. This introduces new material to the central nucleus. • In the distant past, during galaxy formation, there were ...
Slide 1
... •Ellipticals have lots of globular clusters (about twice that of disk galaxies) •these fall into two groups based on color •color determined by metallicity, with more metal-rich GCs (redder) possibly the result of galaxy mergers •Ellipticals have much less cool, atomic gas than spiral galaxies •< 1 ...
... •Ellipticals have lots of globular clusters (about twice that of disk galaxies) •these fall into two groups based on color •color determined by metallicity, with more metal-rich GCs (redder) possibly the result of galaxy mergers •Ellipticals have much less cool, atomic gas than spiral galaxies •< 1 ...
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 ...
The Universe - staff.harrisonburg.k12.va
... football. • “Clean” galaxies: Very little dust and gas. ...
... football. • “Clean” galaxies: Very little dust and gas. ...
Aug 2015 supplement - Hermanus Astronomy
... been seen as faint blobs. However, now new observations using the power of ALMA are starting to change this. Astronomers trained ALMA on galaxies that were known to be seen only about 800 million years after the Big Bang. They were not looking for the light from stars, but instead for the faint glow ...
... been seen as faint blobs. However, now new observations using the power of ALMA are starting to change this. Astronomers trained ALMA on galaxies that were known to be seen only about 800 million years after the Big Bang. They were not looking for the light from stars, but instead for the faint glow ...
File
... (arms), usually a central bulge + dust are present as well. SB = barred-spiral galaxies -- are similar to spirals, but with the presence of a bar in the central regions. E = elliptical galaxies -- galaxies with smooth light distributions, biaxial profiles. Round to oval in shape. Irr = irregular gal ...
... (arms), usually a central bulge + dust are present as well. SB = barred-spiral galaxies -- are similar to spirals, but with the presence of a bar in the central regions. E = elliptical galaxies -- galaxies with smooth light distributions, biaxial profiles. Round to oval in shape. Irr = irregular gal ...
Our Sun - STEMpire Central
... The pulse rate of a variable star is related to what intrinsic property of that star, as discovered by Henrietta Swan Leavitt? ...
... The pulse rate of a variable star is related to what intrinsic property of that star, as discovered by Henrietta Swan Leavitt? ...
Astron 104 Laboratory #11 The Scale of the Milky Way
... galaxies. From question 9, we saw that the Andromeda Galaxy was about 2,500,000 ltyr from us. On the picture, this spot would be 250 cm (about two and a half meter sticks) away from the dot representing the Sun. The nearest group of galaxies to us (not counting our own Local Group) is the Virgo Clus ...
... galaxies. From question 9, we saw that the Andromeda Galaxy was about 2,500,000 ltyr from us. On the picture, this spot would be 250 cm (about two and a half meter sticks) away from the dot representing the Sun. The nearest group of galaxies to us (not counting our own Local Group) is the Virgo Clus ...
Galaxy Zoo
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.