Galaxies – Island universes
... S0’s: Bulge + disk, but the disk is faint and has no spiral arms or star formation going on. Spirals: Bulge + disk. Disk has spiral arms and is where the new star formation is happening. Barred Spirals: Same, but additionally have a straight “bar” of stars centered on the center of the galaxy. Milky ...
... S0’s: Bulge + disk, but the disk is faint and has no spiral arms or star formation going on. Spirals: Bulge + disk. Disk has spiral arms and is where the new star formation is happening. Barred Spirals: Same, but additionally have a straight “bar” of stars centered on the center of the galaxy. Milky ...
ASTR 340 - TerpConnect
... What this course will cover started billions of years ago. Man looked at the sky probably as early as he came into existence. Everybody has, at one time or another gazed at the stars and pondered at least a bit on the mysteries of the universe and man’s place in it. This course will attempt to cover ...
... What this course will cover started billions of years ago. Man looked at the sky probably as early as he came into existence. Everybody has, at one time or another gazed at the stars and pondered at least a bit on the mysteries of the universe and man’s place in it. This course will attempt to cover ...
Dark Matter - UW - Laramie, Wyoming | University of Wyoming
... Hot Gas in Clusters of Galaxies Space between galaxies is not empty, but filled with hot gas (observable in X rays) ...
... Hot Gas in Clusters of Galaxies Space between galaxies is not empty, but filled with hot gas (observable in X rays) ...
Review Sheet and Study Hints - Tufts Institute of Cosmology
... Why do we need it? Visualization aids of the expanding universe. Is the universe finite or infinite (in what sense is it finite or infinite)? Does it have and edge, or a center? What does it expand into (why is this a wrong question)? ...
... Why do we need it? Visualization aids of the expanding universe. Is the universe finite or infinite (in what sense is it finite or infinite)? Does it have and edge, or a center? What does it expand into (why is this a wrong question)? ...
Document
... If the universe extends infinitely, then eventually if we look out into the night sky, we should be able to see a star in any direction, even if the star is really far away. Since the universe was infinitely old, the light from stars at extremely far distances would have already reached us, even if ...
... If the universe extends infinitely, then eventually if we look out into the night sky, we should be able to see a star in any direction, even if the star is really far away. Since the universe was infinitely old, the light from stars at extremely far distances would have already reached us, even if ...
Grand Tour Worksheet - School District of La Crosse
... 4. What order of magnitude is a light year to an A.U.? 5. What is the average distance between stars in our galaxy? ...
... 4. What order of magnitude is a light year to an A.U.? 5. What is the average distance between stars in our galaxy? ...
Outline - Picnic Point High School
... 4.2.3identify the nature of emissions reaching the Earth from the Sun 4.2.4 describe the particulate nature of the solar wind 4.2.5 outline the cyclic nature of sunspot activity and its impact on Earth through solar winds 4.2.6 describe sunspots as representing regions of strong magnetic activity an ...
... 4.2.3identify the nature of emissions reaching the Earth from the Sun 4.2.4 describe the particulate nature of the solar wind 4.2.5 outline the cyclic nature of sunspot activity and its impact on Earth through solar winds 4.2.6 describe sunspots as representing regions of strong magnetic activity an ...
Multiple Choice, continued
... • The galaxy in which we live, the Milky Way, is a spiral galaxy in which the sun is one of hundreds of billions of stars. • Two irregular galaxies, the Large Magellanic Cloud and Small Magellanic Cloud, are our closest neighbors. • These three galaxies are called the Local Group. ...
... • The galaxy in which we live, the Milky Way, is a spiral galaxy in which the sun is one of hundreds of billions of stars. • Two irregular galaxies, the Large Magellanic Cloud and Small Magellanic Cloud, are our closest neighbors. • These three galaxies are called the Local Group. ...
Interactive Vocabulary Review for Outer Space Indicator
... A large collection of stars, gas and dust held together by mutual gravitation is what scientists call a GALAXY! Keep moving! ...
... A large collection of stars, gas and dust held together by mutual gravitation is what scientists call a GALAXY! Keep moving! ...
Does size matter (in the SFRs)?
... the same locations of the graph, and have very similar values of the SFRs. On the contrary of course, UGC 5296 is not the only quiescent galaxy in the Universe, but the caveat is that 2/3 of the 18 galaxies we have observed common among the are quiescent. As they were selected because of their small ...
... the same locations of the graph, and have very similar values of the SFRs. On the contrary of course, UGC 5296 is not the only quiescent galaxy in the Universe, but the caveat is that 2/3 of the 18 galaxies we have observed common among the are quiescent. As they were selected because of their small ...
CHAPTER 29 STARS 240 points
... SECTION 29.1 The Sun (40 points this page) In your textbook, read about the properties of the Sun and the Sun’s atmosphere. Use each of the terms below just once to complete the passage. ...
... SECTION 29.1 The Sun (40 points this page) In your textbook, read about the properties of the Sun and the Sun’s atmosphere. Use each of the terms below just once to complete the passage. ...
2. A giant hand took one of the planets discovered
... 2. A giant hand took one of the planets discovered around other stars and put it in the solar system at the same distance from the sun as from its star. The mass of the planet is approximately that of Jupiter and the orbit is approximately that of Earth. These are the “hot Jupiters”, as big as Jupit ...
... 2. A giant hand took one of the planets discovered around other stars and put it in the solar system at the same distance from the sun as from its star. The mass of the planet is approximately that of Jupiter and the orbit is approximately that of Earth. These are the “hot Jupiters”, as big as Jupit ...
Tick Bait`s Universe Scavenger Hunt – “Going UP”
... 5. The inner planets are all made up of rock, while the outer planets are mostly just ________________________________________ . 6. True or False: The edge of our solar system stops at the orbits of Neptune and Pluto. True ...
... 5. The inner planets are all made up of rock, while the outer planets are mostly just ________________________________________ . 6. True or False: The edge of our solar system stops at the orbits of Neptune and Pluto. True ...
Lecture Eleven (Powerpoint format)
... the reasoning processes of eminent scientists engaged in a great controversy for which the evidence on both sides is fragmentary and partly faulty. This debate illustrates forcefully how tricky it is to pick one's way through the treacherous ground that characterizes research at the frontiers of sci ...
... the reasoning processes of eminent scientists engaged in a great controversy for which the evidence on both sides is fragmentary and partly faulty. This debate illustrates forcefully how tricky it is to pick one's way through the treacherous ground that characterizes research at the frontiers of sci ...
Eye on the Sky - Sci-Port
... Key Terms: Universe: the totality of known or supposed objects and phenomena throughout space; the cosmos; macrocosm. Galaxy: a large system of stars held together by mutual gravitation and isolated from similar systems by vast regions of space. Black Hole: a massive object with zero volume and infi ...
... Key Terms: Universe: the totality of known or supposed objects and phenomena throughout space; the cosmos; macrocosm. Galaxy: a large system of stars held together by mutual gravitation and isolated from similar systems by vast regions of space. Black Hole: a massive object with zero volume and infi ...
Untitled
... Same Scale as Horsehead Nebula “Stellar Eggs” Stars form in these “eggs” that are dark dense clouds (we see because they are illuminated by nearby stars ...
... Same Scale as Horsehead Nebula “Stellar Eggs” Stars form in these “eggs” that are dark dense clouds (we see because they are illuminated by nearby stars ...
May 2015 - Hermanus Astronomy
... Galaxies like our Milky Way with its 100 billion stars are usually not found in isolation. In the universe today, 13.8 billion years after the Big Bang, many are in dense clusters of tens, hundreds, or even thousands of galaxies. However, these clusters have not always existed, and a key question in ...
... Galaxies like our Milky Way with its 100 billion stars are usually not found in isolation. In the universe today, 13.8 billion years after the Big Bang, many are in dense clusters of tens, hundreds, or even thousands of galaxies. However, these clusters have not always existed, and a key question in ...
Stars, Galaxies, and the Universe Section 3 Stars, Galaxies, and the
... and are held together by gravity. The center of mass, or barycenter, is somewhere between the two stars. • In star systems that have more than two stars, two stars may revolve rapidly around a common barycenter, while a third star revolves more slowly at a greater distance from the pair. • Astronome ...
... and are held together by gravity. The center of mass, or barycenter, is somewhere between the two stars. • In star systems that have more than two stars, two stars may revolve rapidly around a common barycenter, while a third star revolves more slowly at a greater distance from the pair. • Astronome ...
File - 5th Grade Science Almost done!!!!!!!!!
... • This slide is for your information only, please start the ppt on the next slide for the kids • The first thing the students do when they enter the room is write down the homework (see next slide) in stone-silence. • After about 20 to 30 seconds of silence I tell the students “Please begin the warm ...
... • This slide is for your information only, please start the ppt on the next slide for the kids • The first thing the students do when they enter the room is write down the homework (see next slide) in stone-silence. • After about 20 to 30 seconds of silence I tell the students “Please begin the warm ...
dyk_ans
... As you see, this is an area still awaiting good explanation and continued research. 4. If there is no gravity in space, why do “shooting stars” fall? Ans: Gravity can be thought of as a side effect of matter, because any object that has mass generates a gravitational field. If two or more objects ar ...
... As you see, this is an area still awaiting good explanation and continued research. 4. If there is no gravity in space, why do “shooting stars” fall? Ans: Gravity can be thought of as a side effect of matter, because any object that has mass generates a gravitational field. If two or more objects ar ...
The Metric System
... planets in the Solar System. One AU is defined as the average distance from Sun to Earth … 149,600,000 km ...
... planets in the Solar System. One AU is defined as the average distance from Sun to Earth … 149,600,000 km ...
Document
... If the universe extends infinitely, then eventually if we look out into the night sky, we should be able to see a star in any direction, even if the star is really far away. Since the universe was infinitely old, the light from stars at extremely far distances would have already reached us, even if ...
... If the universe extends infinitely, then eventually if we look out into the night sky, we should be able to see a star in any direction, even if the star is really far away. Since the universe was infinitely old, the light from stars at extremely far distances would have already reached us, even if ...
Our Universe
... •These black holes are a million to a billion times more massive than our sun! •Is there a black hole in the center of our Milky Way- YES! •The fundamental descriptions of black holes are based on equations in the theory of general relativity developed by the German-born physicist Albert Einstein. T ...
... •These black holes are a million to a billion times more massive than our sun! •Is there a black hole in the center of our Milky Way- YES! •The fundamental descriptions of black holes are based on equations in the theory of general relativity developed by the German-born physicist Albert Einstein. T ...
File
... Light from stars can be analysed to find out if the star is moving towards us, away from us or is stationary relative to the Earth. Our Sun is stationary relative to the Earth. The spectral lines from our Sun and three other stars are shown below. ...
... Light from stars can be analysed to find out if the star is moving towards us, away from us or is stationary relative to the Earth. Our Sun is stationary relative to the Earth. The spectral lines from our Sun and three other stars are shown below. ...
Observable universe
The observable universe consists of the galaxies and other matter that can, in principle, be observed from Earth at the present time because light and other signals from these objects has had time to reach the Earth since the beginning of the cosmological expansion. Assuming the universe is isotropic, the distance to the edge of the observable universe is roughly the same in every direction. That is, the observable universe is a spherical volume (a ball) centered on the observer. Every location in the Universe has its own observable universe, which may or may not overlap with the one centered on Earth.The word observable used in this sense does not depend on whether modern technology actually permits detection of radiation from an object in this region (or indeed on whether there is any radiation to detect). It simply indicates that it is possible in principle for light or other signals from the object to reach an observer on Earth. In practice, we can see light only from as far back as the time of photon decoupling in the recombination epoch. That is when particles were first able to emit photons that were not quickly re-absorbed by other particles. Before then, the Universe was filled with a plasma that was opaque to photons.The surface of last scattering is the collection of points in space at the exact distance that photons from the time of photon decoupling just reach us today. These are the photons we detect today as cosmic microwave background radiation (CMBR). However, with future technology, it may be possible to observe the still older relic neutrino background, or even more distant events via gravitational waves (which also should move at the speed of light). Sometimes astrophysicists distinguish between the visible universe, which includes only signals emitted since recombination—and the observable universe, which includes signals since the beginning of the cosmological expansion (the Big Bang in traditional cosmology, the end of the inflationary epoch in modern cosmology). According to calculations, the comoving distance (current proper distance) to particles from the CMBR, which represent the radius of the visible universe, is about 14.0 billion parsecs (about 45.7 billion light years), while the comoving distance to the edge of the observable universe is about 14.3 billion parsecs (about 46.6 billion light years), about 2% larger.The best estimate of the age of the universe as of 2015 is 7010137990000000000♠13.799±0.021 billion years but due to the expansion of space humans are observing objects that were originally much closer but are now considerably farther away (as defined in terms of cosmological proper distance, which is equal to the comoving distance at the present time) than a static 13.8 billion light-years distance. It is estimated that the diameter of the observable universe is about 28 gigaparsecs (91 billion light-years, 8.8×1026 metres or 5.5×1023 miles), putting the edge of the observable universe at about 46–47 billion light-years away.