Astronomy
... Elliptical Galaxy 1. Elliptical galaxies have smooth, featureless lightprofiles. 2. There is very little interstellar matter (neither gas nor dust), which results in low rates of star formation. 3. Elliptical galaxies are dominated by old stellar populations, or old stars. ...
... Elliptical Galaxy 1. Elliptical galaxies have smooth, featureless lightprofiles. 2. There is very little interstellar matter (neither gas nor dust), which results in low rates of star formation. 3. Elliptical galaxies are dominated by old stellar populations, or old stars. ...
BYOG: Build Your Own Galaxy
... A typical spiral galaxy is shaped like a flat disk, about 100,000 light-years in diameter and just 1000 light-years thick — about the same proportions as a standard CD. And, it has a central bulge and spiral arms. The bulge contains old stars; but the arms winding through the disk contain dust, gas, ...
... A typical spiral galaxy is shaped like a flat disk, about 100,000 light-years in diameter and just 1000 light-years thick — about the same proportions as a standard CD. And, it has a central bulge and spiral arms. The bulge contains old stars; but the arms winding through the disk contain dust, gas, ...
Class web page
... Typical Galaxy: roughly 1011 stars Observable Universe: roughly 1011 galaxies How much is 1011? ...
... Typical Galaxy: roughly 1011 stars Observable Universe: roughly 1011 galaxies How much is 1011? ...
2. Universe and galaxies
... • II. Most common type • III. Contains only old stars and very little dust and gas. ...
... • II. Most common type • III. Contains only old stars and very little dust and gas. ...
The Galactic Centre: a hidden treasure
... A region of intense star formation surrounding a point source of radio and X-ray emission ...
... A region of intense star formation surrounding a point source of radio and X-ray emission ...
Announcements Our Milky Way Galaxy March 30 −
... Gas that formed disk stars was orbiting MW in a circle 1. Gas that formed halo stars was streaming toward MW. 2. Halo stars were in a little galaxy that got caught by MW. ...
... Gas that formed disk stars was orbiting MW in a circle 1. Gas that formed halo stars was streaming toward MW. 2. Halo stars were in a little galaxy that got caught by MW. ...
A - 4 - Subaru Telescope
... Not all galaxies look pretty and symmetric. When they do not, astronomers use the term “irregular" to describe them. IC 10 is one such galaxy. Astronomers study it in order to understand how stars evolve. IC 10 is also a member of a cluster of galaxies called the Local Group, which includes the Milk ...
... Not all galaxies look pretty and symmetric. When they do not, astronomers use the term “irregular" to describe them. IC 10 is one such galaxy. Astronomers study it in order to understand how stars evolve. IC 10 is also a member of a cluster of galaxies called the Local Group, which includes the Milk ...
The Universe - greenslime.info
... 100,000 light-years in diameter. contains about 200 billion stars Home to Our Sun the Sun and Earth are located 2/3 away from center in one of the outer spiral arms ● Sun orbits central Milky Way at about 235 km/s around the center of the galaxy You are here! ...
... 100,000 light-years in diameter. contains about 200 billion stars Home to Our Sun the Sun and Earth are located 2/3 away from center in one of the outer spiral arms ● Sun orbits central Milky Way at about 235 km/s around the center of the galaxy You are here! ...
The Milky Way Galaxy
... The gas layer • At Sun surface density ~1020 atoms / cm2 • Gas layer ~300 light years (3 1020cm) thick, so n~0.3 atoms / cm3 • Density of air ~1020 atoms / cm3 • So squashed to density air layer ~1 cm thick • Can see ~1kpc; when squashed could see only ~ 10cm through it • Yuk! ...
... The gas layer • At Sun surface density ~1020 atoms / cm2 • Gas layer ~300 light years (3 1020cm) thick, so n~0.3 atoms / cm3 • Density of air ~1020 atoms / cm3 • So squashed to density air layer ~1 cm thick • Can see ~1kpc; when squashed could see only ~ 10cm through it • Yuk! ...
Distance Scales in the Universe Name
... 8. Most of the light from stars in the Milky Way comes from stars in the disk (in the plane of the “Milky Way”). Most of the stars in the disk are within 15 kpc of the center of the Galaxy, and within 1 kpc of the plane of the Milky Way. Draw a cartoon picture of the galaxy edge-on and face-on, and ...
... 8. Most of the light from stars in the Milky Way comes from stars in the disk (in the plane of the “Milky Way”). Most of the stars in the disk are within 15 kpc of the center of the Galaxy, and within 1 kpc of the plane of the Milky Way. Draw a cartoon picture of the galaxy edge-on and face-on, and ...
Great Migrations & other natural history tales
... telescopes, spiral galaxies looked a lot like blurry, perhaps gaseous objects. Hence the idea that they’re much smaller parts of the Milky Way. ...
... telescopes, spiral galaxies looked a lot like blurry, perhaps gaseous objects. Hence the idea that they’re much smaller parts of the Milky Way. ...
Galaxies Presentation
... amount of gas, and dust. – Most are yellow and red because they do not contain young stars. – Vary in size from small to extremely large ...
... amount of gas, and dust. – Most are yellow and red because they do not contain young stars. – Vary in size from small to extremely large ...
Astronomy 100—Quiz 4
... 2. Most of the mass of the Milky Way galaxy is A. contained in the massive O and B stars in the galaxy. B. contained in the H I regions of the galaxy. C. contained in the H II regions of the galaxy. D. contained in the dark matter halo of the galaxy. E. contained in the disk of the galaxy. 3. Which ...
... 2. Most of the mass of the Milky Way galaxy is A. contained in the massive O and B stars in the galaxy. B. contained in the H I regions of the galaxy. C. contained in the H II regions of the galaxy. D. contained in the dark matter halo of the galaxy. E. contained in the disk of the galaxy. 3. Which ...
Welcome to the Milky Way Galaxy: Student Notes
... • This is an __________ conception of what the Milky Way Galaxy looks like. The artist based the picture on different photos taken by astronomers. • Why don’t we have any real pictures of the Milky Way Galaxy? • Where are we located in this picture? • We cannot photograph the Milky Way because it is ...
... • This is an __________ conception of what the Milky Way Galaxy looks like. The artist based the picture on different photos taken by astronomers. • Why don’t we have any real pictures of the Milky Way Galaxy? • Where are we located in this picture? • We cannot photograph the Milky Way because it is ...
15-1/15-2 Reading Questions
... roughly _____ billion years ago, left that cluster, and has circled the galaxy about _________ times. 21. Even if there were no star formation at all, rotating disk galaxies could form _____________ ____________. But without star formation to make young, hot, luminous stars, the spiral arms would be ...
... roughly _____ billion years ago, left that cluster, and has circled the galaxy about _________ times. 21. Even if there were no star formation at all, rotating disk galaxies could form _____________ ____________. But without star formation to make young, hot, luminous stars, the spiral arms would be ...
Galaxies The Milky Way
... There are galaxies of various shapes and patterns, but they can be grouped into four main types – spiral, barred spiral, elliptical, and irregular. Like moons and planets, galaxies spin and move around in space. They are travelling away from each other at up to 112 651 km per second. The largest gal ...
... There are galaxies of various shapes and patterns, but they can be grouped into four main types – spiral, barred spiral, elliptical, and irregular. Like moons and planets, galaxies spin and move around in space. They are travelling away from each other at up to 112 651 km per second. The largest gal ...
Our Galactic Archipelago
... Lalande (another French astronomer) said of him that, during Lacaille’s short life, he had made more observations and calculations than all the astronomers of his time put together. ...
... Lalande (another French astronomer) said of him that, during Lacaille’s short life, he had made more observations and calculations than all the astronomers of his time put together. ...
Spiral Galaxy Galaxies flash cards Refer to: Pg. 179-217
... Galaxies flash cards Refer to: Pg. 179-217 ...
... Galaxies flash cards Refer to: Pg. 179-217 ...
CH 15 SEC 4 STAR SYSTEMS AND GALAXIES
... KEY- EACH GALAXY CONTAINS BILLIONS OF STARS AND THE LARGER ONES TRILLIONS OF STARS. KEY- SCIENTIST ARE DISCOVERING MORE EARTHLIKE PLANETS ALL THE TIME. ...
... KEY- EACH GALAXY CONTAINS BILLIONS OF STARS AND THE LARGER ONES TRILLIONS OF STARS. KEY- SCIENTIST ARE DISCOVERING MORE EARTHLIKE PLANETS ALL THE TIME. ...
Black Holes - World of Teaching
... Black Holes The intense gravitational field left when a giant star collapses ...
... Black Holes The intense gravitational field left when a giant star collapses ...
MILKY WAY GALAXY
... • The Milky way Galaxy is filled with different types of particles and energy sources such as protons, electrons, electromagnetic radiation, magnetic fields, and so fourth. ...
... • The Milky way Galaxy is filled with different types of particles and energy sources such as protons, electrons, electromagnetic radiation, magnetic fields, and so fourth. ...
Galaxies - Physics
... What are the spiral and elliptical nebulae? • No individual stars are visible, even in largest telescopes • Some have spiral structure, as if spinning rapidly • Visible amount of rotation over a few decades? • Continuous spectra • Hypothesis 1: Swirling clouds of fluid, possibly forming new solar s ...
... What are the spiral and elliptical nebulae? • No individual stars are visible, even in largest telescopes • Some have spiral structure, as if spinning rapidly • Visible amount of rotation over a few decades? • Continuous spectra • Hypothesis 1: Swirling clouds of fluid, possibly forming new solar s ...
Homework #1 Questions
... Question for Review #2: How do we know our galaxy is a flat disk? Question for Review #4: What effects did dust have on the determination of the size of the Milky Way? Problem #1: How long does it take light from the center of the Milky Way, 8 kpc away, to reach the Solar System? Unit 71 Question fo ...
... Question for Review #2: How do we know our galaxy is a flat disk? Question for Review #4: What effects did dust have on the determination of the size of the Milky Way? Problem #1: How long does it take light from the center of the Milky Way, 8 kpc away, to reach the Solar System? Unit 71 Question fo ...
Milky Way
The Milky Way is the galaxy that contains our Solar System. Its name ""milky"" is derived from its appearance as a dim glowing band arching across the night sky whose individual stars cannot be distinguished by the naked eye. The term ""Milky Way"" is a translation of the Latin via lactea, from the Greek γαλαξίας κύκλος (galaxías kýklos, ""milky circle""). From Earth the Milky Way appears as a band because its disk-shaped structure is viewed from within. Galileo Galilei first resolved the band of light into individual stars with his telescope in 1610. Until the early 1920s most astronomers thought that the Milky Way contained all the stars in the Universe. Following the 1920 Great Debate between the astronomers Harlow Shapley and Heber Curtis, observations by Edwin Hubble showed that the Milky Way is just one of many galaxies—now known to number in the billions.The Milky Way is a barred spiral galaxy that has a diameter usually considered to be roughly 100,000–120,000 light-years but may be 150,000–180,000 light-years. The Milky Way is estimated to contain 100–400 billion stars, although this number may be as high as one trillion. There are probably at least 100 billion planets in the Milky Way. The Solar System is located within the disk, about 27,000 light-years from the Galactic Center, on the inner edge of one of the spiral-shaped concentrations of gas and dust called the Orion Arm. The stars in the inner ≈10,000 light-years form a bulge and one or more bars that radiate from the bulge. The very center is marked by an intense radio source, named Sagittarius A*, which is likely to be a supermassive black hole.Stars and gases at a wide range of distances from the Galactic Center orbit at approximately 220 kilometers per second. The constant rotation speed contradicts the laws of Keplerian dynamics and suggests that much of the mass of the Milky Way does not emit or absorb electromagnetic radiation. This mass has been given the name ""dark matter"". The rotational period is about 240 million years at the position of the Sun. The Milky Way as a whole is moving at a velocity of approximately 600 km per second with respect to extragalactic frames of reference. The oldest stars in the Milky Way are nearly as old as the Universe itself and thus must have formed shortly after the Big Bang.The Milky Way has several satellite galaxies and is part of the Local Group of galaxies, which is a component of the Virgo Supercluster, which again is a component of the Laniakea Supercluster.