Volume 36 Number 10 October 2010 Jeremiah Baker
... micron instead of 0.1 micron (a typical human hair is about 100 microns). That might not sound like a big difference, but it can significantly change astronomers' models of star and planet formation. For one thing, the larger grain size means that planets -- which form as dust circling young stars s ...
... micron instead of 0.1 micron (a typical human hair is about 100 microns). That might not sound like a big difference, but it can significantly change astronomers' models of star and planet formation. For one thing, the larger grain size means that planets -- which form as dust circling young stars s ...
Star Systems and Galaxies
... • Contain very little gas and dust between stars • Old stars because little gas or dust and no stars are forming any longer ...
... • Contain very little gas and dust between stars • Old stars because little gas or dust and no stars are forming any longer ...
The Milky Way - Cobb Learning
... 1. Galaxies are the building blocks of the universe! 2. Milky way is 100,000 ly across 3. 300 billion stars Galactic Plane 4. 13 billion years old 5. Greek (galaxías kýklos, "milky circle") 6. Spiral arms are made of gas, dust and stars Galactic Center 7. Nuclear bulge has billions of stars 8. Disk ...
... 1. Galaxies are the building blocks of the universe! 2. Milky way is 100,000 ly across 3. 300 billion stars Galactic Plane 4. 13 billion years old 5. Greek (galaxías kýklos, "milky circle") 6. Spiral arms are made of gas, dust and stars Galactic Center 7. Nuclear bulge has billions of stars 8. Disk ...
Guide to the Stars Poster PDF
... billion stars. Recently, however, this number was upped by about a billion after the discovery that very old, nearly invisible stars had escaped earlier detections. The Milky Way is believed to contain four major spiral arms, all of which start at the galaxy's centre, plus a number of smaller arms. ...
... billion stars. Recently, however, this number was upped by about a billion after the discovery that very old, nearly invisible stars had escaped earlier detections. The Milky Way is believed to contain four major spiral arms, all of which start at the galaxy's centre, plus a number of smaller arms. ...
Where in the Milky Way Are We
... Galaxies like the Milky Way have objects, called “globular clusters” that exist in the outer regions of the galaxy (or halo). Globular clusters are dense clusters of stars that are generally free of gas and dust. In galaxies like the Milky Way, the gas and dust are located primarily in the disk. If ...
... Galaxies like the Milky Way have objects, called “globular clusters” that exist in the outer regions of the galaxy (or halo). Globular clusters are dense clusters of stars that are generally free of gas and dust. In galaxies like the Milky Way, the gas and dust are located primarily in the disk. If ...
Light travels 300,000 kilometers per second. The Moon is 384,000
... Could we observe a galaxy that is 20 billion light-years from us? A. Yes, if we had a large enough telescope. B. No, because its light is still travelling to us. C. No. We cannot see outside of the Milky Way. ...
... Could we observe a galaxy that is 20 billion light-years from us? A. Yes, if we had a large enough telescope. B. No, because its light is still travelling to us. C. No. We cannot see outside of the Milky Way. ...
HW13_Answers
... the stars that are present in the components. The three main components are the disk, the bulge and the halo. The disk has stars, gas and dust. It is the location where star formation is occurring. Because of this the light coming from the disk of the galaxy is extra blue in color. This is due to th ...
... the stars that are present in the components. The three main components are the disk, the bulge and the halo. The disk has stars, gas and dust. It is the location where star formation is occurring. Because of this the light coming from the disk of the galaxy is extra blue in color. This is due to th ...
Slide 1
... Emit radio waves, IR, visible, X rays Most luminous objects (like 20 trillion suns) Larger & more massive than any known star Radiate light and radio waves at high rates May be whole galaxies in early stage of development, but so distant that we can’t see the galaxy itself. ...
... Emit radio waves, IR, visible, X rays Most luminous objects (like 20 trillion suns) Larger & more massive than any known star Radiate light and radio waves at high rates May be whole galaxies in early stage of development, but so distant that we can’t see the galaxy itself. ...
Astronomy Galaxies Quiz – Study Guide You will be given a set of
... 16. Old galaxies are ______________ (what color?) and contain (a little or a lot) of dust. 17. Compare open and globular star clusters: Which are bigger? ___________Which contain mostly young stars? _____________ Which are found in the arms of spiral galaxies? ____________ In the Halo? _____________ ...
... 16. Old galaxies are ______________ (what color?) and contain (a little or a lot) of dust. 17. Compare open and globular star clusters: Which are bigger? ___________Which contain mostly young stars? _____________ Which are found in the arms of spiral galaxies? ____________ In the Halo? _____________ ...
Galaxies[1] - salendinenookphysics
... When we look into the night sky we can see many stars with our naked eye, we see stars in our galaxy, the Milky Way. Scientists believe the Milky Way is just one of many galaxies. It is thought there are hundreds of billions of galaxies. ...
... When we look into the night sky we can see many stars with our naked eye, we see stars in our galaxy, the Milky Way. Scientists believe the Milky Way is just one of many galaxies. It is thought there are hundreds of billions of galaxies. ...
Organizing the cosmos
... smudge on a moonless night, it is one of the farthest objects visible to the naked eye, and can be seen even from urban areas with binoculars 2.3 million ly away ...
... smudge on a moonless night, it is one of the farthest objects visible to the naked eye, and can be seen even from urban areas with binoculars 2.3 million ly away ...
Intro to Astronomy Power Point
... Irregular galaxies lack any specific form and contain stars, gas and dust generally associated with a youth. The irregular galaxy at right is the Large Magellanic Cloud, a satellite of the Milky Way located about 180,000 light years from the sun. The LMC is about 60,000 light years across. The brigh ...
... Irregular galaxies lack any specific form and contain stars, gas and dust generally associated with a youth. The irregular galaxy at right is the Large Magellanic Cloud, a satellite of the Milky Way located about 180,000 light years from the sun. The LMC is about 60,000 light years across. The brigh ...
AY1 Homework for Quiz 3: Spring 2017
... 13. What is believed to be the source of energy for QSOs and Active Galactic Nuclei radiation (check all that are true)? ___ material being heated as it is falling into a supermassive black hole ...
... 13. What is believed to be the source of energy for QSOs and Active Galactic Nuclei radiation (check all that are true)? ___ material being heated as it is falling into a supermassive black hole ...
Galaxies
... galaxy is a huge region of space that contains hundreds of billions of stars, planets, glowing nebulae, dust, empty space, and possibly black holes. ...
... galaxy is a huge region of space that contains hundreds of billions of stars, planets, glowing nebulae, dust, empty space, and possibly black holes. ...
Document
... If we were traveling at the speed of light, it would take us _________ to reach ________. 1 second ...
... If we were traveling at the speed of light, it would take us _________ to reach ________. 1 second ...
The Milky Way
... II. Observe objects at wavelengths other than visible (to circumvent the problem of optical obscuration), and catalogue their directions and ...
... II. Observe objects at wavelengths other than visible (to circumvent the problem of optical obscuration), and catalogue their directions and ...
The Milky Way
... II. Observe objects at wavelengths other than visible (to circumvent the problem of optical obscuration), and catalogue their directions and ...
... II. Observe objects at wavelengths other than visible (to circumvent the problem of optical obscuration), and catalogue their directions and ...
The Milky Way Galaxy Chapter 15 Guidepost Guidepost
... Many absorption lines also from heavier elements (metals): Population At the time of formation, the gases forming the Milky Way ...
... Many absorption lines also from heavier elements (metals): Population At the time of formation, the gases forming the Milky Way ...
Chapter 30.3 Star Groups
... • Takes sun 225 million years to complete one orbit. • Closest galaxies are 170,000 l.y. away from Earth. ...
... • Takes sun 225 million years to complete one orbit. • Closest galaxies are 170,000 l.y. away from Earth. ...
Galaxies Quiz – Study Guide KEY You will be given a set of images
... 16. Old galaxies are __YELLOW___ (what color?) and contain (a little or a lot) of dust. 17. Compare open and globular star clusters: Which are bigger? __GLOBULAR__Which contain mostly young stars? _____OPEN__ Which are found in the arms of spiral galaxies? ____OPEN In the Halo? ___GLOBULAR___ 18. Wh ...
... 16. Old galaxies are __YELLOW___ (what color?) and contain (a little or a lot) of dust. 17. Compare open and globular star clusters: Which are bigger? __GLOBULAR__Which contain mostly young stars? _____OPEN__ Which are found in the arms of spiral galaxies? ____OPEN In the Halo? ___GLOBULAR___ 18. Wh ...
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.