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... discovered that each of these is itself double. Castor thus consists of 3 pairs of stars, with each pair of stars orbiting each other with periods of 20 hours to 9 days, the two bright pairs orbiting each other every 400 years, and the dim pair orbiting the other two over many thousands of years. Th ...
... discovered that each of these is itself double. Castor thus consists of 3 pairs of stars, with each pair of stars orbiting each other with periods of 20 hours to 9 days, the two bright pairs orbiting each other every 400 years, and the dim pair orbiting the other two over many thousands of years. Th ...
Sample - Physics @ IUPUI
... • D) stops spinning 11) What are pulsars? • A) rapidly spinning neutron stars • B) rapidly spinning black holes • C) stars that change temperature rapidly • D) stars that change size rapidly 12) Where does the energy that pulsars emit come from? • A) heat • B) fusion • C) gravity • D) spin 13) If we ...
... • D) stops spinning 11) What are pulsars? • A) rapidly spinning neutron stars • B) rapidly spinning black holes • C) stars that change temperature rapidly • D) stars that change size rapidly 12) Where does the energy that pulsars emit come from? • A) heat • B) fusion • C) gravity • D) spin 13) If we ...
Galaxy Classification - Starry Night Education
... Milky Way galaxy? a. The plane of the solar system is coincident with the plane of the galaxy. b. The plane of the solar system is perpendicular to that of the Milky Way. c. The plane of the solar system is inclined at a small angle to the plane of the galaxy. d. The angle between the plane of the s ...
... Milky Way galaxy? a. The plane of the solar system is coincident with the plane of the galaxy. b. The plane of the solar system is perpendicular to that of the Milky Way. c. The plane of the solar system is inclined at a small angle to the plane of the galaxy. d. The angle between the plane of the s ...
The Hubble Space Telescope - the first 10 years
... • If you move an object away it gets fainter • Once its 10x further away it is 100x fainter • Hence if we know how bright a star SHOULD be and we measure how bright it ACTUALLY is we can estimate the distance • This relies on finding stars with KNOWN brightness and luckily their exist a class of sta ...
... • If you move an object away it gets fainter • Once its 10x further away it is 100x fainter • Hence if we know how bright a star SHOULD be and we measure how bright it ACTUALLY is we can estimate the distance • This relies on finding stars with KNOWN brightness and luckily their exist a class of sta ...
The human race has made great strides in the last few centuries
... Most of the mass of the Milky Way is hidden in dark matter that envelopes the entire galaxy and drops very slowly in density with radius. The first stars to form were in the Globular Clustes – about 100 dense clusters of up to a million stars that surround the Milky Way in a large sphere. Then there ...
... Most of the mass of the Milky Way is hidden in dark matter that envelopes the entire galaxy and drops very slowly in density with radius. The first stars to form were in the Globular Clustes – about 100 dense clusters of up to a million stars that surround the Milky Way in a large sphere. Then there ...
Neutron Stars and Black Holes - School
... Before any evidence of black holes existed they were known to be a theoretical possibility. After a supernova explosion there remains an incredibly dense neutron star. If the mass of the Sun from which it originated was great enough then the neutron star could be a black hole. The gravitational fiel ...
... Before any evidence of black holes existed they were known to be a theoretical possibility. After a supernova explosion there remains an incredibly dense neutron star. If the mass of the Sun from which it originated was great enough then the neutron star could be a black hole. The gravitational fiel ...
1 - BYU Physics and Astronomy
... its least mass just prior to the onset of mass infusion from its evolving companion, (d) the core of a type II supernova reaches its minimum size just before it "bounces," (e) there were almost no observed sunspots for several decades. 71. Most (perhaps all) of the heavy atoms in human bodies (a) ha ...
... its least mass just prior to the onset of mass infusion from its evolving companion, (d) the core of a type II supernova reaches its minimum size just before it "bounces," (e) there were almost no observed sunspots for several decades. 71. Most (perhaps all) of the heavy atoms in human bodies (a) ha ...
FINAL EXAM Name: ASTRONOMY II - 79202 Spring 1995
... to the known value of the sun’s age. Assume 1% efficiency to convert gravitational potential energy to luminosity. ...
... to the known value of the sun’s age. Assume 1% efficiency to convert gravitational potential energy to luminosity. ...
Chapter 16 - "The Universe"
... • The nearest galaxy to the Milky Way • 80,000 light years from our solar system • A dwarf galaxy as it is only 1,000 light years across ...
... • The nearest galaxy to the Milky Way • 80,000 light years from our solar system • A dwarf galaxy as it is only 1,000 light years across ...
ONLINE practice exam
... 2. A supernova goes off in a galaxy whose cosmological redshift is z =0.2. From its maximum brightness, astronomers determine that it is located at a distance of 1000 Mpc. (a) What is the observed wavelength of the HI spectral line from this galaxy? (The rest wavelength is 21.1cm) (b) Use this info ...
... 2. A supernova goes off in a galaxy whose cosmological redshift is z =0.2. From its maximum brightness, astronomers determine that it is located at a distance of 1000 Mpc. (a) What is the observed wavelength of the HI spectral line from this galaxy? (The rest wavelength is 21.1cm) (b) Use this info ...
Great Migrations & other natural history tales
... way M_Jeans changes w.r.t. the fragment mass, Hoyle (1953) arrived at a concept of opacity-limited fragmentation. When heat gets trapped by opacity, Jeans mass ...
... way M_Jeans changes w.r.t. the fragment mass, Hoyle (1953) arrived at a concept of opacity-limited fragmentation. When heat gets trapped by opacity, Jeans mass ...
ASTR100 Homework #5 Solutions Chapter 11 #29, 31 Due
... If you could look inside the Sun today, you’d find that its core contains a much higher proportion of helium and a lower proportion of hydrogen than it did when the Sun was born. This statement makes sense because over the last 4.5 billion years the Sun has been busy converting its Hydrogen into Hel ...
... If you could look inside the Sun today, you’d find that its core contains a much higher proportion of helium and a lower proportion of hydrogen than it did when the Sun was born. This statement makes sense because over the last 4.5 billion years the Sun has been busy converting its Hydrogen into Hel ...
distance to the centre of the Milky Way.
... Northern Hemisphere, so the southern skies were not well known. The early work was necessarily done ‘by eye’ since there were no photographic ...
... Northern Hemisphere, so the southern skies were not well known. The early work was necessarily done ‘by eye’ since there were no photographic ...
The Origin of the Solar System
... Clouds => Stars do not form isolated, but in large groups, called Open Clusters of Stars. Open Cluster M7 ...
... Clouds => Stars do not form isolated, but in large groups, called Open Clusters of Stars. Open Cluster M7 ...
STUDY GUIDE FOR CHAPTER 1
... core and the generation of a shock wave. B. However the outer layers of the star are thought to have so much material in them that they can absorb the shock wave and the star does not blow up. C. The core consists of neutrons held up by neutron degeneracy pressure. D. As material from the outer laye ...
... core and the generation of a shock wave. B. However the outer layers of the star are thought to have so much material in them that they can absorb the shock wave and the star does not blow up. C. The core consists of neutrons held up by neutron degeneracy pressure. D. As material from the outer laye ...
Stars
... • Most average stars will blow away their outer atmospheres to form a planetary nebula (ionized gas emission) • Cores will remain behind and burn as a white dwarf until they cool down • What will be left is a dark ball of matter known as a black dwarf ...
... • Most average stars will blow away their outer atmospheres to form a planetary nebula (ionized gas emission) • Cores will remain behind and burn as a white dwarf until they cool down • What will be left is a dark ball of matter known as a black dwarf ...
SO FAR:
... SO FAR: • Galaxy types • Ancient history • Properties of Interstellar Dust • Milky Way and spiral galaxy morphology • Nuclear bulge • Disk • Stellar halo • Dark matter halo • Chemical enrichment • Measuring chemical abundances – Absorption lines (stars) – Continuum energy distributions (stars) – Emi ...
... SO FAR: • Galaxy types • Ancient history • Properties of Interstellar Dust • Milky Way and spiral galaxy morphology • Nuclear bulge • Disk • Stellar halo • Dark matter halo • Chemical enrichment • Measuring chemical abundances – Absorption lines (stars) – Continuum energy distributions (stars) – Emi ...
Origin of Planetary Systems
... Fig. 4. Photographs of star-forming regions taken by the famous Hubble Space Telescope. (a) The famous Orion Nebula, one of the many current sites of star formation in our Galaxy (Milky Way or Akashganga). This particular nebula is very well studied by astronomers because of its relative proximity t ...
... Fig. 4. Photographs of star-forming regions taken by the famous Hubble Space Telescope. (a) The famous Orion Nebula, one of the many current sites of star formation in our Galaxy (Milky Way or Akashganga). This particular nebula is very well studied by astronomers because of its relative proximity t ...
Test - Hampton Science 8A 8B 8C 8D 8E Stars are classified on the
... 21. Name the common Isostope of Hydrogen that contains one Neutron. 22. Which celestial body creates all of the elements “heavier” than Hydrogen? 23. Identify the process that creates “heavier” elements out of “lighter” elements. 24. Identify the force that drives fusion. 25. Identify the Latin word ...
... 21. Name the common Isostope of Hydrogen that contains one Neutron. 22. Which celestial body creates all of the elements “heavier” than Hydrogen? 23. Identify the process that creates “heavier” elements out of “lighter” elements. 24. Identify the force that drives fusion. 25. Identify the Latin word ...
ISP 205 Review Questions, Week 10
... Why don’t all of the pieces just pull themselves together into an infinitesimally small clump at the center? Gas pressure holds the Sun up. The individual atoms inside the sun are flying around in random directions and constantly bouncing off each other in new random directions. This keeps them from ...
... Why don’t all of the pieces just pull themselves together into an infinitesimally small clump at the center? Gas pressure holds the Sun up. The individual atoms inside the sun are flying around in random directions and constantly bouncing off each other in new random directions. This keeps them from ...
Stars: Their Life and Afterlife
... not only tend to form close together in space, but also in time – and so, for massive stars, they will also die relatively close together in space and time. Superbubbles form from OB associations. OB associations are clusters of massive stars of spectral types – you guessed it – O and B. • O stars a ...
... not only tend to form close together in space, but also in time – and so, for massive stars, they will also die relatively close together in space and time. Superbubbles form from OB associations. OB associations are clusters of massive stars of spectral types – you guessed it – O and B. • O stars a ...
Galaxy Independent Study Assignment
... appearance of the arms. The spiral arms, which wrap around the bulge, contain many young blue stars and lots of gas and dust. Stars in the bulge tend to be older and redder. Yellow stars like our Sun are found throughout the disk of a spiral galaxy. These galaxies rotate somewhat like a hurricane or ...
... appearance of the arms. The spiral arms, which wrap around the bulge, contain many young blue stars and lots of gas and dust. Stars in the bulge tend to be older and redder. Yellow stars like our Sun are found throughout the disk of a spiral galaxy. These galaxies rotate somewhat like a hurricane or ...
Johnathan - WordPress.com
... perhaps 37,000 lightyears across. There are vast gas clouds in this galaxy, where stars are being born at an incredible rate. ...
... perhaps 37,000 lightyears across. There are vast gas clouds in this galaxy, where stars are being born at an incredible rate. ...
File - Mr. Goodyear Astronomy
... stage. Stars are said to be in Hydrostatic Equilibrium: energy output = gravitational pull inward (known as hydrogen burning stage) Stars like our sun last 10 billion years as a main sequence ...
... stage. Stars are said to be in Hydrostatic Equilibrium: energy output = gravitational pull inward (known as hydrogen burning stage) Stars like our sun last 10 billion years as a main sequence ...
H II region
An H II region is a large, low-density cloud of partially ionized gas in which star formation has recently taken place. The short-lived blue stars forged in these regions emit copious amounts of ultraviolet light that ionize the surrounding gas. H II regions—sometimes several hundred light-years across—are often associated with giant molecular clouds. The first known H II region was the Orion Nebula, which was discovered in 1610 by Nicolas-Claude Fabri de Peiresc.H II regions are named for the large amount of ionised atomic hydrogen they contain, referred to as H II, pronounced H-two by astronomers (an H I region being neutral atomic hydrogen, and H2 being molecular hydrogen). Such regions have extremely diverse shapes, because the distribution of the stars and gas inside them is irregular. They often appear clumpy and filamentary, sometimes showing bizarre shapes such as the Horsehead Nebula. H II regions may give birth to thousands of stars over a period of several million years. In the end, supernova explosions and strong stellar winds from the most massive stars in the resulting star cluster will disperse the gases of the H II region, leaving behind a cluster of birthed stars such as the Pleiades.H II regions can be seen to considerable distances in the universe, and the study of extragalactic H II regions is important in determining the distance and chemical composition of other galaxies. Spiral and irregular galaxies contain many H II regions, while elliptical galaxies are almost devoid of them. In the spiral galaxies, including the Milky Way, H II regions are concentrated in the spiral arms, while in the irregular galaxies they are distributed chaotically. Some galaxies contain huge H II regions, which may contain tens of thousands of stars. Examples include the 30 Doradus region in the Large Magellanic Cloud and NGC 604 in the Triangulum Galaxy.