Sizing Up The Universe
... period of variability by observing a number of them in the Small Magellanic Cloud. They were all at approximately the same distance, so their relative luminosity as a function of their period of variability could be determined. From 1923 to 1924 Edwin Hubble (1889–1953) observed the Andromeda galaxy ...
... period of variability by observing a number of them in the Small Magellanic Cloud. They were all at approximately the same distance, so their relative luminosity as a function of their period of variability could be determined. From 1923 to 1924 Edwin Hubble (1889–1953) observed the Andromeda galaxy ...
Stellar Masses
... Hubble’s Law • The prelude to Hubble’s Law was the establishment of measurements of galactic distances and also measurements of their Doppler shifts. • Vesto Slipher [Lowell Observatory] measured the redshifts of many galaxies[nebulae] in the early decades of the 20thC. They were expected to be ran ...
... Hubble’s Law • The prelude to Hubble’s Law was the establishment of measurements of galactic distances and also measurements of their Doppler shifts. • Vesto Slipher [Lowell Observatory] measured the redshifts of many galaxies[nebulae] in the early decades of the 20thC. They were expected to be ran ...
Stellar Evolution (Formation)
... Sun has enough H in its core to produce energy for about 1010 yrs. (It is about halfway through its life now.) When the core’s H is exhausted, there will be no more nuclear energy to heat the gas. Gravity will win over gas pressure and the core will collapse. Gravitational potential energy of th ...
... Sun has enough H in its core to produce energy for about 1010 yrs. (It is about halfway through its life now.) When the core’s H is exhausted, there will be no more nuclear energy to heat the gas. Gravity will win over gas pressure and the core will collapse. Gravitational potential energy of th ...
VARIATIONS IN SOLAR RADIATION AND THE CAUSE OF ICE AGES
... pass through such a cloud. Now the clouds must necessarily take part with the stars in the general rotatory motion of the galaxy, but superposed on this they will also have their own independent small random motions as do the stars. The galactic rotation involves velocities measured in hundreds of k ...
... pass through such a cloud. Now the clouds must necessarily take part with the stars in the general rotatory motion of the galaxy, but superposed on this they will also have their own independent small random motions as do the stars. The galactic rotation involves velocities measured in hundreds of k ...
27.1: Characteristics of Stars
... Low mass stars with an original mass of less than 8 times the sun (8 solar masses) will become Planetary Nebula. The remnant state of these stars is a white dwarf. High mass stars containing more than 8 solar masses will explode violently as a supernova. The remnant state of these stars is a neutron ...
... Low mass stars with an original mass of less than 8 times the sun (8 solar masses) will become Planetary Nebula. The remnant state of these stars is a white dwarf. High mass stars containing more than 8 solar masses will explode violently as a supernova. The remnant state of these stars is a neutron ...
Extragalactic Astrophysics 1 AA 2011-2012 Prof. LA Antonelli
... reference frame radial velocities easily measurable subtracting solar motion, it is found that Milky Way and M31 approach each other at V~120 km/s most other galaxies have velocities within ~60 km/s from MilkyWay+M31 center of mass, not enough to escape from LG: Local Group represents a typical gala ...
... reference frame radial velocities easily measurable subtracting solar motion, it is found that Milky Way and M31 approach each other at V~120 km/s most other galaxies have velocities within ~60 km/s from MilkyWay+M31 center of mass, not enough to escape from LG: Local Group represents a typical gala ...
Lecture 2
... much longer than that (it is about half way through its 10 billion year life) because it gets energy from nuclear reactions in its core, but when this source runs it will contract to become a white dwarf. It is the same for all other stars and in fact the more massive ones have much shorter lives wh ...
... much longer than that (it is about half way through its 10 billion year life) because it gets energy from nuclear reactions in its core, but when this source runs it will contract to become a white dwarf. It is the same for all other stars and in fact the more massive ones have much shorter lives wh ...
ASTR 1010 – Spring 2016 – Study Notes Dr. Magnani
... should change as the Earth went part of the way around its orbit. Since no observed shift in position is detected with the naked eye over many months, the Earth could not be moving around t ...
... should change as the Earth went part of the way around its orbit. Since no observed shift in position is detected with the naked eye over many months, the Earth could not be moving around t ...
Death of High Mass Stars
... • Some of the energy creates elements heavier than iron. These elements are distributed to the rest of the galaxy. ...
... • Some of the energy creates elements heavier than iron. These elements are distributed to the rest of the galaxy. ...
AIM: HOW DO STARS FORM?
... 6. The moon is a natural satellite that has (give a fraction) less the gravitational pull of the Earth. 7. During what month is the Earth experiencing ...
... 6. The moon is a natural satellite that has (give a fraction) less the gravitational pull of the Earth. 7. During what month is the Earth experiencing ...
File - YEAR 11 EBSS PHYSICS DETAILED STUDIES
... different temperatures, from O0 (hottest) to M9 (coolest). The reason for the changes between the classes was to do with some atoms becoming ionised at various temperature and at cooler temperature the light may not have sufficient energy to excite the atoms to create spectral lines. This meant th ...
... different temperatures, from O0 (hottest) to M9 (coolest). The reason for the changes between the classes was to do with some atoms becoming ionised at various temperature and at cooler temperature the light may not have sufficient energy to excite the atoms to create spectral lines. This meant th ...
Life Cycle of a Star - CullenScience
... Protostars and the Nebula 1. A_____________________is a cloud of dust and gas, composed primarily of hydrogen (97%) and helium (3%). 2. Adding atoms to the center of a protostar is a process astronomers call _______________. 3. In order to achieve life as a star, the protostar will need to achieve a ...
... Protostars and the Nebula 1. A_____________________is a cloud of dust and gas, composed primarily of hydrogen (97%) and helium (3%). 2. Adding atoms to the center of a protostar is a process astronomers call _______________. 3. In order to achieve life as a star, the protostar will need to achieve a ...
01 - Ionia Public Schools
... _____ 8. Gravitational force increases as the mass of an object a. decreases or as the distance between two objects decreases. b. increases or as the distance between two objects increases. c. increases or as the distance between two objects decreases. d. decreases or as the distance between two obj ...
... _____ 8. Gravitational force increases as the mass of an object a. decreases or as the distance between two objects decreases. b. increases or as the distance between two objects increases. c. increases or as the distance between two objects decreases. d. decreases or as the distance between two obj ...
A Sense of Scale - Young Scientists Journal
... Sloan Digital Sky Survey which discovered it) spanning 1.37 billion light years. Now this is truly huge, but considering that an estimate for the minimum size of the Universe is 78 billion light years, there’s still a lot of space to fill. Unfortunately, lots of this space isn’t filled. Voids in spa ...
... Sloan Digital Sky Survey which discovered it) spanning 1.37 billion light years. Now this is truly huge, but considering that an estimate for the minimum size of the Universe is 78 billion light years, there’s still a lot of space to fill. Unfortunately, lots of this space isn’t filled. Voids in spa ...
Mon Aug 5, 2013 QUASAR DISCOVERY Quasars were discovered
... eye. Quasars may appear dim, but that’s because they’re really far away, 10 to 15 billion light years out. 3C273 actually puts out more energy than the combined light of the hundreds of billions of stars of our entire Milky Way, and this from an object only the size of our solar system! We think qua ...
... eye. Quasars may appear dim, but that’s because they’re really far away, 10 to 15 billion light years out. 3C273 actually puts out more energy than the combined light of the hundreds of billions of stars of our entire Milky Way, and this from an object only the size of our solar system! We think qua ...
Surveys of Stars, The interstellar medium
... For example, if the mass of a star is doubled, its luminosity increases by a factor 23.5 ~ 11. Thus, stars like Sirius that are about twice as massive as the Sun are about 11 times as luminous. The more massive a Main Sequence star is, the hotter (bluer), and more luminous. The Main Sequence is a ma ...
... For example, if the mass of a star is doubled, its luminosity increases by a factor 23.5 ~ 11. Thus, stars like Sirius that are about twice as massive as the Sun are about 11 times as luminous. The more massive a Main Sequence star is, the hotter (bluer), and more luminous. The Main Sequence is a ma ...
Astronomy
... Neutron stars, medium stars (5 X our sun) A supernova occurs when a supergiant star (5 X or more our sun) suddenly explodes Some material rejoins a nebula The remaining material from the star (or core) is a neutron star Neutron stars are even smaller and more dense than white dwarfs Some neutron sta ...
... Neutron stars, medium stars (5 X our sun) A supernova occurs when a supergiant star (5 X or more our sun) suddenly explodes Some material rejoins a nebula The remaining material from the star (or core) is a neutron star Neutron stars are even smaller and more dense than white dwarfs Some neutron sta ...
Mars Project
... The mass of a star will tell you how long it will live. You may think that if a star is bigger it lasts longer. But you are wrong. Its kind of like a car the smaller it is the longer it lasts. If the star is very small it will live for about 200billion years. If it is a medium size (like the sun) ...
... The mass of a star will tell you how long it will live. You may think that if a star is bigger it lasts longer. But you are wrong. Its kind of like a car the smaller it is the longer it lasts. If the star is very small it will live for about 200billion years. If it is a medium size (like the sun) ...
Stellar kinematics
Stellar kinematics is the study of the movement of stars without needing to understand how they acquired their motion. This differs from stellar dynamics, which takes into account gravitational effects. The motion of a star relative to the Sun can provide useful information about the origin and age of a star, as well as the structure and evolution of the surrounding part of the Milky Way.In astronomy, it is widely accepted that most stars are born within molecular clouds known as stellar nurseries. The stars formed within such a cloud compose open clusters containing dozens to thousands of members. These clusters dissociate over time. Stars that separate themselves from the cluster's core are designated as members of the cluster's stellar association. If the remnant later drifts through the Milky Way as a coherent assemblage, then it is termed a moving group.