Astronomy 12: Introduction to Astronomy
... b. The region on the H-R diagram where, once they are formed. new stars rest for most of their lives. c. The sequence of events a star follows from its formation to supernova. d. The region on the H-R diagram where protostars first appear. 3. Define hydrogen burning. a. The formation of a hydrogen g ...
... b. The region on the H-R diagram where, once they are formed. new stars rest for most of their lives. c. The sequence of events a star follows from its formation to supernova. d. The region on the H-R diagram where protostars first appear. 3. Define hydrogen burning. a. The formation of a hydrogen g ...
stars
... Key Properties • Strong, radiatively driven stellar winds ---Mdot ~ 10-10 to 10-6 MO/yr; v > 1000 km/s – Driven by line-scattering of the star’s radiation ...
... Key Properties • Strong, radiatively driven stellar winds ---Mdot ~ 10-10 to 10-6 MO/yr; v > 1000 km/s – Driven by line-scattering of the star’s radiation ...
Powerpoint of lecture 1
... Then find distances to all, if know distance of one, by this “mainsequence fitting” procedure Mean MS is narrow – suggests it is defined by a single parameter ...
... Then find distances to all, if know distance of one, by this “mainsequence fitting” procedure Mean MS is narrow – suggests it is defined by a single parameter ...
Stellar Life Stages
... •low-mass stars and medium mass stars use up their hydrogen and collapse into a white dwarf ...
... •low-mass stars and medium mass stars use up their hydrogen and collapse into a white dwarf ...
stars and constellations
... the axis will only point at Polaris for a few hundred years, then, another star will be “North”. The ancient Egyptians could not have used Polaris as a compass. Why stars “move” ...
... the axis will only point at Polaris for a few hundred years, then, another star will be “North”. The ancient Egyptians could not have used Polaris as a compass. Why stars “move” ...
Document
... 1. It has been determined that all stars have the same general composition (90% H, 9% He, trace amounts of heavy elements). If this is the case, explain why stars of different temperatures show different spectral line patterns. ...
... 1. It has been determined that all stars have the same general composition (90% H, 9% He, trace amounts of heavy elements). If this is the case, explain why stars of different temperatures show different spectral line patterns. ...
Almach or Alberio
... Imagine seeing the stars of Alberio, but much closer together, both in separation on the sky and in true distance from each other. The pair's primary is a giant golden star which has a diameter 80 times that of our Sun (large enough to swallow the orbit of Venus) and a luminosity 2,000 times that of ...
... Imagine seeing the stars of Alberio, but much closer together, both in separation on the sky and in true distance from each other. The pair's primary is a giant golden star which has a diameter 80 times that of our Sun (large enough to swallow the orbit of Venus) and a luminosity 2,000 times that of ...
We Are All Star Dust - High School of Language and Innovation
... • Temperature inside of the core of the Sun = 27,000,000°F • Most of the universe is made from hydrogen and helium ...
... • Temperature inside of the core of the Sun = 27,000,000°F • Most of the universe is made from hydrogen and helium ...
September Evening Skies
... Two open or galactic clusters are noted: M7 between the Teapot and tail of Scorpius, and the Double Cluster in Perseus. Two globular clusters, more compact concentrations of hundreds of thousands of stars, can be found: M13 in Hercules and M22 in Sagittarius. M8 in Sagittarius is the Lagoon Nebula, ...
... Two open or galactic clusters are noted: M7 between the Teapot and tail of Scorpius, and the Double Cluster in Perseus. Two globular clusters, more compact concentrations of hundreds of thousands of stars, can be found: M13 in Hercules and M22 in Sagittarius. M8 in Sagittarius is the Lagoon Nebula, ...
Earth Science, 10th edition Chapter 23: Beyond Our Solar System I
... a. Weighs 100 million tons b. Same density as an atomic nucleus 5. Strong magnetic field 6. First one discovered in early 1970s a. Pulsar (pulsating radio source) b. Found in the Crab nebula (remnant of an A.D. 1054 supernova) C. Black hole 1. More dense than a neutron star 2. Intense surface gravi ...
... a. Weighs 100 million tons b. Same density as an atomic nucleus 5. Strong magnetic field 6. First one discovered in early 1970s a. Pulsar (pulsating radio source) b. Found in the Crab nebula (remnant of an A.D. 1054 supernova) C. Black hole 1. More dense than a neutron star 2. Intense surface gravi ...
The Sun Compared to Other Stars
... Fusion of hydrogen into helium Core hydrogen ends, star collapses, hydrogen fusion begins in outer shell Core continues to collapse, outer shell expands because of hydrogen fusion, star becomes luminous Core becomes degenerate (sustained by electron pressure), outer shell dumps helium ash onto core ...
... Fusion of hydrogen into helium Core hydrogen ends, star collapses, hydrogen fusion begins in outer shell Core continues to collapse, outer shell expands because of hydrogen fusion, star becomes luminous Core becomes degenerate (sustained by electron pressure), outer shell dumps helium ash onto core ...
chapter10
... The Deaths of Massive Stars: Supernovae Final stages of fusion in high-mass stars (> 8 Msun), leading to the formation of an iron core, happen extremely rapidly: Si burning lasts only for ~ 1 day. Iron core ultimately collapses, triggering an explosion that destroys the star: ...
... The Deaths of Massive Stars: Supernovae Final stages of fusion in high-mass stars (> 8 Msun), leading to the formation of an iron core, happen extremely rapidly: Si burning lasts only for ~ 1 day. Iron core ultimately collapses, triggering an explosion that destroys the star: ...
key vocabulary - El blog del Séneca
... planets, satellites, asteroids, comets and meteorites ) Star: A celestial body made of gas. It has a spherical shape. It produces heat and light. Natural satellite: small celestial bodies that revolve around planets. For example: the Moon. Asteroid: They are bodies of rock. Comet: They are bodies of ...
... planets, satellites, asteroids, comets and meteorites ) Star: A celestial body made of gas. It has a spherical shape. It produces heat and light. Natural satellite: small celestial bodies that revolve around planets. For example: the Moon. Asteroid: They are bodies of rock. Comet: They are bodies of ...
21-2 - Laconia School District
... Describe how astronomers measure distances to stars. • Astronomers measure distance from a star with a parallax. A parallax is a apparent change in position of an object when you look at it from different places. This means that if you stick your thumb out and close one eye, it will be in a spot. T ...
... Describe how astronomers measure distances to stars. • Astronomers measure distance from a star with a parallax. A parallax is a apparent change in position of an object when you look at it from different places. This means that if you stick your thumb out and close one eye, it will be in a spot. T ...
PH507 - University of Kent
... 4. The apparent magnitude of a star is modified by the extinction A() according to: m() = M() + 5 log d – 5 + A(). Determine the extinction which would produce an optical depth of 10. ...
... 4. The apparent magnitude of a star is modified by the extinction A() according to: m() = M() + 5 log d – 5 + A(). Determine the extinction which would produce an optical depth of 10. ...
The Fate of Massive Stars
... •Classification by Spectral Lines and Light Curve Shape •Brightness to rival entire galaxies •What is happening? ...
... •Classification by Spectral Lines and Light Curve Shape •Brightness to rival entire galaxies •What is happening? ...
Astronomy – Studying the Stars & Space
... left • Final stage of a star’s life • Can shine for billions of years before they cool completely ...
... left • Final stage of a star’s life • Can shine for billions of years before they cool completely ...
Solutions to test #2 taken on Tuesday
... c) ____F____ The convection layer in the Sun is transparent to radiation. d) ____F____ Nuclear fusion is the breaking apart of a heavy atomic nucleus into two smaller nuclei. e) ____T____ No light produced in the core of the Sun ever reaches the surface. f) ____T____ Near the event horizon of a blac ...
... c) ____F____ The convection layer in the Sun is transparent to radiation. d) ____F____ Nuclear fusion is the breaking apart of a heavy atomic nucleus into two smaller nuclei. e) ____T____ No light produced in the core of the Sun ever reaches the surface. f) ____T____ Near the event horizon of a blac ...
Accretion as a Source of Energy
... Some simple order-of-magnitude estimates. For a body of mass M and radius R* the gravitational potential energy released by the accretion of a mass m on its surface: ...
... Some simple order-of-magnitude estimates. For a body of mass M and radius R* the gravitational potential energy released by the accretion of a mass m on its surface: ...
Scientists classify stars by
... The gravity of a passing star or the shock wave from a nearby supernova may cause the nebula to contract. 1. Matter in the gas cloud will begin to come together into a dense region called a protostar. 2. As the protostar continues to condense, it heats up. 3. Eventually, it reaches a critical mass a ...
... The gravity of a passing star or the shock wave from a nearby supernova may cause the nebula to contract. 1. Matter in the gas cloud will begin to come together into a dense region called a protostar. 2. As the protostar continues to condense, it heats up. 3. Eventually, it reaches a critical mass a ...
The Life Cycle of a Star
... Lowmass stars (red dwarfs) consume hydrogen at a very slow rate (~ 100 billion years). During this time, they lose significant mass, and eventually evaporate. The result is a very faint white dwarf. ...
... Lowmass stars (red dwarfs) consume hydrogen at a very slow rate (~ 100 billion years). During this time, they lose significant mass, and eventually evaporate. The result is a very faint white dwarf. ...
Star formation
Star formation is the process by which dense regions within molecular clouds in interstellar space, sometimes referred to as ""stellar nurseries"" or ""star-forming regions"", collapse to form stars. As a branch of astronomy, star formation includes the study of the interstellar medium (ISM) and giant molecular clouds (GMC) as precursors to the star formation process, and the study of protostars and young stellar objects as its immediate products. It is closely related to planet formation, another branch of astronomy. Star formation theory, as well as accounting for the formation of a single star, must also account for the statistics of binary stars and the initial mass function.In June 2015, astronomers reported evidence for Population III stars in the Cosmos Redshift 7 galaxy at z = 6.60. Such stars are likely to have existed in the very early universe (i.e., at high redshift), and may have started the production of chemical elements heavier than hydrogen that are needed for the later formation of planets and life as we know it.