The Hubble Space Telescope
... Shows the early stages of a star Known as the pillars of creation ...
... Shows the early stages of a star Known as the pillars of creation ...
The Sun and other Stars
... When stars like the Sun begin to fuse H to He they fall into the Main sequence stars. The Sun will remain a main sequence star until uses about 90% of its fuel in the core. This is the beginning of the End ...
... When stars like the Sun begin to fuse H to He they fall into the Main sequence stars. The Sun will remain a main sequence star until uses about 90% of its fuel in the core. This is the beginning of the End ...
Approaching a black hole
... 1. Formation of galaxies 2. Collapse of massive stars 3. Early Universe? How to find the object that does not emit any radiation? By its effect on nearby objects! Black hole deflects nearby objects from straight path Accretion of surrounding matter onto black holes generates huge amount of heat and ...
... 1. Formation of galaxies 2. Collapse of massive stars 3. Early Universe? How to find the object that does not emit any radiation? By its effect on nearby objects! Black hole deflects nearby objects from straight path Accretion of surrounding matter onto black holes generates huge amount of heat and ...
Evolved Massive Stars - University of Arizona
... Ýat different radii and is M Teff for different ) ...
... Ýat different radii and is M Teff for different ) ...
17. The Universe
... How was the Solar System formed? The Solar System is about 4.6 billion years old. It was formed from a nebula – an enormous cloud of dust and gas created when a dying star exploded. When shockwaves from other dying stars hit the nebula, it collapsed and formed a globule. Over millions of years, the ...
... How was the Solar System formed? The Solar System is about 4.6 billion years old. It was formed from a nebula – an enormous cloud of dust and gas created when a dying star exploded. When shockwaves from other dying stars hit the nebula, it collapsed and formed a globule. Over millions of years, the ...
universe new
... How was the Solar System formed? The Solar System is about 4.6 billion years old. It was formed from a nebula – an enormous cloud of dust and gas created when a dying star exploded. When shockwaves from other dying stars hit the nebula, it collapsed and formed a globule. Over millions of years, the ...
... How was the Solar System formed? The Solar System is about 4.6 billion years old. It was formed from a nebula – an enormous cloud of dust and gas created when a dying star exploded. When shockwaves from other dying stars hit the nebula, it collapsed and formed a globule. Over millions of years, the ...
Chapter 12
... sort of force stops contraction before the core temperature rises above 107 K. • Thermal pressure cannot stop contraction because the star is constantly losing thermal energy from its surface through radiation. • Is there another form of pressure that can stop ...
... sort of force stops contraction before the core temperature rises above 107 K. • Thermal pressure cannot stop contraction because the star is constantly losing thermal energy from its surface through radiation. • Is there another form of pressure that can stop ...
Astronomy_Stars_n_Galaxies_PowerPoint
... A galaxy is a huge group of single stars, star systems, star clusters, dust, and gas all bound together by gravity. Astronomers classify most galaxies into the following types: Spiral galaxy: appears to have a bulge in the middle and arms that spiral outward like a pinwheel. Our solar system is loca ...
... A galaxy is a huge group of single stars, star systems, star clusters, dust, and gas all bound together by gravity. Astronomers classify most galaxies into the following types: Spiral galaxy: appears to have a bulge in the middle and arms that spiral outward like a pinwheel. Our solar system is loca ...
Our Solar System, Our Galaxy, then the Universe
... of this are referred to as the Kuiper belt, Scattered Objects, and the Oort Cloud. The furthest portion, the Oort Cloud, may reach half way to the nearest star, Proxima Centauri, about 4.2 light years from Earth. While they are widely spread out, the material resources of this region are vast. ...
... of this are referred to as the Kuiper belt, Scattered Objects, and the Oort Cloud. The furthest portion, the Oort Cloud, may reach half way to the nearest star, Proxima Centauri, about 4.2 light years from Earth. While they are widely spread out, the material resources of this region are vast. ...
Lecture 11: Stars, HR diagram.
... There is a very tight relationship between luminosity and temperature We see that the Sun is in this sequence... Then there is something in common between the Sun and the rest of the stars in the main sequence.... They are all burning H into He in their cores More luminous = hotter = more massive! L ...
... There is a very tight relationship between luminosity and temperature We see that the Sun is in this sequence... Then there is something in common between the Sun and the rest of the stars in the main sequence.... They are all burning H into He in their cores More luminous = hotter = more massive! L ...
Neutron Stars and Black Holes
... • Initially thought to be extra terrestrial life • Soon other sources were seen in all different directions, and it was realized that these are actually neutron stars • The regular period is due to the spin of a neutron star emitting radio waves like a lighthouse. • A pulsar was also discovered with ...
... • Initially thought to be extra terrestrial life • Soon other sources were seen in all different directions, and it was realized that these are actually neutron stars • The regular period is due to the spin of a neutron star emitting radio waves like a lighthouse. • A pulsar was also discovered with ...
Astronomy Chapter 16 – The Milky Way Galaxy A. Main Ideas 1
... One of the major unsolved problems in astronomy is how galaxies form • Birth of Population I and II Stars ⇒ The Milky Way probably began as a vast, slowly rotating gas cloud, perhaps a million light-years in diameter and containing about 1011 solar masses. The cloud was composed of almost pure hydro ...
... One of the major unsolved problems in astronomy is how galaxies form • Birth of Population I and II Stars ⇒ The Milky Way probably began as a vast, slowly rotating gas cloud, perhaps a million light-years in diameter and containing about 1011 solar masses. The cloud was composed of almost pure hydro ...
powerpoint file - QUB Astrophysics Research Centre
... Opacity Concept of opacity introduced when deriving the equation of radiation transport, and discussed extensively in the Level 3 Stellar Atmospheres course. Opacity is the resistance of material to the flow of radiation through it. In most stellar interiors it is determined by all the processes wh ...
... Opacity Concept of opacity introduced when deriving the equation of radiation transport, and discussed extensively in the Level 3 Stellar Atmospheres course. Opacity is the resistance of material to the flow of radiation through it. In most stellar interiors it is determined by all the processes wh ...
Homework 5
... The first four problems are from Shu’s book; they’re embedded in a magnificent chapter on stellar structure as applied to the sun. 1) Shu problem 5.11 2) Shu problem 5.12 3) Shu problem 5.13, with the following extension. In Shu 5.11 you computed how long it takes a photon to leak out of the sun. Th ...
... The first four problems are from Shu’s book; they’re embedded in a magnificent chapter on stellar structure as applied to the sun. 1) Shu problem 5.11 2) Shu problem 5.12 3) Shu problem 5.13, with the following extension. In Shu 5.11 you computed how long it takes a photon to leak out of the sun. Th ...
Sample - Physics @ IUPUI
... Please circle your answers as they will be your only record of the answers you have given on the test. Please then mark the answer in the appropriate bubble on the scan sheet. Be sure to include your name. Use only a #2 pencil. If your pencil breaks, or you do not have one, a pencil will be provided ...
... Please circle your answers as they will be your only record of the answers you have given on the test. Please then mark the answer in the appropriate bubble on the scan sheet. Be sure to include your name. Use only a #2 pencil. If your pencil breaks, or you do not have one, a pencil will be provided ...
Sizes of Stars - The University of Texas at Dallas
... is the source of all of the Sun’s energy. Deep inside our star is its core. Fusion can only happen in the hot dense core of the Sun. A star will stay on the main sequence until there is no more hydrogen in the star’s core that can be converted to helium. ...
... is the source of all of the Sun’s energy. Deep inside our star is its core. Fusion can only happen in the hot dense core of the Sun. A star will stay on the main sequence until there is no more hydrogen in the star’s core that can be converted to helium. ...
Uranometria 2000.0`s Dark Nebulae Database
... Dark nebulae are composed of clouds of dust and gas sufficiently dense as to become opaque. They are detectable if positioned between the observer and a bright nebula or a very dense star field, against which they can be seen silhouetted. Observationally, dark nebulae are among the most difficult de ...
... Dark nebulae are composed of clouds of dust and gas sufficiently dense as to become opaque. They are detectable if positioned between the observer and a bright nebula or a very dense star field, against which they can be seen silhouetted. Observationally, dark nebulae are among the most difficult de ...
bildsten
... Highlights so Far • Acoustic waves seen in nearly all evolved stars with amplitudes of 3-200 parts per million. • Measured frequency spacing and maximum observed frequency give R, M and D for >10,000 stars across the galaxy. Great test for GAIA and new galactic science enabled. • Useful diagnostics ...
... Highlights so Far • Acoustic waves seen in nearly all evolved stars with amplitudes of 3-200 parts per million. • Measured frequency spacing and maximum observed frequency give R, M and D for >10,000 stars across the galaxy. Great test for GAIA and new galactic science enabled. • Useful diagnostics ...
An Archive of Chandra Observations of Regions of Star Formation...
... The archive is designed to aid both the X-ray astronomer with a desire to compare X-ray datasets and the star formation astronomer wishing to compare stars across the spectrum. It brings together Chandra data on open clusters and other bright, variable, young stars for the study of the various physi ...
... The archive is designed to aid both the X-ray astronomer with a desire to compare X-ray datasets and the star formation astronomer wishing to compare stars across the spectrum. It brings together Chandra data on open clusters and other bright, variable, young stars for the study of the various physi ...
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.