The Interstellar Medium Molecular clouds Stellar halo Bulge (= bar)
... • Photons from very luminous O stars heat and blow away surrounding gas. • So slightly older clusters no longer shrouded by dusty gas • Compression of gas further inside cloud causes inward wave of star formation (“triggered” star formation). ...
... • Photons from very luminous O stars heat and blow away surrounding gas. • So slightly older clusters no longer shrouded by dusty gas • Compression of gas further inside cloud causes inward wave of star formation (“triggered” star formation). ...
Slide 1
... Depending on the mass of the star, its lifetime may be a few million years to trillions of years. Lower massed stars can generate energy for billions of years. ...
... Depending on the mass of the star, its lifetime may be a few million years to trillions of years. Lower massed stars can generate energy for billions of years. ...
Slide 1
... nebula. • Once the nebula stops, only the core of the red giant remains. • Stars will usually end their lives in this state. ...
... nebula. • Once the nebula stops, only the core of the red giant remains. • Stars will usually end their lives in this state. ...
Use this form to take notes in class about stars
... Stars of Spectral Classes B to M 9. What color is our sun? ___________what class is it in? ...
... Stars of Spectral Classes B to M 9. What color is our sun? ___________what class is it in? ...
Polarimetry & Star
... Gravitational collapse of some of these “structures” produces the first stars and galaxies. ...
... Gravitational collapse of some of these “structures” produces the first stars and galaxies. ...
tire
... 15. The grouping of stars on a H-R diagram extending diagonally across the graph. Stars will spend most of their lives on this diagonal. 16. A subatomic particle with no electric charge that is produced in the core of the Sun and trillions pass through us undetected each second. 17. The nearly explo ...
... 15. The grouping of stars on a H-R diagram extending diagonally across the graph. Stars will spend most of their lives on this diagonal. 16. A subatomic particle with no electric charge that is produced in the core of the Sun and trillions pass through us undetected each second. 17. The nearly explo ...
t2 images part 1
... Big Bang hot enough to make Hydrogen and Helium, two elements that make up 98% of the Universes’ present composition, as well as trace amounts of Lithium and Beryllium ...
... Big Bang hot enough to make Hydrogen and Helium, two elements that make up 98% of the Universes’ present composition, as well as trace amounts of Lithium and Beryllium ...
Powerpoint Presentation (large file)
... Interstellar gas and dust pervade the Galaxy • Interstellar gas and dust, which make up the interstellar medium, are concentrated in the disk of the Galaxy • Clouds within the interstellar medium are called nebulae • Dark nebulae are so dense that they are opaque • They appear as dark blots agains ...
... Interstellar gas and dust pervade the Galaxy • Interstellar gas and dust, which make up the interstellar medium, are concentrated in the disk of the Galaxy • Clouds within the interstellar medium are called nebulae • Dark nebulae are so dense that they are opaque • They appear as dark blots agains ...
Ch.15 star formation
... • Observations of star clusters show that star formation makes many more low-mass stars than high-mass stars ...
... • Observations of star clusters show that star formation makes many more low-mass stars than high-mass stars ...
Life Cycles of Stars
... megatons/second • Let’s relate that to human scales. What would that be at one kilometer distance? • 77 x 1015 tons/(150 x 106km)2 = 3 tons • Picture a truckload of explosives a km away giving off a one-second burst of heat and light to rival the Sun ...
... megatons/second • Let’s relate that to human scales. What would that be at one kilometer distance? • 77 x 1015 tons/(150 x 106km)2 = 3 tons • Picture a truckload of explosives a km away giving off a one-second burst of heat and light to rival the Sun ...
powerpoint version
... Sometimes see red shifted absorption lines due to material falling inwards to make a growing star. ...
... Sometimes see red shifted absorption lines due to material falling inwards to make a growing star. ...
Homework 4
... 1. If a protostar is forming out of a cold molecular cloud, how can its luminosity be upto one hundred times as large as the luminosity of the star it will become? ...
... 1. If a protostar is forming out of a cold molecular cloud, how can its luminosity be upto one hundred times as large as the luminosity of the star it will become? ...
Introduction to Astrophysics, Lecture 10
... As the cloud begins to collapse, the density increases, which means that the minimum collapse mass decreases. We therefore expect that the initial cloud to collapse is about one thousand solar masses or more, and as it collapses it is able to fragment into smaller masses, so that the original clou ...
... As the cloud begins to collapse, the density increases, which means that the minimum collapse mass decreases. We therefore expect that the initial cloud to collapse is about one thousand solar masses or more, and as it collapses it is able to fragment into smaller masses, so that the original clou ...
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.