Astro 10: Introductory Astronomy
... of the Universe. Exams will stress getting a picture of processes and the ‘why’ behind what we see, not so much on memorized factoids. ...
... of the Universe. Exams will stress getting a picture of processes and the ‘why’ behind what we see, not so much on memorized factoids. ...
Ch. 14 Formation of Stars
... energy so that it neither expands or contracts too much? • If the star begins producing more energy, then it expands. This results in a lower central temperature and density and slows nuclear fusion until the star regained stability. • The same process works in reverse: if less energy were generated ...
... energy so that it neither expands or contracts too much? • If the star begins producing more energy, then it expands. This results in a lower central temperature and density and slows nuclear fusion until the star regained stability. • The same process works in reverse: if less energy were generated ...
CBradleyLoutl
... . .3 - 1.2 Solar Masses: It will expand into a red giant, then fall back down into a white dwarf. If the star’s mass is high enough (>1.2 Solar Masses), the fusion process repeats with the newly formed heavier elements. . 1.2 - 2.4 Solar Masses: It supernovas. The outside explodes, the inside collap ...
... . .3 - 1.2 Solar Masses: It will expand into a red giant, then fall back down into a white dwarf. If the star’s mass is high enough (>1.2 Solar Masses), the fusion process repeats with the newly formed heavier elements. . 1.2 - 2.4 Solar Masses: It supernovas. The outside explodes, the inside collap ...
PHYS 175 Fall 2014 Final Recitation Ch. 16 The Sun
... Photons released in the core (where fusion takes place) collide almost instantaneously with other core constituents. This energy gradually flows outward, until the density of the sun decreases sufficiently to allow for radiative diffusion of the energy. Again, the photons still undergo many collisio ...
... Photons released in the core (where fusion takes place) collide almost instantaneously with other core constituents. This energy gradually flows outward, until the density of the sun decreases sufficiently to allow for radiative diffusion of the energy. Again, the photons still undergo many collisio ...
Stellar Evolution
... it creates a stronger gravitational field and heats up. Making “protostars” ...
... it creates a stronger gravitational field and heats up. Making “protostars” ...
Homework 7
... Due Friday, November 22, 2013 at 5 p.m., either electronically or on paper. 1. How does solar nebula theory explain the dramatic density difference between the terrestrial and Jovian planets? ...
... Due Friday, November 22, 2013 at 5 p.m., either electronically or on paper. 1. How does solar nebula theory explain the dramatic density difference between the terrestrial and Jovian planets? ...
presentation source
... What Happened around 1950? HR Diagram comes into focus • Globular cluster stars clearly very old (>few Gyr) • T Tauri and other “pre-main-sequence”stars clearly very young (few Myr) • Real admitted need for star formation ...
... What Happened around 1950? HR Diagram comes into focus • Globular cluster stars clearly very old (>few Gyr) • T Tauri and other “pre-main-sequence”stars clearly very young (few Myr) • Real admitted need for star formation ...
The Sizes of Stars
... Much of this matter is far, far from any star. It is therefore very cold. In these cold regions, atoms can stick together to form molecules, such as H2. A Giant Molecular Cloud may contain over 100,000,000 M of material! ...
... Much of this matter is far, far from any star. It is therefore very cold. In these cold regions, atoms can stick together to form molecules, such as H2. A Giant Molecular Cloud may contain over 100,000,000 M of material! ...
Outline2a
... Star Formation in the HR Diagram As the gas cloud collapses, the protostar gets smaller and smaller (and, due to the increased central pressure), hotter and hotter. Accretion will cause the mass of the protostar to increase more than 100 times. The star will move towards its place on the main seque ...
... Star Formation in the HR Diagram As the gas cloud collapses, the protostar gets smaller and smaller (and, due to the increased central pressure), hotter and hotter. Accretion will cause the mass of the protostar to increase more than 100 times. The star will move towards its place on the main seque ...
Today`s Powerpoint
... gas. Some collapse under their own gravity. Others may be more stable. Magnetic fields and rotation also have some influence. Gravity makes cloud want to collapse. ...
... gas. Some collapse under their own gravity. Others may be more stable. Magnetic fields and rotation also have some influence. Gravity makes cloud want to collapse. ...
PowerPoint Presentation - ASTR498E High energy
... The mass of the star M The fraction of the stellar mass that can participate in the fusion reactions f ...
... The mass of the star M The fraction of the stellar mass that can participate in the fusion reactions f ...
Life Cycle of Stars: Chapter 21
... • Expands and collapses to facilitate helium burning – Becomes helium burning star ...
... • Expands and collapses to facilitate helium burning – Becomes helium burning star ...
No Slide Title
... The neutron star may continue to gain mass from nearby stars. At a critical moment, it becomes so dense it collapses in on itself, becoming a single point of zero size! Its gravity is so strong that even light cannot escape from inside a certain boundary - the EVENT HORIZON. The star is now a BLACK ...
... The neutron star may continue to gain mass from nearby stars. At a critical moment, it becomes so dense it collapses in on itself, becoming a single point of zero size! Its gravity is so strong that even light cannot escape from inside a certain boundary - the EVENT HORIZON. The star is now a BLACK ...
Document
... a. The latter has a diameter of almost two billion miles. b. If you counted one star a second it would take you more than thirty thousand years to count 100 billion. c. But, during your lifetime, as always, new stars are being crated. d. The solar system is located in the Milky Way Galaxy. e. Stars ...
... a. The latter has a diameter of almost two billion miles. b. If you counted one star a second it would take you more than thirty thousand years to count 100 billion. c. But, during your lifetime, as always, new stars are being crated. d. The solar system is located in the Milky Way Galaxy. e. Stars ...
The Hidden Lives of Galaxies NSTA 2001
... At 15 million degrees Celsius in the center of the star, fusion ignites ! ...
... At 15 million degrees Celsius in the center of the star, fusion ignites ! ...
Clues to the Origin of the Solar System
... ! Sun, Jupiter, and Saturn have same hydrogen dominated composition implying they formed from the same materials. ! Terrestrial planets and satellites are deficient in light gases and ices. Formed too close to Sun for gases/ices to remain, leaving heavier rock and metal. ...
... ! Sun, Jupiter, and Saturn have same hydrogen dominated composition implying they formed from the same materials. ! Terrestrial planets and satellites are deficient in light gases and ices. Formed too close to Sun for gases/ices to remain, leaving heavier rock and metal. ...
Stellar_Evol
... • Not all stars fuse H into He • Helium can be fused to Carbon, Carbon to nitrogen and more… • All to produce enough energy to fight ...
... • Not all stars fuse H into He • Helium can be fused to Carbon, Carbon to nitrogen and more… • All to produce enough energy to fight ...
giant molecular clouds
... Triggering Star Formation (1) Previous star formation can trigger further star formation through: a) Shocks from ...
... Triggering Star Formation (1) Previous star formation can trigger further star formation through: a) Shocks from ...
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.