20.1 A Solar System is Born
... Upsetting the Balance “As the matter in a globule collapses… inward the temperature… increases and the stage is set for stars to form.” Solar nebula – the cloud of gas and dust that formed our solar system. ...
... Upsetting the Balance “As the matter in a globule collapses… inward the temperature… increases and the stage is set for stars to form.” Solar nebula – the cloud of gas and dust that formed our solar system. ...
NCEA Level 2 Earth and Space Science (91192) 2015
... Star birth explained with associated energy changes: GMC collapsing changes gravitational potential energy into heat energy. When this heat energy temperature reaches about 1 000 000 K, nuclear fusion of hydrogen into helium occurs. All stars spend a period of time on the main sequence where the sta ...
... Star birth explained with associated energy changes: GMC collapsing changes gravitational potential energy into heat energy. When this heat energy temperature reaches about 1 000 000 K, nuclear fusion of hydrogen into helium occurs. All stars spend a period of time on the main sequence where the sta ...
File
... CLASS COPY!!! CLASS COPY!!! CLASS COPY!!! CLASS COPY!!! HR STAR DIAGRAM OBJECTIVE: Compare a stars color, temperature, brightness, and size to its spectral class. PURPOSE: Plot stars according to brightness and temperature to create an HR diagram. PROCEDURES: 1. Study the star data table on the back ...
... CLASS COPY!!! CLASS COPY!!! CLASS COPY!!! CLASS COPY!!! HR STAR DIAGRAM OBJECTIVE: Compare a stars color, temperature, brightness, and size to its spectral class. PURPOSE: Plot stars according to brightness and temperature to create an HR diagram. PROCEDURES: 1. Study the star data table on the back ...
Sample Test 22
... 1. Gamma-Ray bursts (GRBs) were discovered by accident in the late 1960s. In 1991, the Compton Gamma Ray Observatory showed that the GRBs are distributed isotropically. 2. GRBs last from 0.01 second to tens of minutes, and a few GRBs are observed each day. For a short time period, some GRBs become t ...
... 1. Gamma-Ray bursts (GRBs) were discovered by accident in the late 1960s. In 1991, the Compton Gamma Ray Observatory showed that the GRBs are distributed isotropically. 2. GRBs last from 0.01 second to tens of minutes, and a few GRBs are observed each day. For a short time period, some GRBs become t ...
Astro 10: Introductory Astronomy
... nebula while it was hot enough (>1600K) for CAI material to not yet have solidified. • Gritschneder et.al. 2011 hydro simulations show a massive star supernova (type II SN) within a Giant Molecular Cloud, and 5pc away from a reasonble overdensity, would both compress the overdensity cloud to initiat ...
... nebula while it was hot enough (>1600K) for CAI material to not yet have solidified. • Gritschneder et.al. 2011 hydro simulations show a massive star supernova (type II SN) within a Giant Molecular Cloud, and 5pc away from a reasonble overdensity, would both compress the overdensity cloud to initiat ...
STARS
... The greater a stars mass, the greater is the amount of its nuclear fuel. However, the more massive stars are fuel guzzlers. They shine much brighter than less massive stars and use up their fuel very fast. So the more massive stars have shorter lives. Our sun will last about 10 billion years ( we a ...
... The greater a stars mass, the greater is the amount of its nuclear fuel. However, the more massive stars are fuel guzzlers. They shine much brighter than less massive stars and use up their fuel very fast. So the more massive stars have shorter lives. Our sun will last about 10 billion years ( we a ...
File
... Collapse of the Iron Core • Core becomes compressed, stops, and then rebounds with a vengeance. • It takes only 1 second from the start of the collapse to the “bounce” at neutron contact. • An energetic shock wave sweeps through the star at high speed, blasting all overlying layers, including heavy ...
... Collapse of the Iron Core • Core becomes compressed, stops, and then rebounds with a vengeance. • It takes only 1 second from the start of the collapse to the “bounce” at neutron contact. • An energetic shock wave sweeps through the star at high speed, blasting all overlying layers, including heavy ...
Chapter 14. Stellar Structure and Evolution
... luminous that the radiation pressure from their luminosity is sufficient to stop further mass from falling on them. They therefore are self-limiting in terms of the mass to which they can grow. Low mass stars, on the other hand, can be so small in mass that they do not get their central temperatures ...
... luminous that the radiation pressure from their luminosity is sufficient to stop further mass from falling on them. They therefore are self-limiting in terms of the mass to which they can grow. Low mass stars, on the other hand, can be so small in mass that they do not get their central temperatures ...
A time travel of 14 billion years
... Hubble was able to measure the distances to only a handful of other galaxies, but he realised that as a rough guide he could take their apparent brightness as an indication of their distance. The speed with which a galaxy was moving toward or away from us was relatively easy to measure due to the Do ...
... Hubble was able to measure the distances to only a handful of other galaxies, but he realised that as a rough guide he could take their apparent brightness as an indication of their distance. The speed with which a galaxy was moving toward or away from us was relatively easy to measure due to the Do ...
April 15th
... candles because they have identical maximum luminosities • Their collapse and explosion occur the same way each time ...
... candles because they have identical maximum luminosities • Their collapse and explosion occur the same way each time ...
Handout from Allaire Star Party
... One of the best known planetary nebulae is the Ring Nebula in the constellation Lyra. The Ring Nebula is 57 light years from the Earth and is similar to what our Sun will look like when it dies about 5 billion years from now. The Ring Nebula is an excellent target for small telescopes, and it is M57 ...
... One of the best known planetary nebulae is the Ring Nebula in the constellation Lyra. The Ring Nebula is 57 light years from the Earth and is similar to what our Sun will look like when it dies about 5 billion years from now. The Ring Nebula is an excellent target for small telescopes, and it is M57 ...
Nuclear Nomenclature
... Neutron Stars and Black Holes • If matter is forced to even higher densities than in a white dwarf, 106 times that of water, it collapses but could stabilize to form a neutron star with aid of additional pressure from nucleon degeneracy and the strong nuclear force. ...
... Neutron Stars and Black Holes • If matter is forced to even higher densities than in a white dwarf, 106 times that of water, it collapses but could stabilize to form a neutron star with aid of additional pressure from nucleon degeneracy and the strong nuclear force. ...
Neutron Stars and Black Holes
... •! Recent experiments uncovered evidence of a nearby supernova about 3 million years ago. •! Radioactive iron atoms have been found in ancient samples of deepocean material-- debris from this explosion. •! Explosion was close, probably a "nearmiss," which emitted intense and possibly harmful radiati ...
... •! Recent experiments uncovered evidence of a nearby supernova about 3 million years ago. •! Radioactive iron atoms have been found in ancient samples of deepocean material-- debris from this explosion. •! Explosion was close, probably a "nearmiss," which emitted intense and possibly harmful radiati ...
The Milky Way - TCNJ | The College of New Jersey
... • Pop II Stars: Have compositions with much less heavy elements than the Sun: 72%H, 28% He, 0.2% metals is typical • Use the pp-II on the MS if M > 1.5 M • Are almost all older than 8 billion years. • Most are in the halo and galactic bulge; however plenty pass through the thick disk too. • Pop III ...
... • Pop II Stars: Have compositions with much less heavy elements than the Sun: 72%H, 28% He, 0.2% metals is typical • Use the pp-II on the MS if M > 1.5 M • Are almost all older than 8 billion years. • Most are in the halo and galactic bulge; however plenty pass through the thick disk too. • Pop III ...
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.