Astronomy 103
... He supposedly became frustrated with his male assistants and famously declared that his maid could do a ...
... He supposedly became frustrated with his male assistants and famously declared that his maid could do a ...
Our Universe
... “As Earth moves in its orbit around the sun, it changes position with respect to the stars; consequently, over time, people on Earth view the stars from slightly different positions. Astronomers calculate how these tiny variations in position correspond to the distance to a star.” ...
... “As Earth moves in its orbit around the sun, it changes position with respect to the stars; consequently, over time, people on Earth view the stars from slightly different positions. Astronomers calculate how these tiny variations in position correspond to the distance to a star.” ...
Can you write numbers in scientific notation
... How is energy produced in the Sun’s core? How does the Sun’s magnetic field influence each type of solar activity discussed in class (sunspots, plages, prominences, solar flares, coronal mass ejections)? Why is it important for us to be able to predict such events? What causes the Sun to leave the M ...
... How is energy produced in the Sun’s core? How does the Sun’s magnetic field influence each type of solar activity discussed in class (sunspots, plages, prominences, solar flares, coronal mass ejections)? Why is it important for us to be able to predict such events? What causes the Sun to leave the M ...
Today`s Objectives - RanelaghALevelPhysics
... • If the Sun has a radius of 6.96 x 108 m and a surface temperature of about 6000 K, what is its total power output? • What is the power per unit area? • What is the peak wavelength? ...
... • If the Sun has a radius of 6.96 x 108 m and a surface temperature of about 6000 K, what is its total power output? • What is the power per unit area? • What is the peak wavelength? ...
Characterizing Stars - Department of Physics and Astronomy
... 5. What are the stars made of? 6. As stars go, is our Sun especially large or small? 7. What are giant, supergiant, and white dwarf stars? 8. How do we know the distances to remote stars? 9. Why are binary star systems important in astronomy? 10.How can a star’s spectrum show whether it is actually ...
... 5. What are the stars made of? 6. As stars go, is our Sun especially large or small? 7. What are giant, supergiant, and white dwarf stars? 8. How do we know the distances to remote stars? 9. Why are binary star systems important in astronomy? 10.How can a star’s spectrum show whether it is actually ...
HR Diagram
... lower end than the higher end of the main sequence on the absolute magnitude axis (which directly corresponds to luminosity). The luminosity of a star is determined by the core’s nuclear fusion process. A certain amount of energy is generated by the star’s fusion reactions, and that amount depends o ...
... lower end than the higher end of the main sequence on the absolute magnitude axis (which directly corresponds to luminosity). The luminosity of a star is determined by the core’s nuclear fusion process. A certain amount of energy is generated by the star’s fusion reactions, and that amount depends o ...
galaxy_physics
... Disks are rotationally supported (dynamically cold) Bulges are dispersion supported (dynamically hot) Two extremes along a continuum Rotation asymmetric drift dispersion ...
... Disks are rotationally supported (dynamically cold) Bulges are dispersion supported (dynamically hot) Two extremes along a continuum Rotation asymmetric drift dispersion ...
Constellations 1
... On a star chart, lines often connect the stars that might make up a constellation. Different star charts must be used at different times of the year and in different places on Earth. Many stars visible from the Southern hemisphere cannot be seen from the Northern hemisphere. ...
... On a star chart, lines often connect the stars that might make up a constellation. Different star charts must be used at different times of the year and in different places on Earth. Many stars visible from the Southern hemisphere cannot be seen from the Northern hemisphere. ...
Constellations 1
... On a star chart, lines often connect the stars that might make up a constellation. Different star charts must be used at different times of the year and in different places on Earth. Many stars visible from the Southern hemisphere cannot be seen from the Northern hemisphere. ...
... On a star chart, lines often connect the stars that might make up a constellation. Different star charts must be used at different times of the year and in different places on Earth. Many stars visible from the Southern hemisphere cannot be seen from the Northern hemisphere. ...
![constellations[1]](http://s1.studyres.com/store/data/008081352_2-f872c73597ccdde4cfed49c9b322d3b2-300x300.png)
constellations[1]
... On a star chart, lines often connect the stars that might make up a constellation. Different star charts must be used at different times of the year and in different places on Earth. Many stars visible from the Southern hemisphere cannot be seen from the Northern hemisphere. ...
... On a star chart, lines often connect the stars that might make up a constellation. Different star charts must be used at different times of the year and in different places on Earth. Many stars visible from the Southern hemisphere cannot be seen from the Northern hemisphere. ...
17. The Universe
... 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 temperature rose and the globule became more compressed, causing it to start spinning. The force of the spinning shaped the ...
... 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 temperature rose and the globule became more compressed, causing it to start spinning. The force of the spinning shaped the ...
I. Stars - SharpSchool
... “As space expands there are many more gaps forming and they need to be filled by stars and energy. So stars need to have a dynamic life cycle. Moments of birth and death, right? ” http://library.thinkquest.org/C0110277/stars/life_cycle1.htm ...
... “As space expands there are many more gaps forming and they need to be filled by stars and energy. So stars need to have a dynamic life cycle. Moments of birth and death, right? ” http://library.thinkquest.org/C0110277/stars/life_cycle1.htm ...
universe new
... 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 temperature rose and the globule became more compressed, causing it to start spinning. The force of the spinning shaped the ...
... 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 temperature rose and the globule became more compressed, causing it to start spinning. The force of the spinning shaped the ...
Name - MIT
... A) surface temperature (or spectral type) on its horizontal axis and apparent brightness on its vertical axis B) age on its horizontal axis and diameter on its vertical axis C) surface temperature (or spectral type) on its horizontal axis and stellar luminosity on its vertical axis D) diameter on it ...
... A) surface temperature (or spectral type) on its horizontal axis and apparent brightness on its vertical axis B) age on its horizontal axis and diameter on its vertical axis C) surface temperature (or spectral type) on its horizontal axis and stellar luminosity on its vertical axis D) diameter on it ...
1 - Università degli Studi dell`Insubria
... >H in the hard stage is proportional to a -/2 >K is typically positive, but the eccentricity evoution of the binary is modest >MBHB-star interactions flatten the stellar distribution >Interacting stars typically corotate with the MBHB >A mass of the order of 0.7M is ejected from the bulge on nearly ...
... >H in the hard stage is proportional to a -/2 >K is typically positive, but the eccentricity evoution of the binary is modest >MBHB-star interactions flatten the stellar distribution >Interacting stars typically corotate with the MBHB >A mass of the order of 0.7M is ejected from the bulge on nearly ...
Ch. 17 (RGs & WDs)
... will destroy the integrity of the work and is not permitted. The work and materials from it should never be made available to students except by instructors using the accompanying text in their classes. All recipients of this work are expected to abide by these restrictions and to honor the intended ...
... will destroy the integrity of the work and is not permitted. The work and materials from it should never be made available to students except by instructors using the accompanying text in their classes. All recipients of this work are expected to abide by these restrictions and to honor the intended ...
ASTR 1050: Survey of Astronomy
... a. operates at a slightly lower temperature than the proton-proton chain. b. is most efficient in stars less massive than the sun. c. occurs when carbon and oxygen combine to form nitrogen, which produces energy. d. produces the energy responsible for bipolar outflows (e.g., in Herbig-Haro objects). ...
... a. operates at a slightly lower temperature than the proton-proton chain. b. is most efficient in stars less massive than the sun. c. occurs when carbon and oxygen combine to form nitrogen, which produces energy. d. produces the energy responsible for bipolar outflows (e.g., in Herbig-Haro objects). ...
Lecture 9: Stellar Spectra
... Example: the Effects of Dust There is gas and dust in between the stars. Dust particles are very small and scatter blue light more efficiently than red light. Most stars appear to be REDDER than they really are. A star’s color no longer tells you its tempertuare. But the spectrum still does! ...
... Example: the Effects of Dust There is gas and dust in between the stars. Dust particles are very small and scatter blue light more efficiently than red light. Most stars appear to be REDDER than they really are. A star’s color no longer tells you its tempertuare. But the spectrum still does! ...
Stellar evolution
Stellar evolution is the process by which a star changes during its lifetime. Depending on the mass of the star, this lifetime ranges from a few million years for the most massive to trillions of years for the least massive, which is considerably longer than the age of the universe. The table shows the lifetimes of stars as a function of their masses. All stars are born from collapsing clouds of gas and dust, often called nebulae or molecular clouds. Over the course of millions of years, these protostars settle down into a state of equilibrium, becoming what is known as a main-sequence star.Nuclear fusion powers a star for most of its life. Initially the energy is generated by the fusion of hydrogen atoms at the core of the main-sequence star. Later, as the preponderance of atoms at the core becomes helium, stars like the Sun begin to fuse hydrogen along a spherical shell surrounding the core. This process causes the star to gradually grow in size, passing through the subgiant stage until it reaches the red giant phase. Stars with at least half the mass of the Sun can also begin to generate energy through the fusion of helium at their core, whereas more-massive stars can fuse heavier elements along a series of concentric shells. Once a star like the Sun has exhausted its nuclear fuel, its core collapses into a dense white dwarf and the outer layers are expelled as a planetary nebula. Stars with around ten or more times the mass of the Sun can explode in a supernova as their inert iron cores collapse into an extremely dense neutron star or black hole. Although the universe is not old enough for any of the smallest red dwarfs to have reached the end of their lives, stellar models suggest they will slowly become brighter and hotter before running out of hydrogen fuel and becoming low-mass white dwarfs.Stellar evolution is not studied by observing the life of a single star, as most stellar changes occur too slowly to be detected, even over many centuries. Instead, astrophysicists come to understand how stars evolve by observing numerous stars at various points in their lifetime, and by simulating stellar structure using computer models.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.