Stellar Evolution Notes
... A galaxy is a group of hundreds of billions of stars that are relatively close to each other. Our galaxy, the Milky Way, contains over 100 billion stars. The universe has more than 100 billion galaxies with each galaxy containing an average of 100 billion stars. ...
... A galaxy is a group of hundreds of billions of stars that are relatively close to each other. Our galaxy, the Milky Way, contains over 100 billion stars. The universe has more than 100 billion galaxies with each galaxy containing an average of 100 billion stars. ...
Stellar Evolution Notes
... A galaxy is a group of hundreds of billions of stars that are relatively close to each other. Our galaxy, the Milky Way, contains over 100 billion stars. The universe has more than 100 billion galaxies with each galaxy containing an average of 100 billion stars. ...
... A galaxy is a group of hundreds of billions of stars that are relatively close to each other. Our galaxy, the Milky Way, contains over 100 billion stars. The universe has more than 100 billion galaxies with each galaxy containing an average of 100 billion stars. ...
The accretion disk paradigm for young stars
... Balmer lines of these objects, indicating infall velocity of up to 400 km/s. In these spectra the Balmer jump is clearly in emission, and the overall line spectra look very much like those of usual TTSs. Walker (1963) suggested that “the presence of the excess continuous emission may have some conne ...
... Balmer lines of these objects, indicating infall velocity of up to 400 km/s. In these spectra the Balmer jump is clearly in emission, and the overall line spectra look very much like those of usual TTSs. Walker (1963) suggested that “the presence of the excess continuous emission may have some conne ...
Summary of the Presentation
... (assuming a constant production rate) eliminating 2/3 as being too young, the value of R was estimated to be ~85,000 suitable stars per billion cubic light years. Of the stars examined for planets, planets have been found around only ~12%. As the ability to detect small planets improves, a larger pe ...
... (assuming a constant production rate) eliminating 2/3 as being too young, the value of R was estimated to be ~85,000 suitable stars per billion cubic light years. Of the stars examined for planets, planets have been found around only ~12%. As the ability to detect small planets improves, a larger pe ...
Lecture 14 - Center for Astrophysics and Space Astronomy CASA
... We now see a dozen or so every year in distant galaxies. ...
... We now see a dozen or so every year in distant galaxies. ...
Helium Fusion What Will Happen When There Is No More Helium in
... stages of life in a low-mass star? A. protostar, main-sequence star, red giant, planetary nebula, white dwarf B. protostar, main-sequence star, red giant, supernova, neutron star C. main-sequence star, white dwarf, red giant, planetary nebula, protostar D. protostar, main-sequence star, planetar ...
... stages of life in a low-mass star? A. protostar, main-sequence star, red giant, planetary nebula, white dwarf B. protostar, main-sequence star, red giant, supernova, neutron star C. main-sequence star, white dwarf, red giant, planetary nebula, protostar D. protostar, main-sequence star, planetar ...
Stellar Evolution 1 Star Formation 2 Nebulae
... The lifetimes of stars are typically in the billions of years, although the more massive the star, the shorter the lifetime. The “birth” and “death” of a star take a relatively short time compared to the long middle part of the “life” of a star. In the long middle part, in which the star is relative ...
... The lifetimes of stars are typically in the billions of years, although the more massive the star, the shorter the lifetime. The “birth” and “death” of a star take a relatively short time compared to the long middle part of the “life” of a star. In the long middle part, in which the star is relative ...
Chapter 13 Other Planetary Systems Why is it so difficult to detect
... massive planets can eject one planet while flinging the other into a highly elliptical orbit • Multiple close encounters with smaller planetesimals can also cause inward migration ...
... massive planets can eject one planet while flinging the other into a highly elliptical orbit • Multiple close encounters with smaller planetesimals can also cause inward migration ...
Chapter 15 The Formation of Planetary Systems
... closer to star. Why didn’t our Jupiter migrate? Nearly all of these have been discovered using the radial velocity method. This method (and most other methods) miss planets far from their stars, so can’t tell how common systems like ours are. The detection of Earth-like planets is the “holy grail” o ...
... closer to star. Why didn’t our Jupiter migrate? Nearly all of these have been discovered using the radial velocity method. This method (and most other methods) miss planets far from their stars, so can’t tell how common systems like ours are. The detection of Earth-like planets is the “holy grail” o ...
Chapter 15 The Formation of Planetary Systems
... closer to star. Why didn’t our Jupiter migrate? Nearly all of these have been discovered using the radial velocity method. This method (and most other methods) miss planets far from their stars, so can’t tell how common systems like ours are. The detection of Earth-like planets is the “holy grail” o ...
... closer to star. Why didn’t our Jupiter migrate? Nearly all of these have been discovered using the radial velocity method. This method (and most other methods) miss planets far from their stars, so can’t tell how common systems like ours are. The detection of Earth-like planets is the “holy grail” o ...
PISGAH Text by Dr. Bob Hayward ASTRONOMICAL Astronomer
... The planets: Four of the five classical or naked-eye planets are in the predawn skies as they have been since early December. But Mercury is now in the evening skies just for this week. Look for it low in the southwest as the sun sets. On January 14 this elusive planet passes through inferior conjun ...
... The planets: Four of the five classical or naked-eye planets are in the predawn skies as they have been since early December. But Mercury is now in the evening skies just for this week. Look for it low in the southwest as the sun sets. On January 14 this elusive planet passes through inferior conjun ...
Chapter 15
... A number of Earthlike planets have now been observed, although due to detection difficulties most exoplanets still fall into the “hot Jupiter” category, making other planetary systems look quite different from our own. Until we are able to observe much smaller planets at much ...
... A number of Earthlike planets have now been observed, although due to detection difficulties most exoplanets still fall into the “hot Jupiter” category, making other planetary systems look quite different from our own. Until we are able to observe much smaller planets at much ...
Vampy Astronomy Syllabus
... related to both observational astronomy and physical astronomy. While some of you may have some astronomyrelated experience, the assumption is that each student is a tabula rasa when it comes to understanding the field. So, we will start at the ground level and work our way up. However, you should n ...
... related to both observational astronomy and physical astronomy. While some of you may have some astronomyrelated experience, the assumption is that each student is a tabula rasa when it comes to understanding the field. So, we will start at the ground level and work our way up. However, you should n ...
Lecture 7 Stars and Galaxies and Nebula, (Oh My!) Feb 18 2003
... Outer layers of gas are blown off from the core of a star. The core often goes on to become a white dwarf. The eject gas is illuminated by the remaining star. This is the fate of most stars, including our own Sun. ...
... Outer layers of gas are blown off from the core of a star. The core often goes on to become a white dwarf. The eject gas is illuminated by the remaining star. This is the fate of most stars, including our own Sun. ...
ASTR 330: The Solar System
... Fact 9: Volatile compounds (such as water) have reached the inner planets even though the bulk composition of these objects suggests formation at temperatures too high for these volatiles to form solid grains. • This point hints at the problem of mixing, of material between the outer and inner solar ...
... Fact 9: Volatile compounds (such as water) have reached the inner planets even though the bulk composition of these objects suggests formation at temperatures too high for these volatiles to form solid grains. • This point hints at the problem of mixing, of material between the outer and inner solar ...
Effects of hot halo gas during distant galaxy-galaxy encounters
... • Four snapshots taken at t = 4, 5, 6, & 7 Gyr, projected onto the x-y plane ( -350 < x,y < 350, all z) • Top panels: dist. of the collisionless particles, bottom panels: dist. of the gas particles • ◊=CM of LTG, ○=CM of ETG, Color shows the origin of the particles, Green=‘young’ stars, Orange=‘old’ ...
... • Four snapshots taken at t = 4, 5, 6, & 7 Gyr, projected onto the x-y plane ( -350 < x,y < 350, all z) • Top panels: dist. of the collisionless particles, bottom panels: dist. of the gas particles • ◊=CM of LTG, ○=CM of ETG, Color shows the origin of the particles, Green=‘young’ stars, Orange=‘old’ ...
