Stellar Evolution
... and diameter. In fact, astronomers have discovered that the mass and the composition (makeup) of a star determine nearly all its other properties. ...
... and diameter. In fact, astronomers have discovered that the mass and the composition (makeup) of a star determine nearly all its other properties. ...
Star formation, feedback and the role of SNe II and SNe Ia in the
... dwarf found that Fornax has a more massive dark matter halo than found by previous studies (M/LV=10-40 in the sampled region) and proposed models with M=108-109 MO ...
... dwarf found that Fornax has a more massive dark matter halo than found by previous studies (M/LV=10-40 in the sampled region) and proposed models with M=108-109 MO ...
Project 4: The HR diagram. Open clusters
... they must be very small, so they're called white dwarfs. ...
... they must be very small, so they're called white dwarfs. ...
Essay - CLC Charter School
... are crushed together, temperatures reach billions of degrees Celsius, and then a series of nuclear reactions is unleashed. The supernova produces a giant shock wave that throws matter into space at 9,000 to 25,000 miles per second. Type Ia, Ib and Ic Supernovae There are several classes of supernova ...
... are crushed together, temperatures reach billions of degrees Celsius, and then a series of nuclear reactions is unleashed. The supernova produces a giant shock wave that throws matter into space at 9,000 to 25,000 miles per second. Type Ia, Ib and Ic Supernovae There are several classes of supernova ...
Chapter 1 Our Place in the Universe
... • with Earth’s axis tilted by 23.5º (pointing to Polaris). • and rotates in the same direction it orbits, counterclockwise as viewed from above the North Pole. ...
... • with Earth’s axis tilted by 23.5º (pointing to Polaris). • and rotates in the same direction it orbits, counterclockwise as viewed from above the North Pole. ...
Thursday October 1 - Montana State University
... It’s hard to read your protractor when it is dark outside. The parallax angle is very small because the stars are so far away. We can’t see any of the same stars ...
... It’s hard to read your protractor when it is dark outside. The parallax angle is very small because the stars are so far away. We can’t see any of the same stars ...
Star Formation
... Thought Question What would happen to a contracting cloud fragment if it were not able to radiate away its thermal energy? A. It would continue contracting, but its temperature would not change B. Its mass would increase C. Its internal pressure would increase ...
... Thought Question What would happen to a contracting cloud fragment if it were not able to radiate away its thermal energy? A. It would continue contracting, but its temperature would not change B. Its mass would increase C. Its internal pressure would increase ...
Stellar Lives (continued). Galaxies.
... pressure, the core continues to collapse into a black hole. ...
... pressure, the core continues to collapse into a black hole. ...
Prep/Review Questions - Faculty Web Sites at the University
... Why does even a small telescope reveal many more stars than are visible to the naked eye? You have three eyepieces with focal lengths of 200, 100, and 20 mm to use with your telescope, which has a focal length of 1800 mm. Which eyepiece will give you an image with 90 power magnification? Which eyepi ...
... Why does even a small telescope reveal many more stars than are visible to the naked eye? You have three eyepieces with focal lengths of 200, 100, and 20 mm to use with your telescope, which has a focal length of 1800 mm. Which eyepiece will give you an image with 90 power magnification? Which eyepi ...
Summary of the Presentation
... planet. Because stars slowly increase their luminosity during their main sequence phase, they actually are suitable hosts only during about 75% of their main sequence life. Hence F6, and larger, stars are too short-lived. Stars that are too small, however, have CHZs (circumstellar habitable zones) s ...
... planet. Because stars slowly increase their luminosity during their main sequence phase, they actually are suitable hosts only during about 75% of their main sequence life. Hence F6, and larger, stars are too short-lived. Stars that are too small, however, have CHZs (circumstellar habitable zones) s ...
The Sun and other Stars
... the same time, but independently of each other. H-R Diagram – ____________________________ Most stars lie along a diagonal line called the ______ ...
... the same time, but independently of each other. H-R Diagram – ____________________________ Most stars lie along a diagonal line called the ______ ...
Deducing Temperatures and Luminosities of Stars
... “Tools”, not “Problems” • If we can determine that 2 stars are identical, then their relative brightness translates to relative distances • Example: Sun vs. α Cen – spectra are very similar ⇒ temperatures, radii almost identical (T follows from Planck function, radius R can be deduced by other means ...
... “Tools”, not “Problems” • If we can determine that 2 stars are identical, then their relative brightness translates to relative distances • Example: Sun vs. α Cen – spectra are very similar ⇒ temperatures, radii almost identical (T follows from Planck function, radius R can be deduced by other means ...
Lecture 3
... • The parallax effect is the apparent motion of a nearby object compared to distant background objects because of a change in viewing angle. • Put a finger in front of your nose and watch it move with respect to the back of the room as you look through one eye and then the other. ...
... • The parallax effect is the apparent motion of a nearby object compared to distant background objects because of a change in viewing angle. • Put a finger in front of your nose and watch it move with respect to the back of the room as you look through one eye and then the other. ...
Right Ascension
... When the fuel runs out, the balance between gravity pulling material in and gas pressure pushing it out breaks down. The core begins to contract because energy is no longer being produced. As the core contracts, it gets hotter and hotter, as the pressure increases. What happens next depends on the m ...
... When the fuel runs out, the balance between gravity pulling material in and gas pressure pushing it out breaks down. The core begins to contract because energy is no longer being produced. As the core contracts, it gets hotter and hotter, as the pressure increases. What happens next depends on the m ...
Astronomy Unit 4 Galaxies
... 37. The distribution of galaxies in the universe is not ___________________, but clusters of galaxies lie within structures called ___________________ which surround empty regions called __________________. 38. Galaxies that are brighter than normal are called __________________________ and emit mos ...
... 37. The distribution of galaxies in the universe is not ___________________, but clusters of galaxies lie within structures called ___________________ which surround empty regions called __________________. 38. Galaxies that are brighter than normal are called __________________________ and emit mos ...
88K PDF file
... (a) What does this tell you about the relative temperatures of the two stars. (b) What does it tell you about their respective sizes? (a) The bluer star is hotter. (You don’t need to say anything about distance, relative size, luminosity, brightness, or anything else. If something is radiating therm ...
... (a) What does this tell you about the relative temperatures of the two stars. (b) What does it tell you about their respective sizes? (a) The bluer star is hotter. (You don’t need to say anything about distance, relative size, luminosity, brightness, or anything else. If something is radiating therm ...
1. Neutron stars 2. Black holes
... neutron star material would weigh 100 million tons. Gravity extremely powerful; you’d weigh a lot more on this star! Carry strong magnetic fields. Spin very fast! (a consequence of the conservation of angular momentum) ...
... neutron star material would weigh 100 million tons. Gravity extremely powerful; you’d weigh a lot more on this star! Carry strong magnetic fields. Spin very fast! (a consequence of the conservation of angular momentum) ...
Stellar kinematics
Stellar kinematics is the study of the movement of stars without needing to understand how they acquired their motion. This differs from stellar dynamics, which takes into account gravitational effects. The motion of a star relative to the Sun can provide useful information about the origin and age of a star, as well as the structure and evolution of the surrounding part of the Milky Way.In astronomy, it is widely accepted that most stars are born within molecular clouds known as stellar nurseries. The stars formed within such a cloud compose open clusters containing dozens to thousands of members. These clusters dissociate over time. Stars that separate themselves from the cluster's core are designated as members of the cluster's stellar association. If the remnant later drifts through the Milky Way as a coherent assemblage, then it is termed a moving group.