Compa ring between Spectroscopic and Photometric Method for
... Slawson, R.W., Prša, A., Welsh, W.F., et al., 2011, The Astronomical Journal 142(5): 160. ...
... Slawson, R.W., Prša, A., Welsh, W.F., et al., 2011, The Astronomical Journal 142(5): 160. ...
astrocoursespring2012lec5-1-1
... Just as we use Cepheid Variables to gauge distances in and around our galaxy, we use Supernova Type 1a beacons found in other galaxies to obtain absolute Magnitude Measurements. Extra-galactic Standard candle - a particular type of exploding star known as a type Ia Supernova. These objects are thoug ...
... Just as we use Cepheid Variables to gauge distances in and around our galaxy, we use Supernova Type 1a beacons found in other galaxies to obtain absolute Magnitude Measurements. Extra-galactic Standard candle - a particular type of exploding star known as a type Ia Supernova. These objects are thoug ...
lecture_5_mbu
... Energy release can be calculated from E=mc2 – e.g. in H fusion 4 x 11H atoms 1 x 42He atom Mass of 4 x 11H atoms = 4 x 1.6729x10-27kg = 6.6916x10-27kg Mass of 1 x 42He atom = 1 x 6.6443x10-27kg E = (4 x 11H atoms1 - 42He atom)c2 = (6.6916x10-27kg - 6.6443x1027kg)c2 = 4.26x10-12J ...
... Energy release can be calculated from E=mc2 – e.g. in H fusion 4 x 11H atoms 1 x 42He atom Mass of 4 x 11H atoms = 4 x 1.6729x10-27kg = 6.6916x10-27kg Mass of 1 x 42He atom = 1 x 6.6443x10-27kg E = (4 x 11H atoms1 - 42He atom)c2 = (6.6916x10-27kg - 6.6443x1027kg)c2 = 4.26x10-12J ...
Tyler Gray - Angelfire
... companions, M33, and others. Visible to the naked eye even under moderate conditions, this object was known as the "little cloud" to the Persian astronomer Abd-al-Rahman Al-Sufi, who described and depicted it in 964 AD in his Book of Fixed Stars: It must have been observed by and commonly known to P ...
... companions, M33, and others. Visible to the naked eye even under moderate conditions, this object was known as the "little cloud" to the Persian astronomer Abd-al-Rahman Al-Sufi, who described and depicted it in 964 AD in his Book of Fixed Stars: It must have been observed by and commonly known to P ...
Handout 15: Virial Theorem E = P.E. + K.E = (1/2)P.E. = -K.E.
... drag causes r to decrease P.E. decreases |P.E.| increases K.E. increases Satellite speeds up! Gas drag causes speed to increase Half the decrease in P.E. goes into heating up the atmosphere ...
... drag causes r to decrease P.E. decreases |P.E.| increases K.E. increases Satellite speeds up! Gas drag causes speed to increase Half the decrease in P.E. goes into heating up the atmosphere ...
Stellar Census
... telescope, but the presence of the companion star is revealed by spectroscopy Such stars are called spectroscopic binaries The binary nature is indicated in the periodic Doppler-shift of their spectral lines as they orbit around each other ...
... telescope, but the presence of the companion star is revealed by spectroscopy Such stars are called spectroscopic binaries The binary nature is indicated in the periodic Doppler-shift of their spectral lines as they orbit around each other ...
AmiraPoster3
... • Due to the heating and temperature dependence of spectral lines, the shift in line centre may vary significantly. • In this study we only used the helium lines for cross-correlation, so these effects can be ignored. • To correct for the heating effects we ran models using the sophisticated light-c ...
... • Due to the heating and temperature dependence of spectral lines, the shift in line centre may vary significantly. • In this study we only used the helium lines for cross-correlation, so these effects can be ignored. • To correct for the heating effects we ran models using the sophisticated light-c ...
13 - Joe Griffin Media Ministries
... this a couple of times while explaining the Carousel. The Enochian School teaches that the starry story begins with Virgo (virgin birth) and ends with Leo (Second Advent) and in between is the angelic conflict being resolved by fulfillment of the Lord’s prophecy in Genesis 3:15. It is quite possible ...
... this a couple of times while explaining the Carousel. The Enochian School teaches that the starry story begins with Virgo (virgin birth) and ends with Leo (Second Advent) and in between is the angelic conflict being resolved by fulfillment of the Lord’s prophecy in Genesis 3:15. It is quite possible ...
lecture_5_mbu_b
... Energy release can be calculated from E=mc2 – e.g. in H fusion 4 x 11H atoms 1 x 42He atom Mass of 4 x 11H atoms = 4 x 1.6729x10-27kg = 6.6916x10-27kg Mass of 1 x 42He atom = 1 x 6.646477x10-27kg E = (4 x 11H atoms - 42He atom)c2 = (6.6916x10-27kg - 6.646477x10-27kg)c2 = 4x10-12J ...
... Energy release can be calculated from E=mc2 – e.g. in H fusion 4 x 11H atoms 1 x 42He atom Mass of 4 x 11H atoms = 4 x 1.6729x10-27kg = 6.6916x10-27kg Mass of 1 x 42He atom = 1 x 6.646477x10-27kg E = (4 x 11H atoms - 42He atom)c2 = (6.6916x10-27kg - 6.646477x10-27kg)c2 = 4x10-12J ...
Lecture 5
... Energy release can be calculated from E=mc2 – e.g. in H fusion 4 x 11H atoms 1 x 42He atom Mass of 4 x 11H atoms = 4 x 1.6729x10-27kg = 6.6916x10-27kg Mass of 1 x 42He atom = 1 x 6.646477x10-27kg E = (4 x 11H atoms - 42He atom)c2 = (6.6916x10-27kg - 6.646477x10-27kg)c2 = 4x10-12J ...
... Energy release can be calculated from E=mc2 – e.g. in H fusion 4 x 11H atoms 1 x 42He atom Mass of 4 x 11H atoms = 4 x 1.6729x10-27kg = 6.6916x10-27kg Mass of 1 x 42He atom = 1 x 6.646477x10-27kg E = (4 x 11H atoms - 42He atom)c2 = (6.6916x10-27kg - 6.646477x10-27kg)c2 = 4x10-12J ...
Stellar Evolution II
... Larger clouds of gas (GMCs) tend to fragment into smaller ones before collapsing to form stars – very massive stars are rare • Stars with masses above 50 MSUN are unstable – nuclear reactions in their core produce energy at such a fast rate that they blow off their outer layers, losing mass. ...
... Larger clouds of gas (GMCs) tend to fragment into smaller ones before collapsing to form stars – very massive stars are rare • Stars with masses above 50 MSUN are unstable – nuclear reactions in their core produce energy at such a fast rate that they blow off their outer layers, losing mass. ...
About SDSS - Astro Projects
... telescopes, and the longer the exposure times needed to see them. Fortunately, modern telescopes no longer need to rely on the human eye looking through an eyepiece. Instead they use electronic detectors ('CCDs') which are very similar to the chips found in ordinary digital cameras (except that inst ...
... telescopes, and the longer the exposure times needed to see them. Fortunately, modern telescopes no longer need to rely on the human eye looking through an eyepiece. Instead they use electronic detectors ('CCDs') which are very similar to the chips found in ordinary digital cameras (except that inst ...
Sample Exam for 3 rd Astro Exam
... A. In the galactic halo. B. In the galactic nuclear bulge C. Beyond the Sun above and below the galactic mid-plane D. Perpendicular to the galactic plane. E. In the galactic mid-plane 16. True or false: The Sun is located within the galactic gas layer of the Milky Way A. True B. False C. I have no @ ...
... A. In the galactic halo. B. In the galactic nuclear bulge C. Beyond the Sun above and below the galactic mid-plane D. Perpendicular to the galactic plane. E. In the galactic mid-plane 16. True or false: The Sun is located within the galactic gas layer of the Milky Way A. True B. False C. I have no @ ...
Lecture 8: The Stars - Department of Physics and Astronomy
... Out to a distance of 4 pc, 12 light, from the Sun, there are 30 stars. The brightest is Sirius, which can be seen in the night sky. Only 10 are bright enough to see with the naked eye. The rest have been discovered through telescopic surveys of the sky. ...
... Out to a distance of 4 pc, 12 light, from the Sun, there are 30 stars. The brightest is Sirius, which can be seen in the night sky. Only 10 are bright enough to see with the naked eye. The rest have been discovered through telescopic surveys of the sky. ...
Origin of stars
... cloud collapses gravitationally into a star … is still a challenging theoretical problem… Astronomers have yet to find an interstellar cloud in the actual process of collapse.” ...
... cloud collapses gravitationally into a star … is still a challenging theoretical problem… Astronomers have yet to find an interstellar cloud in the actual process of collapse.” ...
lab 11 only - Penn State University
... The celestial sphere is divided up in a system like the \longitude-latitude" system on the Earth's surface. The latitude of an object in the sky is called the declination; an object (like Polaris) whose position is over the Earth's north pole has a declination of +90 degrees; an object over the sout ...
... The celestial sphere is divided up in a system like the \longitude-latitude" system on the Earth's surface. The latitude of an object in the sky is called the declination; an object (like Polaris) whose position is over the Earth's north pole has a declination of +90 degrees; an object over the sout ...
30 Doradus - HubbleSOURCE
... 1. Gigantic regions of star formation are complex systems where different generations of star affect each other’s evolution 2. At high redshift we cannot see the complexity of the star forming regions, and we derive a simplified history of star formation 3. A comparison between what we see in nearby ...
... 1. Gigantic regions of star formation are complex systems where different generations of star affect each other’s evolution 2. At high redshift we cannot see the complexity of the star forming regions, and we derive a simplified history of star formation 3. A comparison between what we see in nearby ...
Lecture101602
... how we see most objects in this room how we see planets, the Moon, asteroids, etc glow of hot materials or from fusion how the Sun glows how we see comets ...
... how we see most objects in this room how we see planets, the Moon, asteroids, etc glow of hot materials or from fusion how the Sun glows how we see comets ...
Spatial distribution of stars in the Milky Way
... stars are seen fill progressively larger spheres. There are only a handful of the earliest types in the sphere (O, B and A) stars. These are in black, and there is an indication that they are more restricted to the plane than the other types. ...
... stars are seen fill progressively larger spheres. There are only a handful of the earliest types in the sphere (O, B and A) stars. These are in black, and there is an indication that they are more restricted to the plane than the other types. ...
Link again
... smaller galaxies with only a hundred million stars and larger galaxies that have such strong gravitational pull that they absorb their neighbors. Our galaxy (Milky Way) in a pinwheel with spiral arms that contain sites of active star formation. Something is sending out energy from the center of our ...
... smaller galaxies with only a hundred million stars and larger galaxies that have such strong gravitational pull that they absorb their neighbors. Our galaxy (Milky Way) in a pinwheel with spiral arms that contain sites of active star formation. Something is sending out energy from the center of our ...
Astronomy
... smaller galaxies with only a hundred million stars and larger galaxies that have such strong gravitational pull that they absorb their neighbors. Our galaxy (Milky Way) in a pinwheel with spiral arms that contain sites of active star formation. Something is sending out energy from the center of our ...
... smaller galaxies with only a hundred million stars and larger galaxies that have such strong gravitational pull that they absorb their neighbors. Our galaxy (Milky Way) in a pinwheel with spiral arms that contain sites of active star formation. Something is sending out energy from the center of our ...
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.