Regents Earth Science – Unit 5: Astronomy
... our sun is an average yellow star the Sun produces energy by the process of nuclear fusion in its core the sun’s outer atmosphere “the corona” can be seen during a total solar eclipse the Sun has sunspots (cooler, dark in color) - spots associated with the its magnetic field these increase and decre ...
... our sun is an average yellow star the Sun produces energy by the process of nuclear fusion in its core the sun’s outer atmosphere “the corona” can be seen during a total solar eclipse the Sun has sunspots (cooler, dark in color) - spots associated with the its magnetic field these increase and decre ...
Star Formation, HR Diagram, and the Main Sequence (Professor
... Radial velocities are measured using the Doppler Shift of the star's spectrum: •Star moving towards Earth: Blueshift •Star moving away from Earth: Redshift •Star moving across our line of sight: No Shift In all cases, the Radial Velocity is Independent of Distance. ...
... Radial velocities are measured using the Doppler Shift of the star's spectrum: •Star moving towards Earth: Blueshift •Star moving away from Earth: Redshift •Star moving across our line of sight: No Shift In all cases, the Radial Velocity is Independent of Distance. ...
Lecture Summary (11/22)
... If the iron core develops, the star is destined to become a supernova. Iron does not fuse and yield energy, it takes energy away in the core. The inner regions of the star catastrophically collapse beyond the white dwarf size to a size of about 20 km across. The electrons and protons are forced toge ...
... If the iron core develops, the star is destined to become a supernova. Iron does not fuse and yield energy, it takes energy away in the core. The inner regions of the star catastrophically collapse beyond the white dwarf size to a size of about 20 km across. The electrons and protons are forced toge ...
Sequence of Stars Notes
... When a star’s core collapses, the outer portion explodes Becomes either a black hole or a neutron star (depending on mass of original star) ...
... When a star’s core collapses, the outer portion explodes Becomes either a black hole or a neutron star (depending on mass of original star) ...
–1– 2. Milky Way We know a great deal, perhaps more than any
... Fig. 1.— Panorama of the Milky Way (credit: Lund Observatory). Notice the dark patches caused by dust extinction. A Panorama of the Milky Way is shown in Fig. 1. The Galaxy appears as a thin band with dark patches which are caused by dust extinction. Many past astronomers often ignored such obvious ...
... Fig. 1.— Panorama of the Milky Way (credit: Lund Observatory). Notice the dark patches caused by dust extinction. A Panorama of the Milky Way is shown in Fig. 1. The Galaxy appears as a thin band with dark patches which are caused by dust extinction. Many past astronomers often ignored such obvious ...
NASAexplores 9-12 Lesson: Classified Stars - Science
... you while gazing into the night sky. The absolute magnitude and luminosity are used for that. They give you the relative brightness based on all of the stars being the same distance away from the earth. On this diagram, you do not see all of the individual stars. Since there are so many stars, only ...
... you while gazing into the night sky. The absolute magnitude and luminosity are used for that. They give you the relative brightness based on all of the stars being the same distance away from the earth. On this diagram, you do not see all of the individual stars. Since there are so many stars, only ...
The H-R Diagram
... The Random Walk towards the Spectral Types… • White Stars, with prominent hydrogen lines. Called them “A stars.” • Blue-white stars, with less prominent H lines, and weak helium lines. Called them “B stars” • Then, no more in this color direction, so skip some letters and… Cream colored stars, with ...
... The Random Walk towards the Spectral Types… • White Stars, with prominent hydrogen lines. Called them “A stars.” • Blue-white stars, with less prominent H lines, and weak helium lines. Called them “B stars” • Then, no more in this color direction, so skip some letters and… Cream colored stars, with ...
Lecture 10-11 - OSU Astronomy
... interpretation of stellar spectra. • Based on the then new atomic physics. ...
... interpretation of stellar spectra. • Based on the then new atomic physics. ...
3A8d
... An underlying theme throughout the course was the comparison of observed properties of galaxies with expectations from the current ΛCDM hierarchical model, which integrates a picture for the growth of galaxies with the buildup of the large scale structure of the Universe itself. (a) Describe, in rou ...
... An underlying theme throughout the course was the comparison of observed properties of galaxies with expectations from the current ΛCDM hierarchical model, which integrates a picture for the growth of galaxies with the buildup of the large scale structure of the Universe itself. (a) Describe, in rou ...
Astronomy Chap 1
... 1. How would you describe the motion of the stars visible at night? 2. How would the motion of stars change if viewed from the equator, Michigan, the North Pole? Draw a picture for each to help your answer. 3. If you watched these same stars night after night, what would change? 4. What factors ulti ...
... 1. How would you describe the motion of the stars visible at night? 2. How would the motion of stars change if viewed from the equator, Michigan, the North Pole? Draw a picture for each to help your answer. 3. If you watched these same stars night after night, what would change? 4. What factors ulti ...
Stars
... •With Newton’s modifications to Kepler’s laws, the period and size of the orbits yield the sum of the masses, while the relative distance of each star from the center of mass yields the ratio of the masses. •The ratio and sum provide each mass individually. ...
... •With Newton’s modifications to Kepler’s laws, the period and size of the orbits yield the sum of the masses, while the relative distance of each star from the center of mass yields the ratio of the masses. •The ratio and sum provide each mass individually. ...
Cosmic Distance Ladder
... the Earth causes nearby stars to appear to move relative to the more distant stars. • The annual parallax is defined as the difference in position of a star as seen from the Earth and Sun, i.e. the angle subtended at a star by the mean radius of the Earth's orbit around the Sun. ...
... the Earth causes nearby stars to appear to move relative to the more distant stars. • The annual parallax is defined as the difference in position of a star as seen from the Earth and Sun, i.e. the angle subtended at a star by the mean radius of the Earth's orbit around the Sun. ...
Astronomy 12 - hrsbstaff.ednet.ns.ca
... (ii) The Sun's principal reaction is the proton-proton (p-p) chain reaction, in which 4 hydrogen atoms (protons) are converted into a 4-He nucleus (alpha particle). Each p-p reaction releases 4.2x10-12 Joules of energy. Use this number and the luminosity of the Sun to calculate how many p-p reaction ...
... (ii) The Sun's principal reaction is the proton-proton (p-p) chain reaction, in which 4 hydrogen atoms (protons) are converted into a 4-He nucleus (alpha particle). Each p-p reaction releases 4.2x10-12 Joules of energy. Use this number and the luminosity of the Sun to calculate how many p-p reaction ...
User`s Guide to the Sky Notes
... As you observe the night sky, your view is limited to a few thousand stars that are close enough, big enough, and bright enough for us to see from our vantage point in the galaxy. Some things you think are stars are actually distant galaxies that are so far away, the light from its billions of stars ...
... As you observe the night sky, your view is limited to a few thousand stars that are close enough, big enough, and bright enough for us to see from our vantage point in the galaxy. Some things you think are stars are actually distant galaxies that are so far away, the light from its billions of stars ...
Review
... 1) Observation and explanation of observations that can be made without telescopes The changing seasons, shadows of the Sun The changing shape and location of the Moon The changing position of planets and stars (using the star chart) 2) Objects in the Solar system Types of planets – characte ...
... 1) Observation and explanation of observations that can be made without telescopes The changing seasons, shadows of the Sun The changing shape and location of the Moon The changing position of planets and stars (using the star chart) 2) Objects in the Solar system Types of planets – characte ...
Stellar Properties
... what would be the distance to the star? A)1/5, b)1. c)5, d)25 pc 2. Star A and B have same luminosity. If star A is 4 times closer to Earth then star B, then _____ to earthly viewer.: a=A is 4 x brighter, b=B is 4x brighter, c=A is 16 times brighter d=B is 16 times brighter, e=A is 64x brighter 3. A ...
... what would be the distance to the star? A)1/5, b)1. c)5, d)25 pc 2. Star A and B have same luminosity. If star A is 4 times closer to Earth then star B, then _____ to earthly viewer.: a=A is 4 x brighter, b=B is 4x brighter, c=A is 16 times brighter d=B is 16 times brighter, e=A is 64x brighter 3. A ...
Stars with mass less than 0.5 solar masses
... a bow wave that produce condensation among elements which forms new heavier elements. It’s the only way to produce the heavy elements we can find in nature. That’s why we are called sons of stars. ...
... a bow wave that produce condensation among elements which forms new heavier elements. It’s the only way to produce the heavy elements we can find in nature. That’s why we are called sons of stars. ...
chapter8
... Polaris has just about the same spectral type (and thus surface temperature) as our sun, but it is 10,000 times brighter than our sun. Thus, Polaris is 100 times larger than the sun. ...
... Polaris has just about the same spectral type (and thus surface temperature) as our sun, but it is 10,000 times brighter than our sun. Thus, Polaris is 100 times larger than the sun. ...
ppt
... “It’s not science if we can’t measure it!” We will be measuring the position of the moon, of sunset, and of Venus for much of the semester. How could we do this? How was it done in the past? ...
... “It’s not science if we can’t measure it!” We will be measuring the position of the moon, of sunset, and of Venus for much of the semester. How could we do this? How was it done in the past? ...
Conversations with the Earth
... • You need “metals” to make planets –Metals are elements heavier in mass than helium ...
... • You need “metals” to make planets –Metals are elements heavier in mass than helium ...
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.