HW7-3
... (261) Learning to Look 1-2; Supp. Q. 4 (260)RQ 2: (a) Why is there a lower end to the main sequence? (b) Why is there an upper end? (a) Stars less than 0.08M☉ (8% of M☉) are not hot enough in their cores to run fusion. These are brown dwarfs. (b) Very massive stars have so much fusion that the outwa ...
... (261) Learning to Look 1-2; Supp. Q. 4 (260)RQ 2: (a) Why is there a lower end to the main sequence? (b) Why is there an upper end? (a) Stars less than 0.08M☉ (8% of M☉) are not hot enough in their cores to run fusion. These are brown dwarfs. (b) Very massive stars have so much fusion that the outwa ...
6-Where to Survey - The Challenger Learning Center
... Details here: http://www.lewiscenter.org/gavrt/ • If you have completed GAVRT training, the following activity can be used so your students can write a persuasive essay/proposal for scanning a particular region of the Milky Way. ...
... Details here: http://www.lewiscenter.org/gavrt/ • If you have completed GAVRT training, the following activity can be used so your students can write a persuasive essay/proposal for scanning a particular region of the Milky Way. ...
Stars
... The center of our galaxy is also a copious source of x-rays and appears to be extremely massive. Stars in the Milky Way orbit around an unseen central object. Analysis of the orbital velocities of the stars about the center of the galaxy (using Kepler’s 3rd law) imply a mass of 2.6106 solar masses ...
... The center of our galaxy is also a copious source of x-rays and appears to be extremely massive. Stars in the Milky Way orbit around an unseen central object. Analysis of the orbital velocities of the stars about the center of the galaxy (using Kepler’s 3rd law) imply a mass of 2.6106 solar masses ...
A Star is
... • Apparent Motion of Stars: – motion visible to the unaided eye. Apparent motion is caused by the movement of Earth. • The rotation of Earth causes the apparent motion of stars seem as though the stars are moving counter-clockwise around the North Star. ...
... • Apparent Motion of Stars: – motion visible to the unaided eye. Apparent motion is caused by the movement of Earth. • The rotation of Earth causes the apparent motion of stars seem as though the stars are moving counter-clockwise around the North Star. ...
RR animation
... RR Lyrae stars pulse in a manner similar to Cepheid variables, so the mechanism for the pulsation is thought to be similar, but the nature and histories of these stars is thought to be rather different. (The average absolute magnitude of an RR Lyrae is 0.75, only 40 or 50 times brighter than our Sun ...
... RR Lyrae stars pulse in a manner similar to Cepheid variables, so the mechanism for the pulsation is thought to be similar, but the nature and histories of these stars is thought to be rather different. (The average absolute magnitude of an RR Lyrae is 0.75, only 40 or 50 times brighter than our Sun ...
09astrophysics_2007Nov
... If we can measure the color of a star, we can calculate its temperature (Wien’s Law) Measure magnitude of star through color filters Color Index=C.I. = B-V is measure of temperature of star. ...
... If we can measure the color of a star, we can calculate its temperature (Wien’s Law) Measure magnitude of star through color filters Color Index=C.I. = B-V is measure of temperature of star. ...
upperMS - CWRU Astronomy
... Found in OB associations (20+) and smaller OB subgroups (4-10 stars) from molecular clouds (OMC1). A small group of a few OB stars forms, they evolve and ionize gas. The HII region pushes a shock wave into the molecular cloud and compresses gas to start gravitational collapse for a new group of OB s ...
... Found in OB associations (20+) and smaller OB subgroups (4-10 stars) from molecular clouds (OMC1). A small group of a few OB stars forms, they evolve and ionize gas. The HII region pushes a shock wave into the molecular cloud and compresses gas to start gravitational collapse for a new group of OB s ...
Exploring the Universe
... absolute brightness of a sample of stars 1. H-R diagrams are used to estimate the sizes of stars and their distances, and to infer how stars change over time a. Horizontal axis=surface temperature ...
... absolute brightness of a sample of stars 1. H-R diagrams are used to estimate the sizes of stars and their distances, and to infer how stars change over time a. Horizontal axis=surface temperature ...
Stargazing Rules 01162013
... Moon is shaped like a "C", it bulges to the left. 18. Even though most of the objects we observe in the night sky appear not to move in relation to each other, in reality they are all moving at great speed relative to us and to each other. They appear not to be moving because of their great distanc ...
... Moon is shaped like a "C", it bulges to the left. 18. Even though most of the objects we observe in the night sky appear not to move in relation to each other, in reality they are all moving at great speed relative to us and to each other. They appear not to be moving because of their great distanc ...
Planetarium Key Points
... Latitude is the elevation of the visible pole and, roughly, of Polaris The motion of the sphere seems uniform, for this reason it was the source for time telling, but the time scale that comes from is NOT uniform: rotation is slowing down, the day is longer and longer at the rate of 2 ms a centu ...
... Latitude is the elevation of the visible pole and, roughly, of Polaris The motion of the sphere seems uniform, for this reason it was the source for time telling, but the time scale that comes from is NOT uniform: rotation is slowing down, the day is longer and longer at the rate of 2 ms a centu ...
Physics 1025: Lecture 17 Sun (cont.), Stellar Distances, Parallax
... astronomical questions is the distance to the stars; every class from now on will introduce at least one means for this determination – astronomers are very clever in finding indirect means, since there is only one direct method and the stars are very far away. Parallax is the only direct way to mea ...
... astronomical questions is the distance to the stars; every class from now on will introduce at least one means for this determination – astronomers are very clever in finding indirect means, since there is only one direct method and the stars are very far away. Parallax is the only direct way to mea ...
Protostar, Initial mass, Main Sequence
... Red dwarf stars with less than half a solar mass do not achieve red giant status they begin to fade as soon as their hydrogen fuel is exhausted. White dwarfs, planetary nebulae Our Sun, and any star with similar mass, will fuse to carbon and, possibly, oxygen and neon before shrinking to become a wh ...
... Red dwarf stars with less than half a solar mass do not achieve red giant status they begin to fade as soon as their hydrogen fuel is exhausted. White dwarfs, planetary nebulae Our Sun, and any star with similar mass, will fuse to carbon and, possibly, oxygen and neon before shrinking to become a wh ...
Universe and Star Formation - White Plains Public Schools
... • Only 10 percent of the known galaxies have irregular shapes and are classified as irregular galaxies. • In addition to shape and size, one of the major differences among different types of galaxies is the age of their stars. Irregular galaxies contain young stars. ...
... • Only 10 percent of the known galaxies have irregular shapes and are classified as irregular galaxies. • In addition to shape and size, one of the major differences among different types of galaxies is the age of their stars. Irregular galaxies contain young stars. ...
binary star
... • Only 10 percent of the known galaxies have irregular shapes and are classified as irregular galaxies. • In addition to shape and size, one of the major differences among different types of galaxies is the age of their stars. Irregular galaxies contain young stars. ...
... • Only 10 percent of the known galaxies have irregular shapes and are classified as irregular galaxies. • In addition to shape and size, one of the major differences among different types of galaxies is the age of their stars. Irregular galaxies contain young stars. ...
name - New York Science Teacher
... Use the Stars: Lights in the Sky (www.seasky.org/celestial-objects/stars.html) and write out the answers to the following questions on the sheet of paper provided to be turned in. 1. Name the brightest star in the known universe. _____________________________ 2. What is its magnitude? ______________ ...
... Use the Stars: Lights in the Sky (www.seasky.org/celestial-objects/stars.html) and write out the answers to the following questions on the sheet of paper provided to be turned in. 1. Name the brightest star in the known universe. _____________________________ 2. What is its magnitude? ______________ ...
The Family of Stars
... that a star would have if it were at a distance of 10 pc. If we know a star’s absolute magnitude, we can infer its distance by comparing absolute and apparent magnitudes. ...
... that a star would have if it were at a distance of 10 pc. If we know a star’s absolute magnitude, we can infer its distance by comparing absolute and apparent magnitudes. ...
STAR FORMATION (Ch. 19)
... very young (less than ~ few million years) Some have MS only populated up to yellowish (cooler, less massive) spectral types most massive stars have died, so older. Can see that you can get ages of clusters by extent of the MS. Find that open cluster ages vary from very young (~few million yr.) to ...
... very young (less than ~ few million years) Some have MS only populated up to yellowish (cooler, less massive) spectral types most massive stars have died, so older. Can see that you can get ages of clusters by extent of the MS. Find that open cluster ages vary from very young (~few million yr.) to ...
Answers Universe Cornell Notes Chapter 8, Sec 2
... What does a star’s brightness depend on? What is apparent magnitude? What is absolute magnitude? What is the HertsprungRussell Diagram? What does it show? ...
... What does a star’s brightness depend on? What is apparent magnitude? What is absolute magnitude? What is the HertsprungRussell Diagram? What does it show? ...
Document
... 4. A small, hot, dim star that is the leftover center of an old star is called a ___________ ____________. 5. A cloud of gases and dust that forms before the birth of a star is a _________. 6. An apparent shift in the position of an object when viewed from different locations is ____________________ ...
... 4. A small, hot, dim star that is the leftover center of an old star is called a ___________ ____________. 5. A cloud of gases and dust that forms before the birth of a star is a _________. 6. An apparent shift in the position of an object when viewed from different locations is ____________________ ...
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.