Types of Stars
... • The change in position of an object with respect to a distant background is called parallax. • As Earth moves in its orbit, astronomers are able to observe stars from two different positions. • Astronomers measure the parallax of nearby stars to ...
... • The change in position of an object with respect to a distant background is called parallax. • As Earth moves in its orbit, astronomers are able to observe stars from two different positions. • Astronomers measure the parallax of nearby stars to ...
Chapter2
... IV. The Motion of the Planets A. The Moving Planets B. Astrology V. Astronomical Influences on Earth's Climate A. The Hypothesis B. The Evidence ...
... IV. The Motion of the Planets A. The Moving Planets B. Astrology V. Astronomical Influences on Earth's Climate A. The Hypothesis B. The Evidence ...
AST 112 – Activity #4 The Stellar Magnitude System
... necessary. Hint: Also refer to Table 4-1 above. (a) Is star J further than, closer to, or equal to 10 pc distant? ...
... necessary. Hint: Also refer to Table 4-1 above. (a) Is star J further than, closer to, or equal to 10 pc distant? ...
Lec 25.2- STELLAR EVOLUTION SUMMARY
... Supernovae should not be confused with novae. Novae are far gentler occurrences. One common class of novae called recurrent novae-is due to the nuclear ignition of gas being dumped from time to time on the hot surface of a White Dwarf from a companion star in a binary system. (Binary systems, in' wh ...
... Supernovae should not be confused with novae. Novae are far gentler occurrences. One common class of novae called recurrent novae-is due to the nuclear ignition of gas being dumped from time to time on the hot surface of a White Dwarf from a companion star in a binary system. (Binary systems, in' wh ...
(AU): Average distance from Earth to Sun
... Iron core of a high-mass star continues to collapse and becomes a super-dense Neutron Star. A teaspoon weighs 10 million tons! BUT iron core of a very-high-mass star collapses further and becomes … a Black Hole. ...
... Iron core of a high-mass star continues to collapse and becomes a super-dense Neutron Star. A teaspoon weighs 10 million tons! BUT iron core of a very-high-mass star collapses further and becomes … a Black Hole. ...
Luminosity - UCF Physics
... What the “computers” did was sift through literally 100’s of thousands of stellar spectra. Established a classification scheme based on Hydrogen lines…. The types were alphabetical….letters were assigned in declining strength of the H-lines ...
... What the “computers” did was sift through literally 100’s of thousands of stellar spectra. Established a classification scheme based on Hydrogen lines…. The types were alphabetical….letters were assigned in declining strength of the H-lines ...
observingopenclusters-2-2-1
... to the Sun Slide your scope or binoculars parallel to the dog’s back and then move west of that line. You will pick up a large rich field of stars – Open Cluster M41 Procyon (Canis Minor) Locate next large and (also close) Procyon This points the way to 2 very different open clusters in Monocerous, ...
... to the Sun Slide your scope or binoculars parallel to the dog’s back and then move west of that line. You will pick up a large rich field of stars – Open Cluster M41 Procyon (Canis Minor) Locate next large and (also close) Procyon This points the way to 2 very different open clusters in Monocerous, ...
Earth Science – Quiz 2
... C) stratosphere D) ionosphere 10. The wavelengths of radiation emitted by Earth are ________. A) longer than those emitted by the Sun B) shorter than those emitted by the Sun C) about the same as those emitted by the Sun D) none of these 11. The longest wavelengths on the electromagnetic spectrum ar ...
... C) stratosphere D) ionosphere 10. The wavelengths of radiation emitted by Earth are ________. A) longer than those emitted by the Sun B) shorter than those emitted by the Sun C) about the same as those emitted by the Sun D) none of these 11. The longest wavelengths on the electromagnetic spectrum ar ...
Sammy Nagel · Annie Jump Cannon
... She classified over 350000 stars.1.She also classified over 300 rare types of stars.2.Annie organized and collected photos for Harvard.3.She added over 300000 photos to their collection.4.Harvard had 200000 photos before Annie came, and 500000 photos after she left.5.She got an award named after her ...
... She classified over 350000 stars.1.She also classified over 300 rare types of stars.2.Annie organized and collected photos for Harvard.3.She added over 300000 photos to their collection.4.Harvard had 200000 photos before Annie came, and 500000 photos after she left.5.She got an award named after her ...
IB_Op_F_04 - Effectsmeister
... Which spectral class is most common? Which spectral class is the least common? In general, what is the relationship between the temperature of a star and its brightness? Most of the stars seem to be along a line from the upper left corner to the lower right corner of the HR Diagram. Stars which fall ...
... Which spectral class is most common? Which spectral class is the least common? In general, what is the relationship between the temperature of a star and its brightness? Most of the stars seem to be along a line from the upper left corner to the lower right corner of the HR Diagram. Stars which fall ...
qwk4
... A. A gravitational force and an electromagnetic force are canceling each other B. Only a gravitational force is acting on the piece of chalk C. Only an electromagnetic force is acting on the piece of chalk D. A gravitational force and a strong nuclear force are canceling each other ...
... A. A gravitational force and an electromagnetic force are canceling each other B. Only a gravitational force is acting on the piece of chalk C. Only an electromagnetic force is acting on the piece of chalk D. A gravitational force and a strong nuclear force are canceling each other ...
Week 9 Concept Summary - UC Berkeley Astronomy w
... The exposed core is very hot, but very small, a white dwarf. They slowly cool off, emitting blackbody radiation, but generating no new energy. Since they are held up by degeneracy pressure, there is a maximum mass beyond which gravity would overcome this pressure. Called the Chandrasekhar Limit, no ...
... The exposed core is very hot, but very small, a white dwarf. They slowly cool off, emitting blackbody radiation, but generating no new energy. Since they are held up by degeneracy pressure, there is a maximum mass beyond which gravity would overcome this pressure. Called the Chandrasekhar Limit, no ...
Exercise 4
... W is higher than that of X, so according to L = 4R2 T4, radius of W must be smaller than that of X. Thus (1) is correct. For statement 2, temperature of W = Temperature of Y, and luminosity of W is higher than that of Y, so by L = 4R2 T4, radius of W > radius of Y. Thus (2) is correct. For state ...
... W is higher than that of X, so according to L = 4R2 T4, radius of W must be smaller than that of X. Thus (1) is correct. For statement 2, temperature of W = Temperature of Y, and luminosity of W is higher than that of Y, so by L = 4R2 T4, radius of W > radius of Y. Thus (2) is correct. For state ...
chapter10
... Binary consisting of white dwarf + main-sequence or red giant star => WD accretes matter from the companion Angular momentum conservation => accreted matter forms a disk, called accretion disk. ...
... Binary consisting of white dwarf + main-sequence or red giant star => WD accretes matter from the companion Angular momentum conservation => accreted matter forms a disk, called accretion disk. ...
The new europian project ROPACS (Rocky Planets Around …
... Gliese 581 (pronounced /ˈɡliːzə/) is a red dwarf star with spectral type M3V, located 20.3 light years away from Earth. Its mass is estimated to be approximately a third of that of the Sun, and it is the 87th closest known star system to the Sun. Observations suggest that the star has at least four ...
... Gliese 581 (pronounced /ˈɡliːzə/) is a red dwarf star with spectral type M3V, located 20.3 light years away from Earth. Its mass is estimated to be approximately a third of that of the Sun, and it is the 87th closest known star system to the Sun. Observations suggest that the star has at least four ...
Astronomical Numbers
... North Celestial Pole = point directly above Earth’s North Pole (near the star Polaris). South Celestial Pole = point directly above Earth’s South Pole (no nearby star). Celestial Equator = great circle directly above the Earth’s Equator. ...
... North Celestial Pole = point directly above Earth’s North Pole (near the star Polaris). South Celestial Pole = point directly above Earth’s South Pole (no nearby star). Celestial Equator = great circle directly above the Earth’s Equator. ...
Another Old Final
... (c) Type-Ia supernovae reach peak luminosities of 109 L . Estimate the peak apparent brightness of this supernova. Would it have been visible to the naked eye on a clear night? ...
... (c) Type-Ia supernovae reach peak luminosities of 109 L . Estimate the peak apparent brightness of this supernova. Would it have been visible to the naked eye on a clear night? ...
1 Ay 124 Winter 2014 – HOMEWORK #1
... the plane if we assume that the same reddening per unit path length applies (i.e., assume all of the dust opacity comes from dust confined to the disk)? e) How do you expect the surface density of halo G5 stars to depend on apparent magnitude [hint: Imagine a fixed solid angle (e.g., 1 square degree ...
... the plane if we assume that the same reddening per unit path length applies (i.e., assume all of the dust opacity comes from dust confined to the disk)? e) How do you expect the surface density of halo G5 stars to depend on apparent magnitude [hint: Imagine a fixed solid angle (e.g., 1 square degree ...
Powerpoint Presentation (large file)
... 2. What evidence do astronomers have that the Sun is a typical star? 3. What is meant by a “first-magnitude” or “second magnitude” star? 4. Why are some stars red and others blue? 5. What are the stars made of? 6. As stars go, is our Sun especially large or small? 7. What are giant, supergiant, and ...
... 2. What evidence do astronomers have that the Sun is a typical star? 3. What is meant by a “first-magnitude” or “second magnitude” star? 4. Why are some stars red and others blue? 5. What are the stars made of? 6. As stars go, is our Sun especially large or small? 7. What are giant, supergiant, and ...
Starry Night¨ Times - October 2008
... Visible towards the southern horizon from winter through spring in the northern hemisphere, Orion is one of the most easily recognizable and beloved constellations. By far, the most popular celestial gem in the constellation of Orion is M42, The Great Orion Nebula. Although it is 1500 lightyears awa ...
... Visible towards the southern horizon from winter through spring in the northern hemisphere, Orion is one of the most easily recognizable and beloved constellations. By far, the most popular celestial gem in the constellation of Orion is M42, The Great Orion Nebula. Although it is 1500 lightyears awa ...
Objectives
... • Energy released is more than 100 times what our sun will radiate over its entire lifetime • Supernovas outshine ALL the stars in its own galaxy COMBINED!! • May even be visible on earth during daylight hours • very rare ...
... • Energy released is more than 100 times what our sun will radiate over its entire lifetime • Supernovas outshine ALL the stars in its own galaxy COMBINED!! • May even be visible on earth during daylight hours • very rare ...
Answers to Coursebook questions – Chapter E5
... released energy forces the outer layers of the star to expand rapidly and to cool down. The star thus becomes a bigger but cooler star – a red giant. ...
... released energy forces the outer layers of the star to expand rapidly and to cool down. The star thus becomes a bigger but cooler star – a red giant. ...
Ursa Minor
Ursa Minor (Latin: ""Smaller She-Bear"", contrasting with Ursa Major), also known as the Little Bear, is a constellation in the northern sky. Like the Great Bear, the tail of the Little Bear may also be seen as the handle of a ladle, hence the name Little Dipper. It was one of the 48 constellations listed by the 2nd-century astronomer Ptolemy, and remains one of the 88 modern constellations. Ursa Minor has traditionally been important for navigation, particularly by mariners, due to Polaris being the North Star.Polaris, the brightest star in the constellation, is a yellow-white supergiant and the brightest Cepheid variable star in the night sky, ranging from apparent magnitude 1.97 to 2.00. Beta Ursae Minoris, also known as Kochab, is an aging star that has swollen and cooled to become an orange giant with an apparent magnitude of 2.08, only slightly fainter than Polaris. Kochab and magnitude 3 Gamma Ursae Minoris have been called the ""guardians of the pole star"". Planets have been detected orbiting four of the stars, including Kochab. The constellation also contains an isolated neutron star—Calvera—and H1504+65, the hottest white dwarf yet discovered with a surface temperature of 200,000 K.