The hawaiian star compass and the unit circle
... Hoʻopaʻanaʻau or “memorization” (figuratively) represents a commonly-held value within both Hawaiian and Western intellectual traditions (H. Akaka, personal communication, April 27, 2011). For example, kilolani (expert navigators) must memorize the position of as many stars as possible, so that on c ...
... Hoʻopaʻanaʻau or “memorization” (figuratively) represents a commonly-held value within both Hawaiian and Western intellectual traditions (H. Akaka, personal communication, April 27, 2011). For example, kilolani (expert navigators) must memorize the position of as many stars as possible, so that on c ...
stars and beyond - Math/Science Nucleus
... A celestial globe shows the complete northern and southern hemispheres and the main stars of each hemisphere. It is divided into 88 regions called constellations. The purple band that runs around the globe is the Milky Way Galaxy. The dotted line within this band is the galactic equator. There is a ...
... A celestial globe shows the complete northern and southern hemispheres and the main stars of each hemisphere. It is divided into 88 regions called constellations. The purple band that runs around the globe is the Milky Way Galaxy. The dotted line within this band is the galactic equator. There is a ...
Cepheid Variable Star RS Puppis
... Called RS Puppis, this star rhythmically brightens and dims over a six-week period. The star is about 10 times more massive than our Sun and around 200 times larger. Leavitt went on to discover a direct relationship between the time it took a Cepheid variable to go from bright to dim to how bright i ...
... Called RS Puppis, this star rhythmically brightens and dims over a six-week period. The star is about 10 times more massive than our Sun and around 200 times larger. Leavitt went on to discover a direct relationship between the time it took a Cepheid variable to go from bright to dim to how bright i ...
The Hertzsprung-Russell Diagramm
... luminosity classes range from I for supergiant stars to VI for subdwarfs (table 5). By a detailed analysis of a stars spectra and it’s absorption lines, it is possible to classify it in this M-K system. Our sun is a G2 V, Betelgeuse a M2 Ia star. In figure 9 are shown A-class stars of different lumi ...
... luminosity classes range from I for supergiant stars to VI for subdwarfs (table 5). By a detailed analysis of a stars spectra and it’s absorption lines, it is possible to classify it in this M-K system. Our sun is a G2 V, Betelgeuse a M2 Ia star. In figure 9 are shown A-class stars of different lumi ...
The Formation of High Mass Stars
... Lower surface density cases have a less concentrated gravitational potential and therefore show slower accretion per unit of free fall time than higher surface density which have a higher SFR ...
... Lower surface density cases have a less concentrated gravitational potential and therefore show slower accretion per unit of free fall time than higher surface density which have a higher SFR ...
A Search for New Solar-Type Post-T Tauri Stars in
... additional 6% (11/189) plausibly 100-600 Myr, and the rest much older (distributed in age consistent with a nearly constant rate of star formation over the entire age of the galactic disk; see also Henry et al., 1996; AJ 111, 439). Despite the negligible surface density of any such very nearby, mode ...
... additional 6% (11/189) plausibly 100-600 Myr, and the rest much older (distributed in age consistent with a nearly constant rate of star formation over the entire age of the galactic disk; see also Henry et al., 1996; AJ 111, 439). Despite the negligible surface density of any such very nearby, mode ...
october 2008 - Mahoning Valley Astronomical Society
... solar panels, once deployed, became a tension structure. These artic dust devils are much smaller than those spotted by MER Spirit which is closer to the Martian equator. Spotting a cycle? This past September 22, a new sunspot was seen breaking out on the sun. It was a fast-growing active region wit ...
... solar panels, once deployed, became a tension structure. These artic dust devils are much smaller than those spotted by MER Spirit which is closer to the Martian equator. Spotting a cycle? This past September 22, a new sunspot was seen breaking out on the sun. It was a fast-growing active region wit ...
Advanced Burning Stages - Michigan State University
... star has to readjust to a new configuration Qualitative argument: • need about the same Luminosity – similar temperature gradient dT/dr • now much higher Tc – need larger star for same dT/dr Lower mass stars become red giants during shell H-burning ...
... star has to readjust to a new configuration Qualitative argument: • need about the same Luminosity – similar temperature gradient dT/dr • now much higher Tc – need larger star for same dT/dr Lower mass stars become red giants during shell H-burning ...
Family of stars - Inside Mines
... A word of caution This is the Sun full absorption spectrum in the visible • Absorption lines for H, He, but also C, O, Ne, Fe and many more elements • The raw analysis of this spectrum lead astronomers to believe that the Sun’s surface composition was very similar to what is observed on Earth. • In ...
... A word of caution This is the Sun full absorption spectrum in the visible • Absorption lines for H, He, but also C, O, Ne, Fe and many more elements • The raw analysis of this spectrum lead astronomers to believe that the Sun’s surface composition was very similar to what is observed on Earth. • In ...
19. Our Galaxy 19.1 The Milky Way Revealed Our goals for learning
... • What is the significance of a rotation curve that is flat at large distances from the galactic center? • The Milky Way’s flat rotation curve implies that the matter associated with our galaxy extends to large distances from the center. A rotation curve is a plot of the orbital speed of stars or ga ...
... • What is the significance of a rotation curve that is flat at large distances from the galactic center? • The Milky Way’s flat rotation curve implies that the matter associated with our galaxy extends to large distances from the center. A rotation curve is a plot of the orbital speed of stars or ga ...
Document
... 5. The Sun is how many times more massive than Jupiter? b. 1,000 6. The monster truck and junk car represent which stars? a. Regulus/Sun 7. Regulus is ____ times more massive than our Sun. b. 3 8. The most massive star we now is how many times more massive than our Sun? d. Between 250-300 times ...
... 5. The Sun is how many times more massive than Jupiter? b. 1,000 6. The monster truck and junk car represent which stars? a. Regulus/Sun 7. Regulus is ____ times more massive than our Sun. b. 3 8. The most massive star we now is how many times more massive than our Sun? d. Between 250-300 times ...
Time From the Perspective of a Particle Physicist
... • Stars “move” East to West over the course of one Night (in circle about the North Star) • Stars “move” East to West by 2 hours per month and “return” to the same position after one Year • It’s just caused by Earth’s daily spin and yearly orbit about the Sun • Star wheel depends on latitude: northe ...
... • Stars “move” East to West over the course of one Night (in circle about the North Star) • Stars “move” East to West by 2 hours per month and “return” to the same position after one Year • It’s just caused by Earth’s daily spin and yearly orbit about the Sun • Star wheel depends on latitude: northe ...
AST 207 Test 3 23 November 2009
... a. (1 pt.) At the present time, does the value of Hubble’s constant depend on the galaxy in which the observations are made? (2 pts.) Explain your reasoning. b. Simplicio erroneously believes that everything in the universe is expanding according to Hubble’s Law. At an earlier time, everything did o ...
... a. (1 pt.) At the present time, does the value of Hubble’s constant depend on the galaxy in which the observations are made? (2 pts.) Explain your reasoning. b. Simplicio erroneously believes that everything in the universe is expanding according to Hubble’s Law. At an earlier time, everything did o ...
The First Stars in the Universe
... star would also be hotter. In collaboration with Loeb and Rolf-Peter Kudritzki of the University of Hawaii Institute for Astronomy, Bromm devised theoretical models of such stars with masses between 100 and 1,000 solar masses. The models showed that the stars had surface temperatures of 100,000 kelv ...
... star would also be hotter. In collaboration with Loeb and Rolf-Peter Kudritzki of the University of Hawaii Institute for Astronomy, Bromm devised theoretical models of such stars with masses between 100 and 1,000 solar masses. The models showed that the stars had surface temperatures of 100,000 kelv ...
Document
... Only about half of this power reaches the earth's surface, meaning that a one square meter solar panel that is 15% efficient can generate about 100 watts while the sun is shining…that is enough to light six compact ...
... Only about half of this power reaches the earth's surface, meaning that a one square meter solar panel that is 15% efficient can generate about 100 watts while the sun is shining…that is enough to light six compact ...
"The Probability and Effects of an Asteroid Impact with Earth"
... 666 km over which the temperature changes by one scale factor and where T = 5770 K has been used as a typical region of the solar atmosphere. Clearly it is safe to assume that most regions of the solar atmosphere are in LTE. Exceptions are restricted to regions where the temperature changes rapidl ...
... 666 km over which the temperature changes by one scale factor and where T = 5770 K has been used as a typical region of the solar atmosphere. Clearly it is safe to assume that most regions of the solar atmosphere are in LTE. Exceptions are restricted to regions where the temperature changes rapidl ...
star
... The Expanding Universe The observed red shift in the spectra of galaxies shows that the universe is expanding. The Doppler effect can be used to determine how fast stars or galaxies are approaching or moving away from Earth. • When a star or galaxy is approaching Earth, the lines in its spectrum ar ...
... The Expanding Universe The observed red shift in the spectra of galaxies shows that the universe is expanding. The Doppler effect can be used to determine how fast stars or galaxies are approaching or moving away from Earth. • When a star or galaxy is approaching Earth, the lines in its spectrum ar ...
s-process
... When does the s-process start? Main s-process occurs during thermal pulses in AGB stars of 2-4 solar masses H mixes inward, giving 12C(p,e+)13C ...
... When does the s-process start? Main s-process occurs during thermal pulses in AGB stars of 2-4 solar masses H mixes inward, giving 12C(p,e+)13C ...
epsilon Aur
... The primary star in the system is a yellow-white supergiant, whose diameter is comparable in size with that of the Earth’s orbit around the Sun. The secondary object is a mystery. It orbits the primary star every 27 years, at a distance similar to that of Neptune from our Sun. These eclipses last fo ...
... The primary star in the system is a yellow-white supergiant, whose diameter is comparable in size with that of the Earth’s orbit around the Sun. The secondary object is a mystery. It orbits the primary star every 27 years, at a distance similar to that of Neptune from our Sun. These eclipses last fo ...
Constituents of the Milky Way
... can’t use the cluster turnoff method to measure an age. For instance, a lone G star might be young, or it might be 10 billion years old. How do we measure its age? The universe contained only hydrogen, helium, and one other element (lithium) when it was born. Stars have created heavier elements, or ...
... can’t use the cluster turnoff method to measure an age. For instance, a lone G star might be young, or it might be 10 billion years old. How do we measure its age? The universe contained only hydrogen, helium, and one other element (lithium) when it was born. Stars have created heavier elements, or ...
Latitude and Longitude in the Northern Hemisphere worksheet
... of London where, on top of a hill at the old Royal Observatory you will find the line that divides the hemispheres. This is the position from which Greenwich Mean Time is derived. The line splitting the two hemispheres is invisible, by the way. But in the forecourt of the observatory in front of one ...
... of London where, on top of a hill at the old Royal Observatory you will find the line that divides the hemispheres. This is the position from which Greenwich Mean Time is derived. The line splitting the two hemispheres is invisible, by the way. But in the forecourt of the observatory in front of one ...
IK Pegasi
IK Pegasi (or HR 8210) is a binary star system in the constellation Pegasus. It is just luminous enough to be seen with the unaided eye, at a distance of about 150 light years from the Solar System.The primary (IK Pegasi A) is an A-type main-sequence star that displays minor pulsations in luminosity. It is categorized as a Delta Scuti variable star and it has a periodic cycle of luminosity variation that repeats itself about 22.9 times per day. Its companion (IK Pegasi B) is a massive white dwarf—a star that has evolved past the main sequence and is no longer generating energy through nuclear fusion. They orbit each other every 21.7 days with an average separation of about 31 million kilometres, or 19 million miles, or 0.21 astronomical units (AU). This is smaller than the orbit of Mercury around the Sun.IK Pegasi B is the nearest known supernova progenitor candidate. When the primary begins to evolve into a red giant, it is expected to grow to a radius where the white dwarf can accrete matter from the expanded gaseous envelope. When the white dwarf approaches the Chandrasekhar limit of 1.44 solar masses (M☉), it may explode as a Type Ia supernova.