Reader`s Theater Our Closest Star
... strong enough to hold all of the parts of this system together. Is it any wonder the system is named after me? I am a star, your closest star. I may be millions of times closer to you than other stars, but I am still very far away. It would take a jet plane nineteen years to reach me. But, of course ...
... strong enough to hold all of the parts of this system together. Is it any wonder the system is named after me? I am a star, your closest star. I may be millions of times closer to you than other stars, but I am still very far away. It would take a jet plane nineteen years to reach me. But, of course ...
Stellar Evolution - Lick Observatory
... • Lower mass limit for stars is 0.08 solar masses -this is the mass below which the central temperature is <10 million K • Upper mass limit is around 100 solar masses set by inability for a star to hang on to its outer layers because high radiation pressure (high luminosity). ...
... • Lower mass limit for stars is 0.08 solar masses -this is the mass below which the central temperature is <10 million K • Upper mass limit is around 100 solar masses set by inability for a star to hang on to its outer layers because high radiation pressure (high luminosity). ...
O star
... spectral type and the luminosity class of a star from its spectrum. This is extraordinarily valuable, as it means that, just from the spectrum of a star, one can plot it in on the H-R diagram. BUT: if you can plot a star on the H-R diagram, you know its absolute magnitude! And if you know its absolu ...
... spectral type and the luminosity class of a star from its spectrum. This is extraordinarily valuable, as it means that, just from the spectrum of a star, one can plot it in on the H-R diagram. BUT: if you can plot a star on the H-R diagram, you know its absolute magnitude! And if you know its absolu ...
PHY 116 From Newton to Einstein Model Answers to Exercise Sheet 5
... star with angular speed ω0 = 70.4 rad/s underwent such a glitch in October 1975 that increased its angular speed to ω = ω0 + Δω, where Δω/ω0 = 2.01 x 10-6. If the radius of the neutron star before the glitch was 11 km, by how much did the radius decrease in the starquake? Assume that the neutron sta ...
... star with angular speed ω0 = 70.4 rad/s underwent such a glitch in October 1975 that increased its angular speed to ω = ω0 + Δω, where Δω/ω0 = 2.01 x 10-6. If the radius of the neutron star before the glitch was 11 km, by how much did the radius decrease in the starquake? Assume that the neutron sta ...
Two Summers in the UCSC Science Internship Program
... Science that year, I hoped to apply computer programming to cutting-edge research in astrophysics. I was excited when I was assigned to work with Dr. Guhathakurta and Dr. Evan Kirby of Caltech, as well as another high school student who was my partner. ...
... Science that year, I hoped to apply computer programming to cutting-edge research in astrophysics. I was excited when I was assigned to work with Dr. Guhathakurta and Dr. Evan Kirby of Caltech, as well as another high school student who was my partner. ...
Powerpoint for today
... temperature from spectrum (black-body curve or spectral lines), then find surface area, then find radius (sphere surface area is 4 p R2) ...
... temperature from spectrum (black-body curve or spectral lines), then find surface area, then find radius (sphere surface area is 4 p R2) ...
THE ABSOLUTE MAGNITUDE OF RR LYRAE - Cosmos
... stars with larger relative errors have brighter luminosities, i.e., have smaller parallaxes, appears clearly when the true parallax is small, compared with error of parallax. Similarly the distant stars have too faint luminosities, i.e., have too large parallaxes, mainly because the true parallax is ...
... stars with larger relative errors have brighter luminosities, i.e., have smaller parallaxes, appears clearly when the true parallax is small, compared with error of parallax. Similarly the distant stars have too faint luminosities, i.e., have too large parallaxes, mainly because the true parallax is ...
Earth`s Motion and Seasons
... a. Earth’s revolution causes seasons. b. Earth’s elliptical path around the sun is called an orbit. ...
... a. Earth’s revolution causes seasons. b. Earth’s elliptical path around the sun is called an orbit. ...
Stellar Evolution – Life of a Star
... Sun…a MAIN SEQUENCE STAR. It has been burning for about 4.5 billion years…and will continue to burn as such for another 4.5 billion years. • Most stars are Main Sequence Stars (recall the Hertizsprung-Russell Diagram) ...
... Sun…a MAIN SEQUENCE STAR. It has been burning for about 4.5 billion years…and will continue to burn as such for another 4.5 billion years. • Most stars are Main Sequence Stars (recall the Hertizsprung-Russell Diagram) ...
Nobel Prize in Physics for Accelerating Universe
... water similar to the water we find on Earth. • “Similar” means that the fraction of heavy water is same as in our oceans. • Heavy water is D2O instead of H2O, where D is deuterium which has a nucleus with one proton and one neutron. • The comet comes from the Kupier belt (30-50 AU) while most comets ...
... water similar to the water we find on Earth. • “Similar” means that the fraction of heavy water is same as in our oceans. • Heavy water is D2O instead of H2O, where D is deuterium which has a nucleus with one proton and one neutron. • The comet comes from the Kupier belt (30-50 AU) while most comets ...
Sirius Astronomer - Orange County Astronomers
... a bright star that appears to be the least massive exoplanet directly observed. Although nearly 1000 exoplanets have been discovered, only about a dozen have been directly imaged. The mass was estimated from its brightness, and appears to be 4-5 times that of Jupiter. The object was imaged in infrar ...
... a bright star that appears to be the least massive exoplanet directly observed. Although nearly 1000 exoplanets have been discovered, only about a dozen have been directly imaged. The mass was estimated from its brightness, and appears to be 4-5 times that of Jupiter. The object was imaged in infrar ...
E1 Introduction to the universe
... Astrophysicists are attempting to come up with theories to explain why there is so much dark matter and what it consists of. There are a number of possible theories: ...
... Astrophysicists are attempting to come up with theories to explain why there is so much dark matter and what it consists of. There are a number of possible theories: ...
Energy Transport
... • Hydrogen atoms are ionized (bare nuclei) • Nuclei repel each other (Coulomb barrier) • High enough temperature means a small percentage will have a high enough energy to get close enough for strong interaction to occur (Maxwell distribution of velocities) • Sufficiently high pressure ensures that ...
... • Hydrogen atoms are ionized (bare nuclei) • Nuclei repel each other (Coulomb barrier) • High enough temperature means a small percentage will have a high enough energy to get close enough for strong interaction to occur (Maxwell distribution of velocities) • Sufficiently high pressure ensures that ...
May 2013 - Joliet Junior College
... the Lion with the bright star, Regulas, marking his chin. On the 15th, if you look to the east of the moon with a pair of binoculars, you will find the Beehive cluster - a cluster of stars in the constellation of Cancer. They are an awesome sight in binoculars. Follow the curve of the Big Dipper’s h ...
... the Lion with the bright star, Regulas, marking his chin. On the 15th, if you look to the east of the moon with a pair of binoculars, you will find the Beehive cluster - a cluster of stars in the constellation of Cancer. They are an awesome sight in binoculars. Follow the curve of the Big Dipper’s h ...
Chapter 13 section 3
... What is a white dwarf? The star’s core contracts even more after it uses much of its helium and the outer layers escape into space. This leaves only the hot, dense core. At this stage in a star’s life cycle, it is about the size of Earth. It is called a white dwarf. In time, the white dwarf will coo ...
... What is a white dwarf? The star’s core contracts even more after it uses much of its helium and the outer layers escape into space. This leaves only the hot, dense core. At this stage in a star’s life cycle, it is about the size of Earth. It is called a white dwarf. In time, the white dwarf will coo ...
Star Birth: The Formation of Stars Jonathan Rowles
... fusion of hydrogen to form helium. They range in size from 0.08 times the mass of the Sun to up to 120 Solar masses. They can have lifetimes ranging from a few million years to the age of the universe. ...
... fusion of hydrogen to form helium. They range in size from 0.08 times the mass of the Sun to up to 120 Solar masses. They can have lifetimes ranging from a few million years to the age of the universe. ...
Galactic Star Formation Science with Integral Field
... – 170+ Emission lines detected – Many very high excitation lines of H2 and [Fe II] – Bow-shock apex shows extremely high temperature T~6000K - revealing that the H2 molecule persists in these very high temperature regions Giannini et al. “Near-infrared, IFU spectroscopy unravels the bow-shock HH99B“ ...
... – 170+ Emission lines detected – Many very high excitation lines of H2 and [Fe II] – Bow-shock apex shows extremely high temperature T~6000K - revealing that the H2 molecule persists in these very high temperature regions Giannini et al. “Near-infrared, IFU spectroscopy unravels the bow-shock HH99B“ ...
Lecture11
... that molecular hydrogen dissociates; this absorbs some of the energy supporting the protostar, so the core begins to collapse further, until it becomes ~30% larger than the present Solar radius (but still much less massive). The protostar continues to accrete material from the infalling cloud. ...
... that molecular hydrogen dissociates; this absorbs some of the energy supporting the protostar, so the core begins to collapse further, until it becomes ~30% larger than the present Solar radius (but still much less massive). The protostar continues to accrete material from the infalling cloud. ...
sc_examII_fall_2002 - University of Maryland
... 30. Given the HR Diagram, answer the following questions (1 pt. each part unless noted): Diagram will be given in Discussion Section. a) The Sun’s coordinates on the HR Diagram are: luminosity = ______ and spectral type = _______. b) Indicate on the HR Diagram above where you would find a red giant ...
... 30. Given the HR Diagram, answer the following questions (1 pt. each part unless noted): Diagram will be given in Discussion Section. a) The Sun’s coordinates on the HR Diagram are: luminosity = ______ and spectral type = _______. b) Indicate on the HR Diagram above where you would find a red giant ...
Lyra
Lyra (/ˈlaɪərə/; Latin for lyre, from Greek λύρα) is a small constellation. It is one of 48 listed by the 2nd century astronomer Ptolemy, and is one of the 88 constellations recognized by the International Astronomical Union. Lyra was often represented on star maps as a vulture or an eagle carrying a lyre, and hence sometimes referred to as Aquila Cadens or Vultur Cadens. Beginning at the north, Lyra is bordered by Draco, Hercules, Vulpecula, and Cygnus. Lyra is visible from the northern hemisphere from spring through autumn, and nearly overhead, in temperate latitudes, during the summer months. From the southern hemisphere, it is visible low in the northern sky during the winter months.The lucida or brightest star—and one of the brightest stars in the sky—is the white main sequence star Vega, a corner of the Summer Triangle. Beta Lyrae is the prototype of a class of stars known as Beta Lyrae variables, binary stars so close to each other that they become egg-shaped and material flows from one to the other. Epsilon Lyrae, known informally as the Double Double, is a complex multiple star system. Lyra also hosts the Ring Nebula, the second-discovered and best-known planetary nebula.