Peer Instruction/Active Learning
... b) HST uses a larger primary mirror. c) it gathers X-‐ray light. d) HST orbits above the atmosphere. e) it stays on the night-‐
... b) HST uses a larger primary mirror. c) it gathers X-‐ray light. d) HST orbits above the atmosphere. e) it stays on the night-‐
Practice Questions for Final
... B. A spaceship passing near a 10 solar mass black hole is much more likely to be destroyed than a spaceship passing at the same distance from the center of a 10 solar mass mainsequence star. C. If you watch someone else fall into a black hole, you will never see them cross the event horizon. However ...
... B. A spaceship passing near a 10 solar mass black hole is much more likely to be destroyed than a spaceship passing at the same distance from the center of a 10 solar mass mainsequence star. C. If you watch someone else fall into a black hole, you will never see them cross the event horizon. However ...
Slide 1
... of the Virgo Cluster (a 'rich' cluster) and about 100 other clusters including Local Grp. We are falling toward Virgo Cluster, which has three supergiant ellipticals (M87 contains accretion disk indicating BH or WH in center--a quadrillion solar masses!) The Pisces-Cetus Complex: may include 400 ric ...
... of the Virgo Cluster (a 'rich' cluster) and about 100 other clusters including Local Grp. We are falling toward Virgo Cluster, which has three supergiant ellipticals (M87 contains accretion disk indicating BH or WH in center--a quadrillion solar masses!) The Pisces-Cetus Complex: may include 400 ric ...
Time From the Perspective of a Particle Physicist
... • acquire mass, if becomes > 1.4 M(Sun) SUPERNOVA (Ia). p + e n + neutrino • Usually leaves neutron star For high mass stars • fusion continues beyond C,O to Iron • if Mass(core) > 1.4 M(Sun) core collapses in SUPERNOVA (II) • leaves either Neutron Star or Black Hole • Most SN are this type PHYS 1 ...
... • acquire mass, if becomes > 1.4 M(Sun) SUPERNOVA (Ia). p + e n + neutrino • Usually leaves neutron star For high mass stars • fusion continues beyond C,O to Iron • if Mass(core) > 1.4 M(Sun) core collapses in SUPERNOVA (II) • leaves either Neutron Star or Black Hole • Most SN are this type PHYS 1 ...
Neutron Stars
... • Our atoms were once parts of stars that died more than 4.6 billion years ago, whose remains were swept up into the solar system when the Sun formed ...
... • Our atoms were once parts of stars that died more than 4.6 billion years ago, whose remains were swept up into the solar system when the Sun formed ...
CHAPTER 30: STARS, GALAXIES AND THE UNIVERSE Analyzing
... Stars such as our sun are considered medium-sized stars. The sun has a diameter of 1,390,000 km. Most of the stars you can see in the night sky are medium-sized stars. Many stars also have about the same mass as the sun, however some stars may be more or less massive. Stellar Motion Apparent Motion ...
... Stars such as our sun are considered medium-sized stars. The sun has a diameter of 1,390,000 km. Most of the stars you can see in the night sky are medium-sized stars. Many stars also have about the same mass as the sun, however some stars may be more or less massive. Stellar Motion Apparent Motion ...
Absolute magnitude
... largest hot plate. The temperatures of the hot plates are coded: the lighter the shade of gray, the higher the temperature. ...
... largest hot plate. The temperatures of the hot plates are coded: the lighter the shade of gray, the higher the temperature. ...
Lecture 10a Neutron Star and Black Holes (Test 2 overview)
... • for neutron star: mass is similar to Sun or 1,000,000 X Mass(Earth) while radius is 10 km or .002 Radius(Earth) • surface gravity NS = 1011 Earth’s • force of gravity is resisted by degenerate neutrons • If Mass(NS) > 3xMass(Sun), neutron star collapses into BLACK HOLE whose radius approaches ...
... • for neutron star: mass is similar to Sun or 1,000,000 X Mass(Earth) while radius is 10 km or .002 Radius(Earth) • surface gravity NS = 1011 Earth’s • force of gravity is resisted by degenerate neutrons • If Mass(NS) > 3xMass(Sun), neutron star collapses into BLACK HOLE whose radius approaches ...
32Brightness
... source, where discrete colors are absorbed by atoms – From emission and absorption lines, get composition of objects and also their temperature ...
... source, where discrete colors are absorbed by atoms – From emission and absorption lines, get composition of objects and also their temperature ...
Lecture Nine (Powerpoint format) - Flash
... excited state of an atom. In an excited atomic state, an electron will transition from one state to a lower state, emitting a particle of light (a photon) in the process. In an excited nuclear state, a nucleus will transition from an excited state to a lower state, emitting a particle of light ( ...
... excited state of an atom. In an excited atomic state, an electron will transition from one state to a lower state, emitting a particle of light (a photon) in the process. In an excited nuclear state, a nucleus will transition from an excited state to a lower state, emitting a particle of light ( ...
AST 443/PHY 517 Homework 1
... 4. Which of these 5 stars can be observed at some time on this night from Cerro Tololo? At what times? 5. Which of these 5 stars is closest to the moon? What is the angular distance? 6. The sidereal time at midnight advances by 3m 56s each day. What are the best days to observe these targets? 7. Wha ...
... 4. Which of these 5 stars can be observed at some time on this night from Cerro Tololo? At what times? 5. Which of these 5 stars is closest to the moon? What is the angular distance? 6. The sidereal time at midnight advances by 3m 56s each day. What are the best days to observe these targets? 7. Wha ...
Ch.11 Massive star death
... Fusion releases energy only when the mass of the products < mass of the reactants • Iron is “ash” of fusion: nuclear reactions involving iron do not release energy • Iron-56 has lowest mass per nuclear ...
... Fusion releases energy only when the mass of the products < mass of the reactants • Iron is “ash” of fusion: nuclear reactions involving iron do not release energy • Iron-56 has lowest mass per nuclear ...
1 Intro to Astronomy
... onslaught of subatomic particles from the sun 150 million kilometers away ...
... onslaught of subatomic particles from the sun 150 million kilometers away ...
Stellar Activity
... evidence for spot modulation or spot cycles • Sometimes spots are present, sometimes not • Variable light levels – long period, low amplitude modulation? (mostly in dM’s with M>0.5MSun) • Spots may come and go on short time scales or be distributed evenly around the star • Large isolated spots are N ...
... evidence for spot modulation or spot cycles • Sometimes spots are present, sometimes not • Variable light levels – long period, low amplitude modulation? (mostly in dM’s with M>0.5MSun) • Spots may come and go on short time scales or be distributed evenly around the star • Large isolated spots are N ...
- Stevenson High School
... physically connected/bound to one another? Tell me about those stars. 4. Are there any stars that are not part of a constellation? Explain. 5. How is astrology and astronomy different? 6. How is astrology and astronomy related? 7. What is the significance of the zodiac? 8. If your zodiac sign is Vir ...
... physically connected/bound to one another? Tell me about those stars. 4. Are there any stars that are not part of a constellation? Explain. 5. How is astrology and astronomy different? 6. How is astrology and astronomy related? 7. What is the significance of the zodiac? 8. If your zodiac sign is Vir ...
Constellations
... For example, the group of seven stars usually known in North America as "the Dipper" is known as "the Wagon" or "the Plough" in Western Europe. The ancient Greeks regarded these same stars as the haunches and tail of "the Great Bear," while the Egyptians saw them as the leg of an ox. ...
... For example, the group of seven stars usually known in North America as "the Dipper" is known as "the Wagon" or "the Plough" in Western Europe. The ancient Greeks regarded these same stars as the haunches and tail of "the Great Bear," while the Egyptians saw them as the leg of an ox. ...
Deep Space Mystery Note Form 3
... Type II Type II Binary stars are when there are two stars and they revolve around each other. In these systems supernovas occur also. Stars up to eight times the mass of our sun usually evolve into white dwarfs. A star that is condensed to this size has a very strong gravitational pull. ...
... Type II Type II Binary stars are when there are two stars and they revolve around each other. In these systems supernovas occur also. Stars up to eight times the mass of our sun usually evolve into white dwarfs. A star that is condensed to this size has a very strong gravitational pull. ...
Navigating by the Stars
... What is an ellipse? Glad you asked. An ellipse is a closed, curved shape that is defined by two foci. An ellipse is a like a flattened circle. In fact, if both of the foci of an ellipse are at the same point, an ellipse becomes a circle! If you think about it, the relationship between an ellipse and ...
... What is an ellipse? Glad you asked. An ellipse is a closed, curved shape that is defined by two foci. An ellipse is a like a flattened circle. In fact, if both of the foci of an ellipse are at the same point, an ellipse becomes a circle! If you think about it, the relationship between an ellipse and ...
Planets and Stars Key Vocabulary: Comparing and Contrasting
... There are more stars in the sky than a person can count one-at-a-time during an entire lifetime. There is just one star in our solar system - the sun. The sun is a medium-sized star, but it appears larger than other stars because it is so close to Earth. ...
... There are more stars in the sky than a person can count one-at-a-time during an entire lifetime. There is just one star in our solar system - the sun. The sun is a medium-sized star, but it appears larger than other stars because it is so close to Earth. ...
Introduction
... χρ = χT = 1). Although the inner region of these stars are convective, the radiative transport dominates in the outer regions. The inferred αR = 0.78 and αL = 3.0 may be compared with the empirical fitted values of 0.75 and 3.5, respectively. In addition, we get αT = 0.22 and αρ = −1.3 so that T sho ...
... χρ = χT = 1). Although the inner region of these stars are convective, the radiative transport dominates in the outer regions. The inferred αR = 0.78 and αL = 3.0 may be compared with the empirical fitted values of 0.75 and 3.5, respectively. In addition, we get αT = 0.22 and αρ = −1.3 so that T sho ...
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.