Black Holes: Edge of Infinity Jonathan McKinney
... Photon Sphere: Inside, objects cannot orbit at all, at (~3/2rH for a=0) Static Limit: Inside, objects cannot be static (varies from 1rH to 2rH for a=M) Horizon or Schwarzschild radius: Inside rH, objects must fall Singularity: Near, physics breaks down (need quantum gravity), reached in finite time ...
... Photon Sphere: Inside, objects cannot orbit at all, at (~3/2rH for a=0) Static Limit: Inside, objects cannot be static (varies from 1rH to 2rH for a=M) Horizon or Schwarzschild radius: Inside rH, objects must fall Singularity: Near, physics breaks down (need quantum gravity), reached in finite time ...
Lecture course problems
... The rotation speed of a point on the surface of Jupiter at the equator is 43 000 km h1. Calculate the Doppler shifts for the H line observed from points on the extreme left and extreme right of Jupiter’s equator, as viewed from earth. What would be the Doppler shift for a point ...
... The rotation speed of a point on the surface of Jupiter at the equator is 43 000 km h1. Calculate the Doppler shifts for the H line observed from points on the extreme left and extreme right of Jupiter’s equator, as viewed from earth. What would be the Doppler shift for a point ...
Handout from Allaire Star Party
... S*T*A*R is a registered non-profit educational amateur astronomy society. Meetings are the first Thursday of each month, except July and August, at 8:00 PM at the King of Kings Lutheran Church, 250 Harmony Rd. in Middletown (intersection of Harmony and Cherry Tree Farm Rd.). Membership is open to an ...
... S*T*A*R is a registered non-profit educational amateur astronomy society. Meetings are the first Thursday of each month, except July and August, at 8:00 PM at the King of Kings Lutheran Church, 250 Harmony Rd. in Middletown (intersection of Harmony and Cherry Tree Farm Rd.). Membership is open to an ...
September 3 and 5 slides
... Curtis noted that many of the spirals had dark, thick bands of obscuring material and gave 3 big “ifs”: (1) if the MW has such a band, (2) if we are located in the mid-plane of the band, and (3) if the spirals are located outside the MW, then the Zone of Avoidance is caused by the obscuring material ...
... Curtis noted that many of the spirals had dark, thick bands of obscuring material and gave 3 big “ifs”: (1) if the MW has such a band, (2) if we are located in the mid-plane of the band, and (3) if the spirals are located outside the MW, then the Zone of Avoidance is caused by the obscuring material ...
The Big Dipper Constellation
... The Big Dipper What is a Constellation? From very early times, man has been fascinated by the stars. Early stargazers began naming stars. They also noticed patterns of stars that appeared night after night in the sky. These patterns or groupings of stars are called constellations. They also began to ...
... The Big Dipper What is a Constellation? From very early times, man has been fascinated by the stars. Early stargazers began naming stars. They also noticed patterns of stars that appeared night after night in the sky. These patterns or groupings of stars are called constellations. They also began to ...
Chapter 12 (Sun)
... A. emits and absorbs all radiation with 50% efficiency. B. emits and absorbs all radiation with 100% efficiency.. C. contains no material and is therefore a vacuum. D. warps spacetime into a singularity. 16. One recent development in astrophysics seems to confuse our understanding of the process of ...
... A. emits and absorbs all radiation with 50% efficiency. B. emits and absorbs all radiation with 100% efficiency.. C. contains no material and is therefore a vacuum. D. warps spacetime into a singularity. 16. One recent development in astrophysics seems to confuse our understanding of the process of ...
printer-friendly version of benchmark
... To learn more about the properties of the Sun, such as its core temperature and density, go to http://www.seds.org/nineplanets/nineplanets/sol.html. The fusion of hydrogen into helium constitutes what astronomers call the star’s “main sequence” lifetime – roughly analogous to a person’s middle age. ...
... To learn more about the properties of the Sun, such as its core temperature and density, go to http://www.seds.org/nineplanets/nineplanets/sol.html. The fusion of hydrogen into helium constitutes what astronomers call the star’s “main sequence” lifetime – roughly analogous to a person’s middle age. ...
Where to Look: Habitable Zones
... Complex life is rare, microbial life may be abundant The timescales for life extinguishing events like gamma ray bursts is roughly the same timescale that it takes for intelligent life to arise Threats from supernovae and close planetary system encounters ...
... Complex life is rare, microbial life may be abundant The timescales for life extinguishing events like gamma ray bursts is roughly the same timescale that it takes for intelligent life to arise Threats from supernovae and close planetary system encounters ...
Scales of the Universe
... The corona is so hot that it emits X-ray radiation Rotation period: about a month The middle rotates faster than the north or south. Corona has an emission line spectrum and a continuum spectrum (dust scattering of photospheric black body light). Some of the continuum spectrum has no absorption line ...
... The corona is so hot that it emits X-ray radiation Rotation period: about a month The middle rotates faster than the north or south. Corona has an emission line spectrum and a continuum spectrum (dust scattering of photospheric black body light). Some of the continuum spectrum has no absorption line ...
CONSTELLATION URSA MAJOR, THE GREAT
... Ursa Major (also known as the Great Bear) is a constellation in the northern celestial hemisphere. It was one of the 48 constellations listed by Ptolemy (second century AD), and remains one of the 88 modern constellations. It can be visible throughout the year in most of the northern hemisphere. Its ...
... Ursa Major (also known as the Great Bear) is a constellation in the northern celestial hemisphere. It was one of the 48 constellations listed by Ptolemy (second century AD), and remains one of the 88 modern constellations. It can be visible throughout the year in most of the northern hemisphere. Its ...
slide-show source file - Bartol Research Institute
... For hot, luminous stars the driving is generally thought to stem from radiation pressure acting through line scattering. The Doppler shift of the line-profile within the expanding wind effectively “sweeps out” the star’s continuum momentum flux. This makes the driving force a function of the wind ...
... For hot, luminous stars the driving is generally thought to stem from radiation pressure acting through line scattering. The Doppler shift of the line-profile within the expanding wind effectively “sweeps out” the star’s continuum momentum flux. This makes the driving force a function of the wind ...
May 2010 - Pomona Valley Amateur Astronomers
... Gary Thompson shared with us his experience doing an event for the blind with Project Bright Sky at Joshua Tree State Park. Take a look at the amazing events Club Member Frank Busutil puts on at http://brightsky.pvaa.us/. Our speaker was member Matt Wedel, teacher of Anatomy at Western University of ...
... Gary Thompson shared with us his experience doing an event for the blind with Project Bright Sky at Joshua Tree State Park. Take a look at the amazing events Club Member Frank Busutil puts on at http://brightsky.pvaa.us/. Our speaker was member Matt Wedel, teacher of Anatomy at Western University of ...
The Milky Way Galaxy
... • Surveys of Giant Molecular Clouds (GMCs) are likely to trace the spiral arms since these are sites of star formation • positions interior to Sun’s orbit in Galaxy have some distance ambiguity •Less distance ambiguity outside of Solar orbit, and better evidence of arm-like morphology ...
... • Surveys of Giant Molecular Clouds (GMCs) are likely to trace the spiral arms since these are sites of star formation • positions interior to Sun’s orbit in Galaxy have some distance ambiguity •Less distance ambiguity outside of Solar orbit, and better evidence of arm-like morphology ...
Intro to Spectroscopy
... Motion away from us results in a “red shift” Motion towards us results in a “blue shift ...
... Motion away from us results in a “red shift” Motion towards us results in a “blue shift ...
Fingerprints in Sunlight - VCI
... Motion away from us results in a “red shift” Motion towards us results in a “blue shift ...
... Motion away from us results in a “red shift” Motion towards us results in a “blue shift ...
Chapter 26
... its outward pressure is overcome by gravity. • Its core contracts and increases in temperature. • The outer layers expand and cool. • In this late stage of its life cycle, an average star like our Sun is called a giant. ...
... its outward pressure is overcome by gravity. • Its core contracts and increases in temperature. • The outer layers expand and cool. • In this late stage of its life cycle, an average star like our Sun is called a giant. ...
20 pm - Starmap
... many more details will be apparent. Using binoculars, preferably with a tripod, will considerably enhance your star gazing experience. Many deep sky objects like galaxies and clusters will be within reach. Jupiter satellites and Saturn’s rings will also be visible. A spectacular experience for begin ...
... many more details will be apparent. Using binoculars, preferably with a tripod, will considerably enhance your star gazing experience. Many deep sky objects like galaxies and clusters will be within reach. Jupiter satellites and Saturn’s rings will also be visible. A spectacular experience for begin ...
Astronomy Final C - Tarleton State University
... 4. Genetic replication involves A.nucleic acids B.ATP C.amino acids D.genetic replication involves all of these 5. Degenerate gases ? cool without losing their pressure. A.can B.cannot 6. ? develop where supernova explosions leave behind a “core” of approximately 1.4 to 2 or 3 stellar masses. A.Brow ...
... 4. Genetic replication involves A.nucleic acids B.ATP C.amino acids D.genetic replication involves all of these 5. Degenerate gases ? cool without losing their pressure. A.can B.cannot 6. ? develop where supernova explosions leave behind a “core” of approximately 1.4 to 2 or 3 stellar masses. A.Brow ...
R136a1
RMC 136a1 (usually abbreviated to R136a1) is a Wolf-Rayet star located at the center of R136, the central condensation of stars of the large NGC 2070 open cluster in the Tarantula Nebula. It lies at a distance of about 50 kiloparsecs (163,000 light-years) in the Large Magellanic Cloud. It has the highest mass and luminosity of any known star, at 265 M☉ and 8.7 million L☉, and also one of the hottest at over 50,000 K.