Astrophysics 14 - Black Holes
... • Supposed we have an object of mass, m on the surface of a more massive object of mass M. • How do we calculate the kinetic energy and gravitational potential energy of mass m. ...
... • Supposed we have an object of mass, m on the surface of a more massive object of mass M. • How do we calculate the kinetic energy and gravitational potential energy of mass m. ...
Document
... wide variety of systems, from an ideal gas to a cluster of galaxies to a star in equilibrium! ...
... wide variety of systems, from an ideal gas to a cluster of galaxies to a star in equilibrium! ...
Are we alone? - School of Physics
... the sky several metres away or more, it is impossible to tell how far away it is, or how big.” Is it: •A fire fly—5 metres away? •A balloon —500 metres away? •An aircraft —5 km away? •Venus —50 million km away? ...
... the sky several metres away or more, it is impossible to tell how far away it is, or how big.” Is it: •A fire fly—5 metres away? •A balloon —500 metres away? •An aircraft —5 km away? •Venus —50 million km away? ...
1” “Sky-Notes” of the Open University Astronomy Club. April 2006. 1
... Return to M89 and move 2o eastsoutheast to locate NGC4579 (M58) (9.8). From M58 sweep just over a degree east to locate NGC4621 (M59) (9.8) & NGC4649 (M60) (8.8) visible in the same low-power field. Return to M87 and move about 4o south to NGC4472 (M49) (8.4). 4o southwest of M49 is NGC4303 (M61) (9 ...
... Return to M89 and move 2o eastsoutheast to locate NGC4579 (M58) (9.8). From M58 sweep just over a degree east to locate NGC4621 (M59) (9.8) & NGC4649 (M60) (8.8) visible in the same low-power field. Return to M87 and move about 4o south to NGC4472 (M49) (8.4). 4o southwest of M49 is NGC4303 (M61) (9 ...
Chapter 22 Neutron Stars and Black Holes
... Bursts of X-rays have been observed near the center of our galaxy. A typical one appears below, as imaged in the X-ray spectrum: ...
... Bursts of X-rays have been observed near the center of our galaxy. A typical one appears below, as imaged in the X-ray spectrum: ...
BlackHoles
... According to Newton, describe how gravitational force depends on mass and distance. State the fundamental assumption of the Special Theory of Relativity? Has it been tested? Has it been disproved? How does the universe make a black hole? According to Einstein, describe why one mass exerts a force on ...
... According to Newton, describe how gravitational force depends on mass and distance. State the fundamental assumption of the Special Theory of Relativity? Has it been tested? Has it been disproved? How does the universe make a black hole? According to Einstein, describe why one mass exerts a force on ...
Images
... the phase space), and whose numbers are conserved (no creation or destruction of particles). Since these are also conditions for stars in a galaxy, then the DF for stars in a galaxy must be such that it is a solution to the CBE. c) Consider following a star as it moves through the 6-D phase space. W ...
... the phase space), and whose numbers are conserved (no creation or destruction of particles). Since these are also conditions for stars in a galaxy, then the DF for stars in a galaxy must be such that it is a solution to the CBE. c) Consider following a star as it moves through the 6-D phase space. W ...
PRS Questions (queestions after Midterm 2)
... Consider a gas cloud in space, such as the one shown at right. Suppose that it starts to collapse suddenly. What will happen to the temperature of the cloud as PRS it collapses? 1. The cloud will cool down. 2. The cloud will warm up. 3. The cloud temperature will remain the same. 4. This cannot be ...
... Consider a gas cloud in space, such as the one shown at right. Suppose that it starts to collapse suddenly. What will happen to the temperature of the cloud as PRS it collapses? 1. The cloud will cool down. 2. The cloud will warm up. 3. The cloud temperature will remain the same. 4. This cannot be ...
Thermonuclear Reactions: The Beginning and the
... From mechanics and Newton's gravitational law one can calculate the velocity needed for a body, mx, to escape the gravitational pull of a larger mass, m, where mx n m. For example, if m is the earth's mass (5.94×1024 kg), a rocket (mass mx) must have a velocity of about 11 km/s to escape from the ea ...
... From mechanics and Newton's gravitational law one can calculate the velocity needed for a body, mx, to escape the gravitational pull of a larger mass, m, where mx n m. For example, if m is the earth's mass (5.94×1024 kg), a rocket (mass mx) must have a velocity of about 11 km/s to escape from the ea ...
MEASURING THE STARS
... Hertzprung-‐Russell Diagram • Stars spend most of their lifeGme burning hydrogen into helium on the Main Sequence • When the fuel starts to run out, they expand and become Red Giant Stars • They th ...
... Hertzprung-‐Russell Diagram • Stars spend most of their lifeGme burning hydrogen into helium on the Main Sequence • When the fuel starts to run out, they expand and become Red Giant Stars • They th ...
Rosette Nebula - Westchester Amateur Astronomers
... Top row, left: H1 strain. Top row, right: L1 strain. GW150914 arrived first at L1 and 6.9 (+0.5/-0.4) ms later at H1; for a visual comparison, the H1 data are also shown, shifted in time by this amount and inverted (to account for the detectors’ relative orientations). Second row: Gravitational-wave ...
... Top row, left: H1 strain. Top row, right: L1 strain. GW150914 arrived first at L1 and 6.9 (+0.5/-0.4) ms later at H1; for a visual comparison, the H1 data are also shown, shifted in time by this amount and inverted (to account for the detectors’ relative orientations). Second row: Gravitational-wave ...
Section 19.3
... exploded outward from a single point. This idea is known as the Big Bang theory. ...
... exploded outward from a single point. This idea is known as the Big Bang theory. ...
Document
... (spheromaks) that become planetary cores. The reconnection radiation and winds heat and compress the disk causing agglomeration out to the snow line. The cores grow by collecting material infalling toward the star. They are in unstable orbits that can change radically or they can be ejected from the ...
... (spheromaks) that become planetary cores. The reconnection radiation and winds heat and compress the disk causing agglomeration out to the snow line. The cores grow by collecting material infalling toward the star. They are in unstable orbits that can change radically or they can be ejected from the ...
Introduction to Constellations
... which we see are different. The sky at 7pm looks different than the sky at 10pm. Finally, people look at the sky from different locations on the earth see different stars. ...
... which we see are different. The sky at 7pm looks different than the sky at 10pm. Finally, people look at the sky from different locations on the earth see different stars. ...
Theme 7.2 -- The Complete Solar System
... biases that are going to influence the kinds of planets we can detect and constrain our ability to draw general conclusions. For example, planets that are big in size are the easiest to find because they block off more light during transit. Planets that are large in mass are likewise easiest to find ...
... biases that are going to influence the kinds of planets we can detect and constrain our ability to draw general conclusions. For example, planets that are big in size are the easiest to find because they block off more light during transit. Planets that are large in mass are likewise easiest to find ...
Introducing a New Product
... intimately related to the Measurements on Exploding Stars, far away in Cosmos. This is linked to a great mystery in Cosmology Today, which is the possible Presence of a Dark Energy in the Universe. In Supernovae, the core collapses in less than a Second, causing a Massive Explosion. A shock wave the ...
... intimately related to the Measurements on Exploding Stars, far away in Cosmos. This is linked to a great mystery in Cosmology Today, which is the possible Presence of a Dark Energy in the Universe. In Supernovae, the core collapses in less than a Second, causing a Massive Explosion. A shock wave the ...
SUMMARY OF KEY CONCEPTS: GALAXIES AND COSMOLOGY
... and gas. Dark energy – unseen `substance’ that appears to be causing the rate of expansion of the Universe to be accelerating (the opposite of what gravity is expected to do). In addition to the evidence from spiral galaxy rotation curves, additional evidence for the existence of dark matter comes f ...
... and gas. Dark energy – unseen `substance’ that appears to be causing the rate of expansion of the Universe to be accelerating (the opposite of what gravity is expected to do). In addition to the evidence from spiral galaxy rotation curves, additional evidence for the existence of dark matter comes f ...
Star formation
Star formation is the process by which dense regions within molecular clouds in interstellar space, sometimes referred to as ""stellar nurseries"" or ""star-forming regions"", collapse to form stars. As a branch of astronomy, star formation includes the study of the interstellar medium (ISM) and giant molecular clouds (GMC) as precursors to the star formation process, and the study of protostars and young stellar objects as its immediate products. It is closely related to planet formation, another branch of astronomy. Star formation theory, as well as accounting for the formation of a single star, must also account for the statistics of binary stars and the initial mass function.In June 2015, astronomers reported evidence for Population III stars in the Cosmos Redshift 7 galaxy at z = 6.60. Such stars are likely to have existed in the very early universe (i.e., at high redshift), and may have started the production of chemical elements heavier than hydrogen that are needed for the later formation of planets and life as we know it.