slides
... gravity doesn’t fully describe what happens in a black hole. If we could somehow combine Einstein’s theory with quantum physics, then we might realize that they’re much more than a big, voracious ball of nothing. ...
... gravity doesn’t fully describe what happens in a black hole. If we could somehow combine Einstein’s theory with quantum physics, then we might realize that they’re much more than a big, voracious ball of nothing. ...
A Galaxy Full of Black Holes Script
... Here is one of the activities in the ToolKit that demonstrate how mass curves or bends space – how gravitational force is caused by mass bending space around it: “Gravity & the Fabric of Space”. Have someone roll a marble across the fabric of space with no mass in it, then with the weight in the mid ...
... Here is one of the activities in the ToolKit that demonstrate how mass curves or bends space – how gravitational force is caused by mass bending space around it: “Gravity & the Fabric of Space”. Have someone roll a marble across the fabric of space with no mass in it, then with the weight in the mid ...
The Evolution of Stars - hrsbstaff.ednet.ns.ca
... here on Earth, but it is more that just that. Gravity, or gravitation, is the natural phenomenon by which all objects with mass attract other objects. Without gravity the universe would be a very different place. ...
... here on Earth, but it is more that just that. Gravity, or gravitation, is the natural phenomenon by which all objects with mass attract other objects. Without gravity the universe would be a very different place. ...
Outta This World - Kent School District
... The Moons Magic Powers The moon makes tides too! By: Alisa Emedi Special effects happen on the earth because of our moon. One special effect is a tide; this is when the water on the beach pulls up because of the moons gravitational pull. Then the moon lets it go back down because it is so tired of h ...
... The Moons Magic Powers The moon makes tides too! By: Alisa Emedi Special effects happen on the earth because of our moon. One special effect is a tide; this is when the water on the beach pulls up because of the moons gravitational pull. Then the moon lets it go back down because it is so tired of h ...
The Impossible Electric Dark Matter Black Hole
... A: That a "black hole" has no mass- it does not emit gravitons-, but is the origin of all "dark matter" in the universe and can exist at all scales from Quantum Knots (or Ball lightning) up to Comets, Sunspots, external Galaxy Anchor Black Holes, up to the Big Crunch- or Big Bang Black Hole. B: That ...
... A: That a "black hole" has no mass- it does not emit gravitons-, but is the origin of all "dark matter" in the universe and can exist at all scales from Quantum Knots (or Ball lightning) up to Comets, Sunspots, external Galaxy Anchor Black Holes, up to the Big Crunch- or Big Bang Black Hole. B: That ...
30galaxies and the universe
... instead grew on a diet of gas and stars controlled by their host galaxies in the beginning years of the universe. An initial look at 30 galaxies indicates that black holes do not precede a galaxy’s birth, but instead evolve with the galaxy by trapping an amazingly exact percentage (0.2) of the mass ...
... instead grew on a diet of gas and stars controlled by their host galaxies in the beginning years of the universe. An initial look at 30 galaxies indicates that black holes do not precede a galaxy’s birth, but instead evolve with the galaxy by trapping an amazingly exact percentage (0.2) of the mass ...
Review: How does a star`s mass determine its life story?
... pressure from neutrons. • Neutron degeneracy pressure can no longer support a neutron star against gravity if its mass exceeds about 3MSun. As neutrons would have to move faster than the speed of light to support masses above this limit. ...
... pressure from neutrons. • Neutron degeneracy pressure can no longer support a neutron star against gravity if its mass exceeds about 3MSun. As neutrons would have to move faster than the speed of light to support masses above this limit. ...
Blackbody Radiation, Stellar temperature and types
... A photon produced in the interior undergoes many scatterings before it finally leaves the star. The surface of a star is not opaque – one can see to some depth into the star. The photosphere is the region where photons can escape without further scattering. The depth of the photosphere depends on th ...
... A photon produced in the interior undergoes many scatterings before it finally leaves the star. The surface of a star is not opaque – one can see to some depth into the star. The photosphere is the region where photons can escape without further scattering. The depth of the photosphere depends on th ...
The Death of a Star
... is enough to force the electrons to react with the protons turning them all into neutrons. Without the outward resistance of the electrons the core collapses to about 50 km in radius. The amount of energy released is equal to the Sun’s luminosity for ten’s of billions of years. The remaining outer l ...
... is enough to force the electrons to react with the protons turning them all into neutrons. Without the outward resistance of the electrons the core collapses to about 50 km in radius. The amount of energy released is equal to the Sun’s luminosity for ten’s of billions of years. The remaining outer l ...
Astronomy 110 Announcements: How are the lives of stars with
... what would happen if a star orbiting in a direction opposite the neutron’s star rotation fell onto a neutron star? A. The neutron star’s rotation would speed up. B. The neutron star’s rotation would slow down. C. Nothing, the directions would cancel each other ...
... what would happen if a star orbiting in a direction opposite the neutron’s star rotation fell onto a neutron star? A. The neutron star’s rotation would speed up. B. The neutron star’s rotation would slow down. C. Nothing, the directions would cancel each other ...
Gravity and Black Holes Einstein’s Discoveries
... M= mass of BH m=mass of star region R=radius (distance to BH) •Since G is a constant, the distance from the black hole to the star doesn’t change, and we can measure the mass of the BH, the only way to make V go up is to increase the mass of the star region (m)! •Therefore, there must be some “invis ...
... M= mass of BH m=mass of star region R=radius (distance to BH) •Since G is a constant, the distance from the black hole to the star doesn’t change, and we can measure the mass of the BH, the only way to make V go up is to increase the mass of the star region (m)! •Therefore, there must be some “invis ...
Power Point Presentation - Fermi Gamma
... Hawking radiation results from the formation of virtual ...
... Hawking radiation results from the formation of virtual ...
Standard model for AGNs
... the emission mechanism of different source classes. Study the variation of spectral index in greater detail. To understand the energetics and dynamics of jet and accretion disk, one need to study the objects over a ...
... the emission mechanism of different source classes. Study the variation of spectral index in greater detail. To understand the energetics and dynamics of jet and accretion disk, one need to study the objects over a ...
Quantum Information and Spacetime
... Suppose we prepare a quantum state, encoding some information, as pressureless dust on the brink of gravitational collapse. It collapses, and begins to emit Hawking radiation. This radiation is featureless, not dependent on the information encoded in the original collapsing body. Eventually, all the ...
... Suppose we prepare a quantum state, encoding some information, as pressureless dust on the brink of gravitational collapse. It collapses, and begins to emit Hawking radiation. This radiation is featureless, not dependent on the information encoded in the original collapsing body. Eventually, all the ...
SIMPLE RADIATION TRANSFER FOR SPHERICAL STARS
... Inside a star conditions are very close to LTE, but there must be some anisotropy of the radiation field if there is a net flow of radiation from the deep interior towards the surface. We shall consider intensity of radiation as a function of radiation frequency, position inside a star, and a direct ...
... Inside a star conditions are very close to LTE, but there must be some anisotropy of the radiation field if there is a net flow of radiation from the deep interior towards the surface. We shall consider intensity of radiation as a function of radiation frequency, position inside a star, and a direct ...
Evidence for Black Holes
... a singularity beyond which trajectories cannot continue. The nature of the singularity is not fully understood, and it is probable that existing physical theories break down close to the singularity. But from an astrophysicist’s point of view this hardly matters, because the singularity is hidden fr ...
... a singularity beyond which trajectories cannot continue. The nature of the singularity is not fully understood, and it is probable that existing physical theories break down close to the singularity. But from an astrophysicist’s point of view this hardly matters, because the singularity is hidden fr ...
Plenty of Nothing: Black Hole Entropy in Induced Gravity
... becomes possible only when one appeals to a more deep underlying theory in which vacuum is equipped with an additional “fine” structure. The vacuum in the induced gravity is a ground state of “heavy” constituents. “Light” particles are just low energy collective excitations over this vacuum. The bla ...
... becomes possible only when one appeals to a more deep underlying theory in which vacuum is equipped with an additional “fine” structure. The vacuum in the induced gravity is a ground state of “heavy” constituents. “Light” particles are just low energy collective excitations over this vacuum. The bla ...
Section 14
... regularity. In 1967, when these objects were first discovered, this regularity was so incredible that it was initially thought the object could be a beacon left by an extraterrestrial civilization--the object found was initially denoted as "LGM-1", where the LGM stands for "Little Green Men". Black ...
... regularity. In 1967, when these objects were first discovered, this regularity was so incredible that it was initially thought the object could be a beacon left by an extraterrestrial civilization--the object found was initially denoted as "LGM-1", where the LGM stands for "Little Green Men". Black ...
sma_overview - Harvard-Smithsonian Center for Astrophysics
... – Solar System bodies, protoplanetary disks, star forming regions, evolved star envelopes, black holes, nearby galaxies, ultraluminous galaxies at cosmological distances, … ...
... – Solar System bodies, protoplanetary disks, star forming regions, evolved star envelopes, black holes, nearby galaxies, ultraluminous galaxies at cosmological distances, … ...
Today in Astronomy 102: observations of stellar
... The X-ray source has a stellar companion, a star rather similar to the Sun (about 1.1 M); the X-ray source and the visible star revolve around each other with a period of 2.92 days. Their distance from us is measured to be 6500 light years. A stroke of luck: it is an eclipsing system, so the or ...
... The X-ray source has a stellar companion, a star rather similar to the Sun (about 1.1 M); the X-ray source and the visible star revolve around each other with a period of 2.92 days. Their distance from us is measured to be 6500 light years. A stroke of luck: it is an eclipsing system, so the or ...
Hawking radiation
Hawking radiation is black body radiation that is predicted to be released by black holes, due to quantum effects near the event horizon. It is named after the physicist Stephen Hawking, who provided a theoretical argument for its existence in 1974, and sometimes also after Jacob Bekenstein, who predicted that black holes should have a finite, non-zero temperature and entropy.Hawking's work followed his visit to Moscow in 1973 where the Soviet scientists Yakov Zeldovich and Alexei Starobinsky showed him that, according to the quantum mechanical uncertainty principle, rotating black holes should create and emit particles. Hawking radiation reduces the mass and energy of black holes and is therefore also known as black hole evaporation. Because of this, black holes that lose more mass than they gain through other means are expected to shrink and ultimately vanish. Micro black holes are predicted to be larger net emitters of radiation than larger black holes and should shrink and dissipate faster.In September 2010, a signal that is closely related to black hole Hawking radiation (see analog gravity) was claimed to have been observed in a laboratory experiment involving optical light pulses. However, the results remain unverified and debatable. Other projects have been launched to look for this radiation within the framework of analog gravity. In June 2008, NASA launched the Fermi space telescope, which is searching for the terminal gamma-ray flashes expected from evaporating primordial black holes. In the event that speculative large extra dimension theories are correct, CERN's Large Hadron Collider may be able to create micro black holes and observe their evaporation.