Lab 1-2 : Vocabulary
... Observation-the act of using the five senses to gather information. Inference- a possible explanation or solution to a problem based on observations. ...
... Observation-the act of using the five senses to gather information. Inference- a possible explanation or solution to a problem based on observations. ...
1)2 A light year is a) about six trillion miles. b) the distance to the star
... within the atoms and the e crammed into the p making neutrons that are packed as close as possible. One ns is the pulsar in the Crab Nebula in Taurus. c) black hole. ...
... within the atoms and the e crammed into the p making neutrons that are packed as close as possible. One ns is the pulsar in the Crab Nebula in Taurus. c) black hole. ...
Stars
... seen from Earth Absolute magnitude: brightness if it were a standard distance from Earth ...
... seen from Earth Absolute magnitude: brightness if it were a standard distance from Earth ...
Practice Homework 2: Properties of Stars 1. Star A is 100 times more
... 6. The Light in sun is created in the interior of the sun which is extremely hot and dense while the outer layers are relatively colder. What kind of spectrum it should produce? Helium in the sun causes absorption at certain frequencies, in which regions of sun do you think this mostly occurs? 7. Th ...
... 6. The Light in sun is created in the interior of the sun which is extremely hot and dense while the outer layers are relatively colder. What kind of spectrum it should produce? Helium in the sun causes absorption at certain frequencies, in which regions of sun do you think this mostly occurs? 7. Th ...
Chapter 27.2
... • For medium-sized stars, after helium fusion, the giant stage is over. • Outer gasses are lost, and a core is revealed, which heats and illuminates the expanding gasses, forming a planetary ...
... • For medium-sized stars, after helium fusion, the giant stage is over. • Outer gasses are lost, and a core is revealed, which heats and illuminates the expanding gasses, forming a planetary ...
Lec 25.2- STELLAR EVOLUTION SUMMARY
... A supernova explosion fills vast regions of space with matter which may radiate energy (including visible light) for hundreds and even thousands of year. An example of the remnant of a supernova explosion is the Crab Nebula, mentioned in Pulsars, below. The material expelled by a supernova may recon ...
... A supernova explosion fills vast regions of space with matter which may radiate energy (including visible light) for hundreds and even thousands of year. An example of the remnant of a supernova explosion is the Crab Nebula, mentioned in Pulsars, below. The material expelled by a supernova may recon ...
The Effects of Gravity
... then crushing electrons into protons to create neutrons. These neutron stars are also called “pulsars” because they release light energy as radio waves, sending “mysterious” signals. ...
... then crushing electrons into protons to create neutrons. These neutron stars are also called “pulsars” because they release light energy as radio waves, sending “mysterious” signals. ...
X-ray Astronomy
... • Soft X-rays are emitted by hot gas (T ~ 2-3 MK) in the interior of the superbubble. This bright object forms the background for the "shadow" of a filament of gas and dust. The filament is shown by the overlaid contours, which represent 100 micron emission from dust at a temperature of about 30 K a ...
... • Soft X-rays are emitted by hot gas (T ~ 2-3 MK) in the interior of the superbubble. This bright object forms the background for the "shadow" of a filament of gas and dust. The filament is shown by the overlaid contours, which represent 100 micron emission from dust at a temperature of about 30 K a ...
Life Cycle of the Stars
... • When the core of the matter becomes hot enough, thermonuclear fusion begins. • This means that there is enough heat to turn hydrogen to helium. • Once this has happened a true star has been born. • The star shines with its own light. • A solar wind then blows away the rest of the dust and gas. ...
... • When the core of the matter becomes hot enough, thermonuclear fusion begins. • This means that there is enough heat to turn hydrogen to helium. • Once this has happened a true star has been born. • The star shines with its own light. • A solar wind then blows away the rest of the dust and gas. ...
Black holes - schoolphysics
... second 10 000 km above the surface this will have fallen to just under 7 km per second. Clearly for a Black Hole there will be a distance from the centre of the Black hole where its escape velocity will be equal to that of light – closer you fall in and can never escape, beyond that distance you cou ...
... second 10 000 km above the surface this will have fallen to just under 7 km per second. Clearly for a Black Hole there will be a distance from the centre of the Black hole where its escape velocity will be equal to that of light – closer you fall in and can never escape, beyond that distance you cou ...
Black Holes and Cosmic Roles: Understanding the Center of the
... • Spacetime: The coupling of time and the three spatial dimensions with time acting as the fourth dimension. • Gravitational Lensing: The apparent bending of light from a distant source due to the matter, especially the galaxies, groups of or clusters of galaxies that surround the light source. It i ...
... • Spacetime: The coupling of time and the three spatial dimensions with time acting as the fourth dimension. • Gravitational Lensing: The apparent bending of light from a distant source due to the matter, especially the galaxies, groups of or clusters of galaxies that surround the light source. It i ...
August Evening Skies
... first magnitude or brighter are visible. In order of brightness they are: Jupiter, Arcturus, Vega, Altair, Antares, Spica, and Deneb. In addition to stars, other objects that should be visible to the unaided eye are labeled on the map. The double star (Dbl) at the bend of the handle of the Big Dippe ...
... first magnitude or brighter are visible. In order of brightness they are: Jupiter, Arcturus, Vega, Altair, Antares, Spica, and Deneb. In addition to stars, other objects that should be visible to the unaided eye are labeled on the map. The double star (Dbl) at the bend of the handle of the Big Dippe ...
glossary - Discovery Education
... black hole — the theoretical remains of a supermassive star that has exploded and collapsed in on itself. No light can escape from a black hole because its gravity is so strong. brown dwarf — a starlike object that does not radiate energy because it has insufficient mass for nuclear fusion. constell ...
... black hole — the theoretical remains of a supermassive star that has exploded and collapsed in on itself. No light can escape from a black hole because its gravity is so strong. brown dwarf — a starlike object that does not radiate energy because it has insufficient mass for nuclear fusion. constell ...
Life Cycle of a Star
... the size of the star whether it is smaller then our sun, the same size or larger then our sun ...
... the size of the star whether it is smaller then our sun, the same size or larger then our sun ...
19Nov_2014
... electrons merge into neutrons, taking energy away from the core • The core collapses, and the layers above fall rapidly toward the center, where they collide with the core material and “bounce” • The “bounced material collides with the remaining infalling gas, raising temperatures high enough to set ...
... electrons merge into neutrons, taking energy away from the core • The core collapses, and the layers above fall rapidly toward the center, where they collide with the core material and “bounce” • The “bounced material collides with the remaining infalling gas, raising temperatures high enough to set ...
Astro 18 – Section Week 2
... The deeper absorption line at 760nm is caused by our atmosphere's oxygen molecule. The two absorption lines at 720 and 890nm (from methane) appear on Saturn and Titan, but the rings do not have them ...
... The deeper absorption line at 760nm is caused by our atmosphere's oxygen molecule. The two absorption lines at 720 and 890nm (from methane) appear on Saturn and Titan, but the rings do not have them ...
Astro 18 – Section Week 2
... The deeper absorption line at 760nm is caused by our atmosphere's oxygen molecule. The two absorption lines at 720 and 890nm (from methane) appear on Saturn and Titan, but the rings do not have them ...
... The deeper absorption line at 760nm is caused by our atmosphere's oxygen molecule. The two absorption lines at 720 and 890nm (from methane) appear on Saturn and Titan, but the rings do not have them ...
The Hertzsprung – Russell Diagram
... Upper left – blue/blue-white, large mass, bright, hot Lower right – red, small, dim, cool Sun is located in the middle of the main sequence ...
... Upper left – blue/blue-white, large mass, bright, hot Lower right – red, small, dim, cool Sun is located in the middle of the main sequence ...
doc
... (Note: No such stars actually exist - even the hottest (non-whitedwarf) stars are only about 6-7 times the Sun's temperature, and these are all somewhat larger than the Sun. This is just an exercise.) Supernovae / Stellar remnants / black holes ...
... (Note: No such stars actually exist - even the hottest (non-whitedwarf) stars are only about 6-7 times the Sun's temperature, and these are all somewhat larger than the Sun. This is just an exercise.) Supernovae / Stellar remnants / black holes ...
Stellar Remnants White Dwarfs, Neutron Stars & Black Holes
... • These are very small, dense objects. • They exist in states of matter not seen anywhere on Earth. They do not behave like normal solids, liquids or gases. • They often have very strong magnetic fields and very rapid spin rates. ...
... • These are very small, dense objects. • They exist in states of matter not seen anywhere on Earth. They do not behave like normal solids, liquids or gases. • They often have very strong magnetic fields and very rapid spin rates. ...
except
... that is inside the event horizon of a black hole is lost, except mass charge angular momentum ...
... that is inside the event horizon of a black hole is lost, except mass charge angular momentum ...
Neutron Star
... neutron star. – Very hot: 200 billion K – Very small: 10 - 30 km, the size of De Kalb county – Very dense: 100 million tons per cm3 ...
... neutron star. – Very hot: 200 billion K – Very small: 10 - 30 km, the size of De Kalb county – Very dense: 100 million tons per cm3 ...
Cygnus X-1
Cygnus X-1 (abbreviated Cyg X-1) is a well-known galactic X-ray source, thought to be a black hole, in the constellation Cygnus. It was discovered in 1964 during a rocket flight and is one of the strongest X-ray sources seen from Earth, producing a peak X-ray flux density of 6977229999999999999♠2.3×10−23 Wm−2 Hz−1 (7003230000000000000♠2.3×103 Jansky). Cygnus X-1 was the first X-ray source widely accepted to be a black hole and it remains among the most studied astronomical objects in its class. The compact object is now estimated to have a mass about 14.8 times the mass of the Sun and has been shown to be too small to be any known kind of normal star, or other likely object besides a black hole. If so, the radius of its event horizon is about 7004440000000000000♠44 km.Cygnus X-1 belongs to a high-mass X-ray binary system about 7019574266339685654♠6070 ly from the Sun that includes a blue supergiant variable star designated HDE 226868 which it orbits at about 0.2 AU, or 20% of the distance from the Earth to the Sun. A stellar wind from the star provides material for an accretion disk around the X-ray source. Matter in the inner disk is heated to millions of degrees, generating the observed X-rays. A pair of jets, arranged perpendicular to the disk, are carrying part of the energy of the infalling material away into interstellar space.This system may belong to a stellar association called Cygnus OB3, which would mean that Cygnus X-1 is about five million years old and formed from a progenitor star that had more than 7001400000000000000♠40 solar masses. The majority of the star's mass was shed, most likely as a stellar wind. If this star had then exploded as a supernova, the resulting force would most likely have ejected the remnant from the system. Hence the star may have instead collapsed directly into a black hole.Cygnus X-1 was the subject of a friendly scientific wager between physicists Stephen Hawking and Kip Thorne in 1975, with Hawking betting that it was not a black hole. He conceded the bet in 1990 after observational data had strengthened the case that there was indeed a black hole in the system. This hypothesis has not been confirmed due to a lack of direct observation but has generally been accepted from indirect evidence.