Earth Science 11 Chapter 28 Answers: 28.1 1. All are forms of
... 10. A neutron star is the remnant of massive star that had become a supernova; a main-sequence star is actively fusing hydrogen into helium. 11. An emission spectrum shows the wavelengths of visible light that a glowing gas emits; an absorption spectrum shows which wavelengths of visible light a coo ...
... 10. A neutron star is the remnant of massive star that had become a supernova; a main-sequence star is actively fusing hydrogen into helium. 11. An emission spectrum shows the wavelengths of visible light that a glowing gas emits; an absorption spectrum shows which wavelengths of visible light a coo ...
Stellar Remnants - Sierra College Astronomy Home Page
... Earth’s), and a teaspoon of white dwarf material would weigh 2 tons. ...
... Earth’s), and a teaspoon of white dwarf material would weigh 2 tons. ...
Astr40 HWIII(new) - Empyrean Quest Publishers
... 4. Stars with lower mass have shorter lifetimes. (T or F) 5. A low mass star which finishes fusing all the H to He in its core, leaves the main sequence ...
... 4. Stars with lower mass have shorter lifetimes. (T or F) 5. A low mass star which finishes fusing all the H to He in its core, leaves the main sequence ...
Galaxies - C. Levesque
... • Our star is now in what is called the main sequence where it is stable and consistent. • A cooler smaller star like our sun can last ...
... • Our star is now in what is called the main sequence where it is stable and consistent. • A cooler smaller star like our sun can last ...
Answer Key
... justifications must be in your own words. If you are unsure about a question, make an educated guess, and justify your guess (which can include why you can rule out certain choices from the list). If you get stuck, please seek assistance from your peers, the TA, or the professor. Note: It may be hel ...
... justifications must be in your own words. If you are unsure about a question, make an educated guess, and justify your guess (which can include why you can rule out certain choices from the list). If you get stuck, please seek assistance from your peers, the TA, or the professor. Note: It may be hel ...
The Universe and Galaxies - West Jefferson Local Schools
... - Dark energy – theoretical energy that might be causing accelerated expansion of the universe ...
... - Dark energy – theoretical energy that might be causing accelerated expansion of the universe ...
What have we learned?
... become hot enough to produce X rays, making the system an X-ray binary. – Sudden fusion events periodically occur on a the surface of an accreting neutron star, producing X-ray bursts. ...
... become hot enough to produce X rays, making the system an X-ray binary. – Sudden fusion events periodically occur on a the surface of an accreting neutron star, producing X-ray bursts. ...
Watching Galaxies Form Near the Beginning of Time
... The finite speed of light means that we always see things after they have happened–a delay of 8 minutes for the Sun and about 12 billion years for the most distant galaxies we can observe. In other words, ...
... The finite speed of light means that we always see things after they have happened–a delay of 8 minutes for the Sun and about 12 billion years for the most distant galaxies we can observe. In other words, ...
Stars and Universe Test Review - Garnet Valley School District
... 1. __________________________ large, glowing spheres of gas that generate light through nuclear fusion in their cores 2. __________________________ hot, very dense, Earth-sized stars 3. __________________________ matter that does not give off electromagnetic radiation 4. __________________________ a ...
... 1. __________________________ large, glowing spheres of gas that generate light through nuclear fusion in their cores 2. __________________________ hot, very dense, Earth-sized stars 3. __________________________ matter that does not give off electromagnetic radiation 4. __________________________ a ...
Name
... 33) Which is not a reason why all large modern telescopes tend to be reflectors? A) It is much easier to make a high-quality mirror than the same quality lens B) Large mirrors are much lighter than large lenses C) Lenses focus different wavelengths of light slightly differently. Mirrors do not have ...
... 33) Which is not a reason why all large modern telescopes tend to be reflectors? A) It is much easier to make a high-quality mirror than the same quality lens B) Large mirrors are much lighter than large lenses C) Lenses focus different wavelengths of light slightly differently. Mirrors do not have ...
Name
... 33) Which is not a reason why all large modern telescopes tend to be reflectors? A) It is much easier to make a high-quality mirror than the same quality lens B) Large mirrors are much lighter than large lenses C) Lenses focus different wavelengths of light slightly differently. Mirrors do not have ...
... 33) Which is not a reason why all large modern telescopes tend to be reflectors? A) It is much easier to make a high-quality mirror than the same quality lens B) Large mirrors are much lighter than large lenses C) Lenses focus different wavelengths of light slightly differently. Mirrors do not have ...
Name
... 33) Which is not a reason why all large modern telescopes tend to be reflectors? A) It is much easier to make a high-quality mirror than the same quality lens B) Large mirrors are much lighter than large lenses C) Lenses focus different wavelengths of light slightly differently. Mirrors do not have ...
... 33) Which is not a reason why all large modern telescopes tend to be reflectors? A) It is much easier to make a high-quality mirror than the same quality lens B) Large mirrors are much lighter than large lenses C) Lenses focus different wavelengths of light slightly differently. Mirrors do not have ...
Document
... Blazars are powerful gamma-ray sources. The most powerful of them have equivalent isotropic luminosity 1049 erg/s. Collimation θ2/2 ~ 10-2 – 10-3. θ – jet opening angle. EGRET detected 66 (+27) sources of this type. New breakthrough is expected after the launch of GLAST. Several sources have been de ...
... Blazars are powerful gamma-ray sources. The most powerful of them have equivalent isotropic luminosity 1049 erg/s. Collimation θ2/2 ~ 10-2 – 10-3. θ – jet opening angle. EGRET detected 66 (+27) sources of this type. New breakthrough is expected after the launch of GLAST. Several sources have been de ...
Stars - Robert M. Hazen
... UNIV 301 Great Idea: The Sun and other stars use nuclear fusion reactions to convert mass into energy. Eventually, when a star’s nuclear fuel is depleted, the star must burn out. ...
... UNIV 301 Great Idea: The Sun and other stars use nuclear fusion reactions to convert mass into energy. Eventually, when a star’s nuclear fuel is depleted, the star must burn out. ...
Stellar Evolution
... Ring due to SN ejecta catching up with preSN stellar wind; also observable in X-rays. ...
... Ring due to SN ejecta catching up with preSN stellar wind; also observable in X-rays. ...
Name - MIT
... A) The rate that visible light from the Sun is being absorbed by the Earth’s atmosphere B) The rate that hydrogen is being fused into helium in the Sun C) The rate that gamma rays are hitting the Earth’s atmosphere D) The rate that white dwarfs are being formed in the galaxy E) The rate that stars f ...
... A) The rate that visible light from the Sun is being absorbed by the Earth’s atmosphere B) The rate that hydrogen is being fused into helium in the Sun C) The rate that gamma rays are hitting the Earth’s atmosphere D) The rate that white dwarfs are being formed in the galaxy E) The rate that stars f ...
Lecture 17, PPT version
... light, inherently rare for them to be emitted by astronomical objects Bursts discovered in early 1960’s, randomly distributed around the sky, a few per week, may have complex light curves, but they don’t repeat ...
... light, inherently rare for them to be emitted by astronomical objects Bursts discovered in early 1960’s, randomly distributed around the sky, a few per week, may have complex light curves, but they don’t repeat ...
Name - MIT
... A) It is the world's largest operating telescope. B) It refers to any kind of instrument that can be hooked up to a telescope. C) It is an electronic detector that can be used in place of photographic film for taking images of the sky. D) It is a unit used by astronomers to measure angular resolutio ...
... A) It is the world's largest operating telescope. B) It refers to any kind of instrument that can be hooked up to a telescope. C) It is an electronic detector that can be used in place of photographic film for taking images of the sky. D) It is a unit used by astronomers to measure angular resolutio ...
Which of the following is the best description of an Sc galaxy? A) a
... The Virgo Cluster of galaxies is receding from us at about 1500 km/sec. How does its distance compare with the diameter of the Milky Way galaxy? A) its distance is about ten times the diameter of the Milky Way B) its distance is about 50 times the diameter of the Milky Way C) its distance is about 5 ...
... The Virgo Cluster of galaxies is receding from us at about 1500 km/sec. How does its distance compare with the diameter of the Milky Way galaxy? A) its distance is about ten times the diameter of the Milky Way B) its distance is about 50 times the diameter of the Milky Way C) its distance is about 5 ...
How Far Can You See?
... probable limit for the farthest observable star, it’s hardly the outer limit for our eyes. Galaxies are sometimes called “island universes” since they are vast collections of stars, gas, and dust. Our Milky Way is a good example, boasting hundreds of billions of stars in a spiral-spangled disk rough ...
... probable limit for the farthest observable star, it’s hardly the outer limit for our eyes. Galaxies are sometimes called “island universes” since they are vast collections of stars, gas, and dust. Our Milky Way is a good example, boasting hundreds of billions of stars in a spiral-spangled disk rough ...
Gamma-ray burst
Gamma-ray bursts (GRBs) are flashes of gamma rays associated with extremely energetic explosions that have been observed in distant galaxies. They are the brightest electromagnetic events known to occur in the universe. Bursts can last from ten milliseconds to several hours. The initial burst is usually followed by a longer-lived ""afterglow"" emitted at longer wavelengths (X-ray, ultraviolet, optical, infrared, microwave and radio).Most observed GRBs are believed to consist of a narrow beam of intense radiation released during a supernova or hypernova as a rapidly rotating, high-mass star collapses to form a neutron star, quark star, or black hole. A subclass of GRBs (the ""short"" bursts) appear to originate from a different process – this may be due to the merger of binary neutron stars. The cause of the precursor burst observed in some of these short events may be due to the development of a resonance between the crust and core of such stars as a result of the massive tidal forces experienced in the seconds leading up to their collision, causing the entire crust of the star to shatter.The sources of most GRBs are billions of light years away from Earth, implying that the explosions are both extremely energetic (a typical burst releases as much energy in a few seconds as the Sun will in its entire 10-billion-year lifetime) and extremely rare (a few per galaxy per million years). All observed GRBs have originated from outside the Milky Way galaxy, although a related class of phenomena, soft gamma repeater flares, are associated with magnetars within the Milky Way. It has been hypothesized that a gamma-ray burst in the Milky Way, pointing directly towards the Earth, could cause a mass extinction event.GRBs were first detected in 1967 by the Vela satellites, a series of satellites designed to detect covert nuclear weapons tests. Hundreds of theoretical models were proposed to explain these bursts in the years following their discovery, such as collisions between comets and neutron stars. Little information was available to verify these models until the 1997 detection of the first X-ray and optical afterglows and direct measurement of their redshifts using optical spectroscopy, and thus their distances and energy outputs. These discoveries, and subsequent studies of the galaxies and supernovae associated with the bursts, clarified the distance and luminosity of GRBs. These facts definitively placed them in distant galaxies and also connected long GRBs with the explosion of massive stars, the only possible source for the energy outputs observed.