Quasar - Study guides, Class notes & Summaries

How did Hubble classify galaxies? - -shape and structural properties -stellar content -gas and dust -star formation -stellar motion What are the different categories Hubble used to classified galaxies ? - Spirals, barred spirals, ellipticals, irregulars What are the characteristics of spiral galaxies? - -flattened galactic disk with spiral arms -central galactic bulge -extended halo of faint old stars -spirals are classified according to the size of the central bulge and tightness of...

Astronomy correct answers has had important practical applications including the development of Newtonian mechanics, on which much of modern technology is based The intellectual foundation of science is correct answers observation, logic, and skepticism The scientific method is a major force in science and has been developed to ensure that correct answers theories about physical phenomena agree with what we find in experiments and observations Forms of radiation which are not visible co...

PHSC 121 Hw 8 Exam Questions with Correct Answers A black hole is - Answer-b. a region in space where mass produces a gravity field so intense that neither matter nor light itself can escape Black holes are thought to be caused by - Answer-a. collapsing stars b. concentrated mass at the center of galaxies Black holes are theorized to be - Answer-b. at the center of galaxies c. at the center of quasars A quasar is - Answer-c. a large remote energy source which may contain a black ho...

A THEORY is a pattern in nature thought to have predictive power. The test of a theory is a prediction. That's where pseudo-science fails. T/F - Answer-T Red giant stars are powered by hydrogen burning in a shell surrounding a core, which has been depleted of hydrogen. T/F - Answer-T Jovian planets have densities similar to that of water, and we know in fact that they are mostly made of water. T/F - Answer-F - Jovian planets are gaseous The Sun appears to circle the Celestial Sphere in on...

ABCTE Elementary Education Exam 206 Questions with Verified Answers Magna Carta - CORRECT ANSWER (1215) a charter of liberties (freedoms) that King John "Lackland" of Englad was forced to sign; it made the king obey the same laws as the citizens of his kingdom 13th Ammendment - CORRECT ANSWER officially abolished slavery, prohibits involuntary servitude. Articles of Confederation - CORRECT ANSWER 1st Constitution of the U.S. (weaknesses-no executive, no judicial, no power to tax, n...

LUOA Earth Science Module 10 Questions and Answers Graded A+ Which type of star emits radio waves? Pulsars Dead stars are ________________ , and they no longer undergo nuclear fusion black dwarfs Stars that appear to pulsate but are non-pulsating are called ___________________. eclipsing binary stars Some stars expand and contract giving off varying intensities of brightness. These are _______________. pulsating stars Stars of average size and average temperature are called _______________. ...

Quasar Short for "quasi-stellar radio source," a bright, point-like object that produces the luminosity of 100 to 1,000 galaxies within a region the size of a solar system. Pulsar A rapidly rotating neutron star which emits radiation in magnetic pulses. Redshift A shift in the lines of an object's spectrum toward the red end. It indicates that an object is moving away from the observer. The larger it is, the faster the object is moving. Asterism A cluster of stars (or a small constel...

PHSC 121 HW 8 Review Practice Test 2024. A black hole is - CORRECT ANSWER b. a region in space where mass produces a gravity field so intense that neither matter nor light itself can escape Black hols are thought to be caused by - CORRECT ANSWER a. collapsing stars b. concentrated mass at the center of galaxies Black holes are theorized to be - CORRECT ANSWER b. at the center of galaxies c. at the center of quasars A quasar is - CORRECT ANSWER c. a large remote energy source whic...

The radio lobes that flank some radio galaxies produce mainly - synchrotron radiation. The fact that many radio lobes emit more intensely from the side away from the galaxy suggests that - they are created by jets from the galaxy. The central galaxy in a double-lobed radio source is usually - a giant elliptical galaxy. The hot gas of a radio lobe could be held together by - collision with the intergalactic medium. Head-tail galaxies are - a, b and c. If the red shifts of quasars arise f...

PHSC 121 Liberty University Exam 3 Questions With All Complete Answers We have seasons because - Answer -the earth's axis of rotation is tilted 23.5 degrees relative to the ecliptic Which of the following is true of the vernal equinox - Answer -the Sun is now crossing the equator into the northern hemisphere and the northern hemisphere begins to face toward the Sun For someone standing on the Tropic of Cancer, the sun will appear at the observer's zenith ___________ each year and at t...