Physics

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A(n) ____________________ periodically emits large amounts of X-ray radiation as material accretes ... Started by sdfghj	1 Replies 57 Views	Jul 27, 2018 by Kjones0604
Both optical and radio telescopes can suffer from light pollution. a. True b. False Indicate ... Started by karen	1 Replies 82 Views	Jul 27, 2018 by Juro
The densest stars in the H-R diagram are the white dwarfs. a. True b. False Indicate whether ... Started by tnt_battle	3 Replies 197 Views	Jul 27, 2018 by leahchrapun
Gamma-ray bursts lasting longer than two seconds appear to be related to ______________. Fill in ... Started by wrbasek0	1 Replies 76 Views	Jul 27, 2018 by vickybb89
Why are nearly all recently built astronomical telescopes reflectors instead of refractors? What ... Started by aabwk4	1 Replies 125 Views	Jul 27, 2018 by nekcihc358
On the H-R diagram, lines of constant radius slants down from left to right. a. True b. False ... Started by clippers!	1 Replies 67 Views	Jul 27, 2018 by InfiniteSteez
An object of zero radius is known as a __________________. Fill in the blank(s) with correct ... Started by Davideckstein7	3 Replies 88 Views	Jul 27, 2018 by maaaaaaaaaa
What advantages does a large-diameter astronomical telescope have over a telescope of a smaller ... Started by Jkov05	1 Replies 125 Views	Jul 27, 2018 by SVictor
The Lyman series lines of hydrogen all lie in the infrared. a. True b. False Indicate whether ... Started by james0929	1 Replies 66 Views	Jul 27, 2018 by ryhom
Energy lost by an isolated pulsar is carried away by a _____________. Fill in the blank(s) with ... Started by Evvie72	1 Replies 74 Views	Jul 27, 2018 by Jevvish
Why were telescopes with very large, thin mirrors not built 50 years ago? What will be an ideal ... Started by londonang	3 Replies 177 Views	Jul 27, 2018 by Kimmy
Hydrogen lines are weak in the spectra of hot stars because many of the hydrogen atoms have their ... Started by rlane42	1 Replies 248 Views	Jul 27, 2018 by Pswine
Neutron stars were first discovered in the 1930's. a. True b. False Indicate whether the ... Started by tth	1 Replies 97 Views	Jul 27, 2018 by enass
How does the nature of radio waves allow a radio telescope to use a wire mesh surface? What will ... Started by Mr.Thesaxman	1 Replies 113 Views	Jul 27, 2018 by Pswine
White dwarfs are dense, cool, and dim. a. True b. False Indicate whether the statement is true ... Started by future617RT	3 Replies 101 Views	Jul 27, 2018 by akemokai
We expect neutron stars to spin rapidly because they conserve angular momentum. a. True b. False ... Started by jparksx	1 Replies 101 Views	Jul 27, 2018 by memslove
List the advantages the Hubble Space Telescope has over ground-based telescopes. What will be an ... Started by kshipps	1 Replies 94 Views	Jul 27, 2018 by helenmarkerine
The mass-luminosity relation applies to both white dwarfs and main-sequence stars as both trace ... Started by strangeaffliction	1 Replies 127 Views	Jul 27, 2018 by fdliggud
The event horizon marks the boundary within which the density is roughly the same as that of the ... Started by APUS57	3 Replies 72 Views	Jul 27, 2018 by kjohnson
Explain why the majority of large modern telescopes are not refractors. What will be an ideal ... Started by ss2343	1 Replies 103 Views	Jul 27, 2018 by bulacsom
The larger variation in brightness of a partially eclipsing system consisting of a B2 main-sequence ... Started by tth	1 Replies 111 Views	Jul 27, 2018 by welcom1000
If the accretion disk around a black hole emits X-rays outside the event horizon, the X-rays can ... Started by bio_gurl	1 Replies 105 Views	Jul 27, 2018 by Animal_Goddess
What are sources of light pollution and how do those affect astronomical observations? What will ... Started by savannahhooper	3 Replies 61 Views	Jul 27, 2018 by kingfahad97
Stellar parallax is used to measure distances of celestial bodies within the solar system. a. ... Started by nelaaney	1 Replies 63 Views	Jul 27, 2018 by lcapri7
LMC X-3 is a binary system that is believed to contain a black hole. a. True b. False Indicate ... Started by abarnes	1 Replies 79 Views	Jul 27, 2018 by micaelaswann