Physics

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From a distance of 1 AU, the gravity of a three-solar-mass star is ________ the gravity of a ... Started by karateprodigy	1 Replies 130 Views	Jul 27, 2018 by bdobbins
Which of the following processes slowed the collapse of protogalactic clouds? A) the conversion ... Started by Collmarie	1 Replies 68 Views	Jul 27, 2018 by welcom1000
When light escapes from near a black hole, we see a(n) ________ redshift. Fill in the blank(s) ... Started by tfester	1 Replies 187 Views	Jul 27, 2018 by ong527
Which of the following types of protogalactic clouds is most likely to form an elliptical galaxy? ... Started by justinmsk	3 Replies 104 Views	Jul 27, 2018 by Galvarado142
No evidence of impact craters has been found on Venus. Indicate whether the statement is true or ... Started by gonzo233	1 Replies 57 Views	Jul 27, 2018 by macagn
The surface of Mars is surprisingly smooth and featureless. Indicate whether the statement is ... Started by CQXA	1 Replies 41 Views	Jul 27, 2018 by Dnite
Like radio and optical astronomy, infrared astronomy is easily done with ground-based telescopes. ... Started by ss2343	1 Replies 69 Views	Jul 27, 2018 by Pswine
Mars has larger volcanoes than Earth's Hawaii. Indicate whether the statement is true or ... Started by ghost!	3 Replies 121 Views	Jul 27, 2018 by Kdiggy
Hydrogen lines are weak in M class stars because they have much less of it than do A class stars. ... Started by colton	1 Replies 99 Views	Jul 27, 2018 by CharlieArnold
The mirrors for X-ray telescopes are the same shape as those of optical reflectors. Indicate ... Started by Jipu 123	1 Replies 72 Views	Jul 27, 2018 by lolol
Ionized helium lines are found in both type B and O stars. Indicate whether the statement is true ... Started by LaDunn	1 Replies 73 Views	Jul 27, 2018 by Jsherida
Which of the following cannot be true of the very first stars formed in the universe? A) Some may ... Started by stock	3 Replies 77 Views	Jul 27, 2018 by wfdfwc23
The Compton GRO was the first telescope used for our exploration of high-energy astronomy. ... Started by DelorasTo	1 Replies 40 Views	Jul 27, 2018 by Brummell1998
If we represent the Milky Way Galaxy as the size of a grapefruit, the distance to the Andromeda ... Started by Medesa	1 Replies 99 Views	Jul 27, 2018 by chreslie
Molecular lines, such as TiO, are only found in very hot stars. Indicate whether the statement is ... Started by geodog55	1 Replies 69 Views	Jul 27, 2018 by kmb352
Galaxies look the same whether viewed in visible or X-ray wavelengths. Indicate whether the ... Started by ssal	3 Replies 85 Views	Jul 27, 2018 by Leostella20
A star of the same diameter, but twice as hot as our Sun, must be 16 times more luminous. ... Started by tatyanajohnson	1 Replies 97 Views	Jul 27, 2018 by Tabitha_2016
The primary factor for galactic evolution is ________. Fill in the blank(s) with correct ... Started by CQXA	1 Replies 132 Views	Jul 27, 2018 by Sierray
Geminga pulses strongly in gamma rays, and may be the closest neutron star. Why is it unusual? ... Started by armygirl	1 Replies 90 Views	Jul 27, 2018 by johnharpe
There is new evidence that water has flowed as mud on Mars in recent times. Indicate whether the ... Started by dalyningkenk	3 Replies 110 Views	Jul 27, 2018 by amit
Almost all stars on the main sequence range from 1 to 10 solar luminosities. Indicate whether the ... Started by bobbysung	1 Replies 80 Views	Jul 27, 2018 by mbcrismon
The absorption or accretion of smaller galaxies into larger ones is called ________. Fill in the ... Started by jhjkgdfhk	1 Replies 78 Views	Jul 27, 2018 by guyanai
What problem do refractor telescopes have that reflectors don't? A) chromatic aberration B) ... Started by EAugust	1 Replies 90 Views	Jul 27, 2018 by blakcmamba
Giant elliptical galaxies may be the result of ________ in the centers of rich clusters. Fill in ... Started by Pineappleeh	3 Replies 77 Views	Jul 27, 2018 by akemokai
The most important advantage of CCDs over film is that A) they can cover larger areas of the sky ... Started by CQXA	1 Replies 59 Views	Jul 27, 2018 by verrinzo