Physics

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Population I stars are younger than Population II stars. a. True b. False Indicate whether the ... Started by mspears3	1 Replies 96 Views	Jul 27, 2018 by nathang24
William and Caroline Herschel's map included four of the following hypotheses in their model of the ... Started by Capo	1 Replies 90 Views	Jul 27, 2018 by Fayaz00962
What property of a Cepheid variable can you determine if you know its period? a. surface ... Started by lidoalex	1 Replies 151 Views	Jul 27, 2018 by nickk12214
Harlow Shapley made the first accurate determination of the position of the center of the galaxy by ... Started by berenicecastro	3 Replies 87 Views	Jul 27, 2018 by bfulkerson77
Based on Shapley's determination of the center of the galaxy, the Sun is located ____. a. in the ... Started by fasfsadfdsfa	1 Replies 54 Views	Jul 27, 2018 by k.lashomb
____ are crucial in determining the distance to objects that are far away, but still in the Milky ... Started by Evvie72	1 Replies 74 Views	Jul 27, 2018 by ambernicolefink
Which object would be absent in the galactic halo? a. emission nebulae. b. old main sequence ... Started by karlynnae	1 Replies 91 Views	Jul 27, 2018 by millet
The Sun orbits the center of the galaxy about once every ____. a. 200,000 years b. 2,000,000 ... Started by acc299	3 Replies 37 Views	Jul 27, 2018 by amcvicar
A group of one hundred to a few thousand stars in a region of 25 pc in diameter that were created at ... Started by KimWrice	1 Replies 55 Views	Jul 27, 2018 by bubulittle310@msn.cn
In which area of the galaxy would you find stars with fairly circular orbits about the galactic ... Started by craiczarry	1 Replies 65 Views	Jul 27, 2018 by Tonyam972
Dark matter is ___. a. a cloud of black holes and brown dwarfs in the galactic halo b. extremely ... Started by jCorn1234	1 Replies 76 Views	Jul 27, 2018 by Sweetkitty24130
Almost all of the gas and dust in the Milky Way is located in the ____. a. halo b. central bulge ... Started by nenivikky	3 Replies 96 Views	Jul 27, 2018 by Athena23
The mass of the Milky Way galaxy is a few ____. a. million solar masses b. hundreds of millions ... Started by urbanoutfitters	1 Replies 75 Views	Jul 27, 2018 by shoemake
The following objects are found in a spiral arm of a galaxy. Which is the exception? a. ... Started by stock	1 Replies 34 Views	Jul 27, 2018 by iceage
O stars must be formed in spiral arms because _____. a. they do not live long enough to move out ... Started by joe	1 Replies 81 Views	Jul 27, 2018 by komodo7
When you plot the position of sun-like stars, you will find that ___. a. almost all sun-like ... Started by Evvie72	3 Replies 46 Views	Jul 27, 2018 by dellikani2015
Which of the following would be the closest estimate to the number of times the Sun has orbited the ... Started by Ebrown	1 Replies 35 Views	Jul 27, 2018 by xiaomengxian
Spurs are probably the result of ____. a. self-sustaining star formation b. spiral density waves ... Started by tiffannnnyyyyyy	1 Replies 79 Views	Jul 27, 2018 by Carissamariew
Why is it surprising that spiral arms are stable structures, lasting billions of years? a. ... Started by codyclark	1 Replies 51 Views	Jul 27, 2018 by jaymee143
Spiral density wave theory and self-sustaining star formation are ways to explain why ____. a. ... Started by V@ndy87	3 Replies 68 Views	Jul 27, 2018 by nekcihc358
Spiral arms are obviouseasily-seen featuresbecause they contain ____. a. dense molecular clouds ... Started by Zulu123	1 Replies 121 Views	Jul 27, 2018 by 234sdffa
The center of the Milky Way galaxy is in the direction of the constellation ____. a. Sagittarius ... Started by KimWrice	1 Replies 79 Views	Jul 27, 2018 by courtney_bruh
The center of our galaxy contains a very intense source of radio and X-ray radiation named Sgr A. ... Started by chandani	1 Replies 108 Views	Jul 27, 2018 by vseab
Why is it so difficult to study the center of our galaxy? a. Light from the center is lost in the ... Started by frankwu	3 Replies 139 Views	Jul 27, 2018 by aprice35067
At the center of our galaxy, ____. a. material is available to make stars but the region is too ... Started by joesmith1212	1 Replies 64 Views	Jul 27, 2018 by cclemon1