Physics

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Most molecules found in the interstellar medium are based on carbon. Indicate whether the ... Started by neverstopbelieb	1 Replies 79 Views	Jul 27, 2018 by ky860224
We usually find dark molecular clouds beside bright emission nebulae. Indicate whether the ... Started by vicky	1 Replies 83 Views	Jul 27, 2018 by kalskdjl1212
There is less ammonia in the atmospheres of Uranus and Neptune than in Jupiter or Saturn. ... Started by tatyanajohnson	3 Replies 170 Views	Jul 27, 2018 by heinisk01
The spiral arms are made of bright stars belonging to Population ________. Fill in the blank(s) ... Started by abc	1 Replies 156 Views	Jul 27, 2018 by Jane
The universe's density, compared to the critical density, determines the ________ of space. Fill ... Started by craiczarry	1 Replies 105 Views	Jul 27, 2018 by k.lashomb
Molecular clouds are much warmer than typical interstellar gas clouds. Indicate whether the ... Started by Caiter2013	1 Replies 172 Views	Jul 27, 2018 by Liamb2179
While ionized hydrogen glows bright red, neutral hydrogen is transparent visibly and best studied ... Started by jerry coleman	3 Replies 179 Views	Jul 27, 2018 by AaaA
The age of the whole Galaxy has been found from studies of its oldest stars in the ________ clusters ... Started by jhjkgdfhk	1 Replies 96 Views	Jul 27, 2018 by sultansheikh
The Galactic Disk has been flattened by the ________ of the Galaxy. Fill in the blank(s) with ... Started by james0929	1 Replies 91 Views	Jul 27, 2018 by emily12345
Conditions inside the darkest, densest nebulae are best studied with radio emission from molecules. ... Started by dejastew	1 Replies 54 Views	Jul 27, 2018 by karlss
Einstein's ________ constant has been revived to help us explain dark energy. Fill in the ... Started by craiczarry	3 Replies 43 Views	Jul 27, 2018 by ryansturges
Dark nebulae are opaque to all wavelengths of electromagnetic radiation. Indicate whether the ... Started by vicky	1 Replies 74 Views	Jul 27, 2018 by zacnyjessica
The inclusion of all known dark matter still increased the density to only ________ of the critical ... Started by daltonest1984	1 Replies 48 Views	Jul 27, 2018 by stano32
21-cm radiation is a result of an electron in hydrogen flipping its spin direction. Indicate ... Started by skymedlock	1 Replies 89 Views	Jul 27, 2018 by Zebsrer
If o is exactly one, then the geometry of the universe is ________. Fill in the blank(s) with ... Started by drink	3 Replies 87 Views	Jul 27, 2018 by SeanoH09
The ________ is the spherical outer portion of the Galaxy, including the orbits of the globular ... Started by Jkov05	1 Replies 88 Views	Jul 27, 2018 by dmurph1496
In 1998 came the discovery of ________, which seems to overwhelm even gravity and all the dark ... Started by ssal	1 Replies 59 Views	Jul 27, 2018 by bigcheese9
It is the distribution of ________ atoms in the spiral arms that is measured with 21-cm radio maps. ... Started by yoroshambo	1 Replies 67 Views	Jul 27, 2018 by AmberC1996
The microwave background we now observe dates back to ________ of matter and energy at 3,000 K. ... Started by CORALGRILL2014	3 Replies 42 Views	Jul 27, 2018 by fwbard
Jupiter's magnetic field is much stronger than Earth's, and has a magnetic tail that extends beyond ... Started by 809779	1 Replies 142 Views	Jul 27, 2018 by cassie_ragen
To the outer edge of the Galaxy, the rotation curve finds objects moving ________ than Kepler's Laws ... Started by Garrulous	1 Replies 94 Views	Jul 27, 2018 by durant1234
When the universe was several hundred thousand years old, matter and energy decoupled, allowing the ... Started by Medesa	1 Replies 68 Views	Jul 27, 2018 by kishoreddi
Prior to decoupling, all matter was ________, with free electrons and nuclei. Fill in the ... Started by ss2343	3 Replies 81 Views	Jul 27, 2018 by meganlapinski
Stars evolve along the main sequence. Indicate whether the statement is true or ... Started by Bernana	1 Replies 164 Views	Jul 27, 2018 by jrpg123456
Counting only the material between us and the galactic Center, we measure a mass of ________ billion ... Started by Sportsfan2111	1 Replies 63 Views	Jul 27, 2018 by yeungji