Physics

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The primary way that we observe the atomic hydrogen that makes up most of the interstellar gas in ... Started by cnetterville	1 Replies 156 Views	Jul 27, 2018 by marict
It is very cold, but otherwise comfortable. You breathe deeply. Although there is no oxygen, the air ... Started by mmm	1 Replies 67 Views	Jul 27, 2018 by Kimmy
What do we mean by the frost line when we discuss the formation of planets in the solar nebula? ... Started by dakota nelson	1 Replies 63 Views	Jul 27, 2018 by karlss
You find yourself in a maelstrom, whipped by winds gusting at 10,000 km/hr, rising and falling in ... Started by anshika	3 Replies 44 Views	Jul 27, 2018 by mceravolo
The mass range for neutron stars is A) 0.08 to 0.4 solar masses. B) 0.4 to 3 solar masses. C) ... Started by tiara099	1 Replies 88 Views	Jul 27, 2018 by brbarasa
A wave with a period of .01 seconds has a frequency of ________ Hz. Fill in the blank(s) with ... Started by Brittanyd9008	1 Replies 84 Views	Jul 27, 2018 by tandmlomax84
Interstellar dust consists mostly of ________. A) the same tiny particles found in household dust ... Started by cdr_15	1 Replies 171 Views	Jul 27, 2018 by HandsomeMarc
The percentage of dark matter in galactic clusters is less than the percentage in individual ... Started by Kikoku	3 Replies 83 Views	Jul 27, 2018 by katheyjon
The corona can only be glimpsed from Earth during a(n) ________. Fill in the blank(s) with ... Started by audragclark	1 Replies 41 Views	Jul 27, 2018 by debra928
Head-tail radio galaxies reveal their motion through the intergalactic gas with a tail-like ... Started by rosent76	1 Replies 97 Views	Jul 27, 2018 by milbourne11
You find yourself on a silent airless world The lack of an atmosphere means that you must be very ... Started by pepyto	1 Replies 38 Views	Jul 27, 2018 by pangili4
Compared to the underlying photosphere and chromosphere, the corona is ________ in temperature. ... Started by asmith134	3 Replies 93 Views	Jul 27, 2018 by Bigfoot1984
Most stars in the Milky Way's halo are ________. A) found inside molecular clouds B) very young ... Started by captainjonesify	1 Replies 62 Views	Jul 27, 2018 by mirabriestensky
It's cold. You are sitting on what appears to be a water ice-covered world. The Sun is low on the ... Started by kwoodring	1 Replies 56 Views	Jul 27, 2018 by kaillie
The ________ blows out of the coronal holes. Fill in the blank(s) with correct ... Started by charchew	1 Replies 54 Views	Jul 27, 2018 by nyrave
Assume that the average rate of 1-km sized asteroids hitting the Earth is about 1 every million ... Started by burchfield96	3 Replies 285 Views	Jul 27, 2018 by catron30
What is an ionization nebula? A) a name sometimes used to describe spiral galaxies besides the ... Started by DyllonKazuo	1 Replies 55 Views	Jul 27, 2018 by ririgirl15
Sunspots are ________ poles in the photosphere. Fill in the blank(s) with correct ... Started by imowrer	1 Replies 61 Views	Jul 27, 2018 by bitingbit
What is the giant impact hypothesis for the origin of the Moon? A) The Moon originally was about ... Started by saliriagwu	1 Replies 80 Views	Jul 27, 2018 by emsimon14
What makes the Crab Nebula pulsar unusual among other pulsars? A) It is a magnetar, with far more ... Started by sdfghj	3 Replies 69 Views	Jul 27, 2018 by itsakadoozi
The largest known galaxies contain about 10 billion solar masses. Indicate whether the statement ... Started by mia	1 Replies 94 Views	Jul 27, 2018 by huda
Suppose you start with 1 kilogram of a radioactive substance that has a half-life of 10 years. Which ... Started by ARLKQ	1 Replies 187 Views	Jul 27, 2018 by AaaA
The last major dinosaurs were wiped out as a consequence of a major impact with the Earth about 65 ... Started by abc	1 Replies 266 Views	Jul 27, 2018 by amandalm
What do halo stars do differently from disk stars? A) They orbit the galactic center with many ... Started by 2125004343	3 Replies 177 Views	Jul 27, 2018 by irishcancer18
During a period of high solar activity, most sunspots lie near the Sun's ________. Fill in the ... Started by ahriuashd	1 Replies 55 Views	Jul 27, 2018 by leeeep