Physics

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L dwarfs and T dwarfs are spectral classes of _____. A) brown dwarf stars B) red giant stars ... Started by nelaaney	3 Replies 112 Views	Jul 27, 2018 by mirabriestensky
Spectra are often represented as graphs of: A) distance versus luminosity. B) temperature ... Started by chandani	1 Replies 59 Views	Jul 27, 2018 by mistyjohnson
If you measure a parallax of 0.006 arc seconds from an observatory on the ground, your uncertainty ... Started by jessicacav	1 Replies 46 Views	Jul 27, 2018 by Kedrick2014
If you take a photograph of a nearby star and after 6 months take another photograph of the star ... Started by LCritchfi	1 Replies 72 Views	Jul 27, 2018 by Christopher
In the context of the mass-luminosity relation, a star with a mass of 2 solar masses on the main ... Started by itsmyluck	3 Replies 110 Views	Jul 27, 2018 by dpost18
The visible star nearest the Sun,__________, has a parallax of only 0.76 arc seconds. A) Procyon ... Started by lak	1 Replies 55 Views	Jul 27, 2018 by upturnedfurball
In the context of star masses, _____ is the key to determining mass. A) temperature B) ... Started by newbem	1 Replies 45 Views	Jul 27, 2018 by thall411
In the context of star sizes, which of the following statements is true of a star's luminosity? ... Started by CBme	1 Replies 87 Views	Jul 27, 2018 by Natalie4ever
Star cluster NGC 4755, also known as the Jewel Box, is located in the constellation _____. A) ... Started by cnetterville	3 Replies 140 Views	Jul 27, 2018 by mariahkathleeen
Which of the following statements is true of the spectral sequence? A) It is classified in groups ... Started by ec501234	1 Replies 63 Views	Jul 27, 2018 by ngr69
The distance to an imaginary star is 2 pc when measured via parallax. What will this distance be ... Started by Charlie	1 Replies 97 Views	Jul 27, 2018 by jazzlynnnnn
Discuss the important characteristics that could be revealed if you were to conduct a survey on the ... Started by jace	1 Replies 63 Views	Jul 27, 2018 by nixon_s
Explain how astronomers find out how much energy is emitted by stars. What will be an ideal ... Started by tuffie	3 Replies 100 Views	Jul 27, 2018 by flexer1n1
The hottest star in the Orion Nebula is about the same mass as the Sun. Indicate whether the ... Started by jasdeep_brar	1 Replies 103 Views	Jul 27, 2018 by pami445
When a star has exhausted all of its hydrogen, it is said to have reached the zero-age main sequence ... Started by kellyjaisingh	1 Replies 99 Views	Jul 27, 2018 by jonathanballen97
The dominant trigger of star formation in our Galaxy is supernova explosions. Indicate whether ... Started by vicky	1 Replies 61 Views	Jul 27, 2018 by moormoney
Because of the scattering of light by dense clouds, the stars appear bluer than they should for ... Started by aabwk4	3 Replies 95 Views	Jul 27, 2018 by yifu223
Of all the stars in the Orion Nebula, only three are hot enough to ionize hydrogen. Indicate ... Started by Bob-Dole	1 Replies 73 Views	Jul 27, 2018 by ryansturges
Convection is a mode of energy transport between materials that requires close contact between the ... Started by gonzo233	1 Replies 35 Views	Jul 27, 2018 by duy1981999
Nuclear reactions in stars manufacture energy and heavy atoms under the supervision of a natural ... Started by piesebel	1 Replies 61 Views	Jul 27, 2018 by Athena23
Identify a true statement about brown dwarfs. A) They are low-luminosity objects. B) They are ... Started by joesmith1212	3 Replies 120 Views	Jul 27, 2018 by vish98
The warmer brown dwarfs fall in spectral class _____. A) O B) A C) L D) ... Started by sammy	1 Replies 74 Views	Jul 27, 2018 by gstein359
A _____ is a collapsing cloud of gas and dust destined to become a star. A) protostar B) ... Started by gbarreiro	1 Replies 77 Views	Jul 27, 2018 by xthemafja
The strong nuclear force is involved in: A) binding together atomic nuclei. B) developing the ... Started by wrbasek0	1 Replies 71 Views	Jul 27, 2018 by joshraies
For each 4He produced in a proton-proton chain, _____. A) the first reaction must occur four ... Started by strangeaffliction	3 Replies 234 Views	Jul 27, 2018 by miss.ashley