Why would an eclipsing binary be more valuable than an ordinary spectroscopic binary in accurately determining stellar parameters? (hint: consider the spectroscopic information here.)
describe three differences in the p-p chain and cno cycle for converting h into he in main sequence stars.
explain why type ia supernovae are favoured for determining distances to galaxies, how they could be distinguished from type ii supernovae, and explain at least one drawback in their use as standard candles.
list three observations that suggest that much of the matter in the universe is “dark.”
explain differential rotation of the galaxy and how it affects observations of the spectra of stars in the galaxy relative to an observer on earth.
why can’t an isolated white dwarf contract as it cools? what is its fate?
Answers: 3
Geography, 22.06.2019 04:30
What is a reasonable action that provides safe water for communities?
Answers: 2
Geography, 23.06.2019 13:30
When volcanoes erupt, magma (hot, molten rock) rises toward the surface of the earth. as magma cools, solid rock forms. this rock contains substances from the interior of the earth. which of the following natural resources is likely to be plentiful near subduction zones where volcanic activity has occurred in the past?
Answers: 1
Geography, 23.06.2019 18:00
The separation of northern ireland from the republic of ireland is an example of
Answers: 1
Geography, 23.06.2019 23:00
Zac wanted to determine the measure of r and of ? r in the triangle below. to fine the measure of r, zac sets up the problem.42^2 + 24^2 = r 2. determine whether zac set the problem up correctly.
Answers: 3
Why would an eclipsing binary be more valuable than an ordinary spectroscopic binary in accurately d...
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