The total mass of the pair of stars in spectroscopic binaries are difficult to estimate because
a. we can't measure the radial velocities of each star in the system.
b. we can't see the shape or tilt of the orbit.
c. we can't find the diameters of the stars.
d. we can't determine the luminosities of the stars.
e. the Doppler shift is not measurable.
Question 2
The optical shape of segmented mirrors is controlled by computer-driven thrusters under the mirrors in what is called
a. an achromatic lens.
b. active optics.
c. a Schmidt-Cassegrain design.
d. a Newtonian design.
e. interferometry.
The same star field photographed with (a) a ground-based telescope, which is subject to poor seeing
The Spectra of Stars with Different Surface Temperatures.
This five-wire mass air flow sensor consists of a metal foil sensing unit, an intake air temperature ...
(a) In nondisjunction in meiosis I, one pair of chromosomes fails to separate properly at anaphase I
Gravitational Force Due to a Distribution of Mass problem 2
Mass spectrometry of a synthetic version of collagen peptide