What triggers the collapse of interstellar clouds to form stars? A density increase in a region of the cloud initiates the attraction of more material in the region by means of
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As the nebula or the molecular cloud contracts due to gravit…
As the nebula or the molecular cloud contracts due to gravity
The solar sunspot activity occurs in cycles of
The solar sunspot activity occurs in cycles of
Our Sun is expected to remain on the main sequence for
Our Sun is expected to remain on the main sequence for
The temperature of the visible surface of our Sun is
The temperature of the visible surface of our Sun is
A star when observed through a powerful telescope has a Stel…
A star when observed through a powerful telescope has a Stellar Parallax of 0.25 arcsecs. What is the distance to the star?
The more massive a main sequence star is
The more massive a main sequence star is
The more massive the star on the main sequence is
The more massive the star on the main sequence is
Which of the following would not result from a C. difficile …
Which of the following would not result from a C. difficile infection?
The reservoir for typhoid fever is usually:
The reservoir for typhoid fever is usually: