If the speed of light were not absolute, the speed at which light from a star in a binary system came towards the Earth would depends on the star's
A) position and velocity
B) distance
C) masses
D) sizes
A
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What is the global positioning system (GPS)?
A) a system for determining positions on Earth using signals from a set of satellites in Earth orbit B) a system for determining positions on the Earth by careful observations of the Sun and stars C) a system of determining positions on the Earth by receiving radio signals from many ground-based beacons D) a term used to refer to any type of celestial navigation
More massive stars are able to form in a ________ time than less massive stars
Fill in the blank(s) with correct word
Although it is almost the same size as Jupiter, Saturn's gravity is about 2.5 times less, because of Saturn's lower mass and density
Indicate whether the statement is true or false
When discussing stellar lives, astronomers divide stars by mass into low-mass, intermediate-mass, and high-mass stars. Which category includes our Sun?
A) The Sun is a low-mass star. B) The Sun is an intermediate-mass star. C) The Sun is a high-mass star.